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/Problem15_label08_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:31:56,999 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:31:57,001 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:31:57,013 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:31:57,014 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:31:57,015 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:31:57,016 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:31:57,018 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:31:57,020 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:31:57,021 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:31:57,022 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:31:57,022 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:31:57,023 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:31:57,024 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:31:57,025 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:31:57,026 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:31:57,027 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:31:57,029 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:31:57,031 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:31:57,036 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:31:57,037 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:31:57,038 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:31:57,040 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 16:31:57,048 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 16:31:57,063 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:31:57,064 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:31:57,065 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:31:57,065 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:31:57,065 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:31:57,066 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:31:57,066 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:31:57,066 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:31:57,066 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:31:57,066 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:31:57,067 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:31:57,067 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:31:57,067 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:31:57,067 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:31:57,067 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:31:57,068 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:31:57,068 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:31:57,068 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:31:57,068 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:31:57,068 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:31:57,068 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:31:57,069 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:31:57,069 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:31:57,069 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:31:57,069 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:31:57,069 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:31:57,070 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:31:57,070 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:31:57,137 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:31:57,150 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:31:57,154 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:31:57,155 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:31:57,156 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:31:57,156 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label08_true-unreach-call.c [2018-10-24 16:31:57,215 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d654633da/5835d3fca39b4476be72cb988335ba2a/FLAG1d1cb4a3d [2018-10-24 16:31:57,847 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:31:57,848 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label08_true-unreach-call.c [2018-10-24 16:31:57,873 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d654633da/5835d3fca39b4476be72cb988335ba2a/FLAG1d1cb4a3d [2018-10-24 16:31:57,895 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d654633da/5835d3fca39b4476be72cb988335ba2a [2018-10-24 16:31:57,907 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:31:57,908 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:31:57,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:31:57,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:31:57,914 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:31:57,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:31:57" (1/1) ... [2018-10-24 16:31:57,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769a0e85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:57, skipping insertion in model container [2018-10-24 16:31:57,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:31:57" (1/1) ... [2018-10-24 16:31:57,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:31:58,031 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:31:58,837 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:31:58,841 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:31:59,135 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:31:59,156 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:31:59,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:59 WrapperNode [2018-10-24 16:31:59,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:31:59,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:31:59,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:31:59,158 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:31:59,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:59" (1/1) ... [2018-10-24 16:31:59,205 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:59" (1/1) ... [2018-10-24 16:31:59,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:31:59,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:31:59,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:31:59,569 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:31:59,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:59" (1/1) ... [2018-10-24 16:31:59,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:59" (1/1) ... [2018-10-24 16:31:59,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:59" (1/1) ... [2018-10-24 16:31:59,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:59" (1/1) ... [2018-10-24 16:31:59,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:59" (1/1) ... [2018-10-24 16:31:59,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:59" (1/1) ... [2018-10-24 16:31:59,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:59" (1/1) ... [2018-10-24 16:31:59,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:31:59,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:31:59,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:31:59,855 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:31:59,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:31:59,926 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:31:59,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:31:59,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:32:08,095 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:32:08,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:32:08 BoogieIcfgContainer [2018-10-24 16:32:08,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:32:08,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:32:08,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:32:08,102 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:32:08,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:31:57" (1/3) ... [2018-10-24 16:32:08,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60bc47fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:32:08, skipping insertion in model container [2018-10-24 16:32:08,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:31:59" (2/3) ... [2018-10-24 16:32:08,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60bc47fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:32:08, skipping insertion in model container [2018-10-24 16:32:08,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:32:08" (3/3) ... [2018-10-24 16:32:08,106 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label08_true-unreach-call.c [2018-10-24 16:32:08,118 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:32:08,127 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:32:08,144 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:32:08,184 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:32:08,185 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:32:08,185 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:32:08,185 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:32:08,185 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:32:08,185 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:32:08,186 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:32:08,186 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:32:08,186 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:32:08,216 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states. [2018-10-24 16:32:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-24 16:32:08,226 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:32:08,227 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:32:08,230 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:32:08,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:32:08,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2139005982, now seen corresponding path program 1 times [2018-10-24 16:32:08,239 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:32:08,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:32:08,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:08,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:08,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:08,773 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-10-24 16:32:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:32:08,795 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:32:08,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:32:08,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:32:08,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:32:08,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:32:08,822 INFO L87 Difference]: Start difference. First operand 425 states. Second operand 4 states. [2018-10-24 16:32:19,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:32:19,808 INFO L93 Difference]: Finished difference Result 1474 states and 2723 transitions. [2018-10-24 16:32:19,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:32:19,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2018-10-24 16:32:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:32:19,841 INFO L225 Difference]: With dead ends: 1474 [2018-10-24 16:32:19,841 INFO L226 Difference]: Without dead ends: 1042 [2018-10-24 16:32:19,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:32:19,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2018-10-24 16:32:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 1040. [2018-10-24 16:32:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1040 states. [2018-10-24 16:32:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1638 transitions. [2018-10-24 16:32:19,971 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1638 transitions. Word has length 52 [2018-10-24 16:32:19,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:32:19,971 INFO L481 AbstractCegarLoop]: Abstraction has 1040 states and 1638 transitions. [2018-10-24 16:32:19,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:32:19,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1638 transitions. [2018-10-24 16:32:19,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-24 16:32:19,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:32:19,978 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:32:19,978 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:32:19,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:32:19,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2043425283, now seen corresponding path program 1 times [2018-10-24 16:32:19,979 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:32:19,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:32:19,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:19,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:19,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:32:20,339 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:32:20,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:32:20,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:32:20,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:32:20,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:32:20,342 INFO L87 Difference]: Start difference. First operand 1040 states and 1638 transitions. Second operand 4 states. [2018-10-24 16:32:30,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:32:30,206 INFO L93 Difference]: Finished difference Result 3887 states and 6230 transitions. [2018-10-24 16:32:30,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:32:30,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2018-10-24 16:32:30,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:32:30,224 INFO L225 Difference]: With dead ends: 3887 [2018-10-24 16:32:30,225 INFO L226 Difference]: Without dead ends: 2849 [2018-10-24 16:32:30,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:32:30,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2018-10-24 16:32:30,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2844. [2018-10-24 16:32:30,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2844 states. [2018-10-24 16:32:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 4039 transitions. [2018-10-24 16:32:30,295 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 4039 transitions. Word has length 118 [2018-10-24 16:32:30,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:32:30,296 INFO L481 AbstractCegarLoop]: Abstraction has 2844 states and 4039 transitions. [2018-10-24 16:32:30,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:32:30,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 4039 transitions. [2018-10-24 16:32:30,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-10-24 16:32:30,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:32:30,314 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:32:30,314 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:32:30,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:32:30,315 INFO L82 PathProgramCache]: Analyzing trace with hash -2102953207, now seen corresponding path program 1 times [2018-10-24 16:32:30,315 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:32:30,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:32:30,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:30,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:30,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 99 proven. 4 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-10-24 16:32:30,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:32:30,761 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:32:30,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:30,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:32:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 190 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:32:31,170 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:32:31,170 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-24 16:32:31,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:32:31,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:32:31,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:32:31,178 INFO L87 Difference]: Start difference. First operand 2844 states and 4039 transitions. Second operand 4 states. [2018-10-24 16:32:35,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:32:35,992 INFO L93 Difference]: Finished difference Result 10857 states and 15533 transitions. [2018-10-24 16:32:35,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:32:35,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 264 [2018-10-24 16:32:35,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:32:36,042 INFO L225 Difference]: With dead ends: 10857 [2018-10-24 16:32:36,043 INFO L226 Difference]: Without dead ends: 8015 [2018-10-24 16:32:36,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:32:36,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8015 states. [2018-10-24 16:32:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8015 to 4646. [2018-10-24 16:32:36,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4646 states. [2018-10-24 16:32:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4646 states to 4646 states and 6263 transitions. [2018-10-24 16:32:36,176 INFO L78 Accepts]: Start accepts. Automaton has 4646 states and 6263 transitions. Word has length 264 [2018-10-24 16:32:36,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:32:36,177 INFO L481 AbstractCegarLoop]: Abstraction has 4646 states and 6263 transitions. [2018-10-24 16:32:36,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:32:36,177 INFO L276 IsEmpty]: Start isEmpty. Operand 4646 states and 6263 transitions. [2018-10-24 16:32:36,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-10-24 16:32:36,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:32:36,188 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:32:36,188 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:32:36,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:32:36,188 INFO L82 PathProgramCache]: Analyzing trace with hash 147879681, now seen corresponding path program 1 times [2018-10-24 16:32:36,189 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:32:36,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:32:36,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:36,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:36,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:36,594 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-24 16:32:36,888 WARN L179 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-10-24 16:32:37,245 WARN L179 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-24 16:32:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-10-24 16:32:37,506 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:32:37,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:32:37,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:32:37,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:32:37,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:32:37,507 INFO L87 Difference]: Start difference. First operand 4646 states and 6263 transitions. Second operand 5 states. [2018-10-24 16:32:46,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:32:46,100 INFO L93 Difference]: Finished difference Result 11092 states and 14512 transitions. [2018-10-24 16:32:46,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:32:46,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 332 [2018-10-24 16:32:46,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:32:46,130 INFO L225 Difference]: With dead ends: 11092 [2018-10-24 16:32:46,130 INFO L226 Difference]: Without dead ends: 6448 [2018-10-24 16:32:46,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:32:46,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6448 states. [2018-10-24 16:32:46,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6448 to 6147. [2018-10-24 16:32:46,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6147 states. [2018-10-24 16:32:46,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6147 states to 6147 states and 7862 transitions. [2018-10-24 16:32:46,242 INFO L78 Accepts]: Start accepts. Automaton has 6147 states and 7862 transitions. Word has length 332 [2018-10-24 16:32:46,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:32:46,243 INFO L481 AbstractCegarLoop]: Abstraction has 6147 states and 7862 transitions. [2018-10-24 16:32:46,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:32:46,244 INFO L276 IsEmpty]: Start isEmpty. Operand 6147 states and 7862 transitions. [2018-10-24 16:32:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-10-24 16:32:46,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:32:46,255 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:32:46,255 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:32:46,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:32:46,255 INFO L82 PathProgramCache]: Analyzing trace with hash -2100025585, now seen corresponding path program 1 times [2018-10-24 16:32:46,256 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:32:46,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:32:46,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:46,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:46,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:32:46,799 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:32:46,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:32:46,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:32:46,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:32:46,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:32:46,801 INFO L87 Difference]: Start difference. First operand 6147 states and 7862 transitions. Second operand 4 states. [2018-10-24 16:32:51,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:32:51,471 INFO L93 Difference]: Finished difference Result 15298 states and 20011 transitions. [2018-10-24 16:32:51,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:32:51,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 406 [2018-10-24 16:32:51,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:32:51,505 INFO L225 Difference]: With dead ends: 15298 [2018-10-24 16:32:51,505 INFO L226 Difference]: Without dead ends: 9153 [2018-10-24 16:32:51,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:32:51,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9153 states. [2018-10-24 16:32:51,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9153 to 9150. [2018-10-24 16:32:51,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9150 states. [2018-10-24 16:32:51,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9150 states to 9150 states and 11448 transitions. [2018-10-24 16:32:51,669 INFO L78 Accepts]: Start accepts. Automaton has 9150 states and 11448 transitions. Word has length 406 [2018-10-24 16:32:51,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:32:51,670 INFO L481 AbstractCegarLoop]: Abstraction has 9150 states and 11448 transitions. [2018-10-24 16:32:51,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:32:51,670 INFO L276 IsEmpty]: Start isEmpty. Operand 9150 states and 11448 transitions. [2018-10-24 16:32:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2018-10-24 16:32:51,687 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:32:51,688 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:32:51,688 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:32:51,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:32:51,688 INFO L82 PathProgramCache]: Analyzing trace with hash 593964008, now seen corresponding path program 1 times [2018-10-24 16:32:51,688 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:32:51,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:32:51,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:51,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:51,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:32:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 418 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-10-24 16:32:52,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:32:52,808 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:32:52,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:32:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:32:52,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:32:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 381 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-10-24 16:32:53,247 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:32:53,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-24 16:32:53,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 16:32:53,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 16:32:53,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:32:53,249 INFO L87 Difference]: Start difference. First operand 9150 states and 11448 transitions. Second operand 8 states. [2018-10-24 16:33:03,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:33:03,591 INFO L93 Difference]: Finished difference Result 22668 states and 27579 transitions. [2018-10-24 16:33:03,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 16:33:03,592 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 482 [2018-10-24 16:33:03,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:33:03,614 INFO L225 Difference]: With dead ends: 22668 [2018-10-24 16:33:03,614 INFO L226 Difference]: Without dead ends: 9445 [2018-10-24 16:33:03,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 485 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:33:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9445 states. [2018-10-24 16:33:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9445 to 9145. [2018-10-24 16:33:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9145 states. [2018-10-24 16:33:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9145 states to 9145 states and 10683 transitions. [2018-10-24 16:33:03,749 INFO L78 Accepts]: Start accepts. Automaton has 9145 states and 10683 transitions. Word has length 482 [2018-10-24 16:33:03,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:33:03,750 INFO L481 AbstractCegarLoop]: Abstraction has 9145 states and 10683 transitions. [2018-10-24 16:33:03,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 16:33:03,750 INFO L276 IsEmpty]: Start isEmpty. Operand 9145 states and 10683 transitions. [2018-10-24 16:33:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2018-10-24 16:33:03,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:33:03,766 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 16:33:03,767 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:33:03,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:33:03,767 INFO L82 PathProgramCache]: Analyzing trace with hash 404113246, now seen corresponding path program 1 times [2018-10-24 16:33:03,767 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:33:03,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:33:03,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:03,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:33:03,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:33:04,588 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-24 16:33:05,179 WARN L179 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2018-10-24 16:33:05,928 WARN L179 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2018-10-24 16:33:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 315 proven. 136 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-10-24 16:33:06,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:33:06,537 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:33:06,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:33:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:33:06,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:33:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-24 16:33:07,003 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:33:07,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2018-10-24 16:33:07,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 16:33:07,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 16:33:07,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:33:07,006 INFO L87 Difference]: Start difference. First operand 9145 states and 10683 transitions. Second operand 9 states. [2018-10-24 16:33:15,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:33:15,433 INFO L93 Difference]: Finished difference Result 18706 states and 21787 transitions. [2018-10-24 16:33:15,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 16:33:15,434 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 558 [2018-10-24 16:33:15,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:33:15,452 INFO L225 Difference]: With dead ends: 18706 [2018-10-24 16:33:15,452 INFO L226 Difference]: Without dead ends: 9563 [2018-10-24 16:33:15,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 562 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:33:15,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9563 states. [2018-10-24 16:33:15,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9563 to 9141. [2018-10-24 16:33:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9141 states. [2018-10-24 16:33:15,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9141 states to 9141 states and 10091 transitions. [2018-10-24 16:33:15,577 INFO L78 Accepts]: Start accepts. Automaton has 9141 states and 10091 transitions. Word has length 558 [2018-10-24 16:33:15,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:33:15,578 INFO L481 AbstractCegarLoop]: Abstraction has 9141 states and 10091 transitions. [2018-10-24 16:33:15,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 16:33:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand 9141 states and 10091 transitions. [2018-10-24 16:33:15,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2018-10-24 16:33:15,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:33:15,599 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:33:15,599 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:33:15,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:33:15,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1175997957, now seen corresponding path program 1 times [2018-10-24 16:33:15,599 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:33:15,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:33:15,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:15,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:33:15,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:33:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-10-24 16:33:17,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:33:17,208 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:33:17,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:33:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:33:17,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:33:17,776 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 16 [2018-10-24 16:33:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-10-24 16:33:18,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:33:18,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2018-10-24 16:33:18,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:33:18,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:33:18,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:33:18,730 INFO L87 Difference]: Start difference. First operand 9141 states and 10091 transitions. Second operand 7 states. [2018-10-24 16:33:30,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:33:30,109 INFO L93 Difference]: Finished difference Result 35300 states and 39221 transitions. [2018-10-24 16:33:30,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 16:33:30,110 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 596 [2018-10-24 16:33:30,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:33:30,161 INFO L225 Difference]: With dead ends: 35300 [2018-10-24 16:33:30,162 INFO L226 Difference]: Without dead ends: 26161 [2018-10-24 16:33:30,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 594 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-24 16:33:30,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26161 states. [2018-10-24 16:33:30,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26161 to 14285. [2018-10-24 16:33:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14285 states. [2018-10-24 16:33:30,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14285 states to 14285 states and 15414 transitions. [2018-10-24 16:33:30,428 INFO L78 Accepts]: Start accepts. Automaton has 14285 states and 15414 transitions. Word has length 596 [2018-10-24 16:33:30,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:33:30,429 INFO L481 AbstractCegarLoop]: Abstraction has 14285 states and 15414 transitions. [2018-10-24 16:33:30,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 16:33:30,430 INFO L276 IsEmpty]: Start isEmpty. Operand 14285 states and 15414 transitions. [2018-10-24 16:33:30,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2018-10-24 16:33:30,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:33:30,440 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:33:30,440 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:33:30,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:33:30,441 INFO L82 PathProgramCache]: Analyzing trace with hash -470184576, now seen corresponding path program 1 times [2018-10-24 16:33:30,441 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:33:30,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:33:30,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:30,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:33:30,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:33:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 442 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-24 16:33:31,165 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:33:31,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:33:31,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:33:31,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:33:31,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:33:31,166 INFO L87 Difference]: Start difference. First operand 14285 states and 15414 transitions. Second operand 3 states. [2018-10-24 16:33:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:33:33,466 INFO L93 Difference]: Finished difference Result 30322 states and 32681 transitions. [2018-10-24 16:33:33,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:33:33,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 617 [2018-10-24 16:33:33,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:33:33,487 INFO L225 Difference]: With dead ends: 30322 [2018-10-24 16:33:33,487 INFO L226 Difference]: Without dead ends: 11785 [2018-10-24 16:33:33,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:33:33,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11785 states. [2018-10-24 16:33:33,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11785 to 7563. [2018-10-24 16:33:33,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7563 states. [2018-10-24 16:33:33,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7563 states to 7563 states and 7885 transitions. [2018-10-24 16:33:33,624 INFO L78 Accepts]: Start accepts. Automaton has 7563 states and 7885 transitions. Word has length 617 [2018-10-24 16:33:33,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:33:33,625 INFO L481 AbstractCegarLoop]: Abstraction has 7563 states and 7885 transitions. [2018-10-24 16:33:33,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:33:33,625 INFO L276 IsEmpty]: Start isEmpty. Operand 7563 states and 7885 transitions. [2018-10-24 16:33:33,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 728 [2018-10-24 16:33:33,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:33:33,635 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:33:33,636 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:33:33,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:33:33,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1410963826, now seen corresponding path program 1 times [2018-10-24 16:33:33,636 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:33:33,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:33:33,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:33,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:33:33,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:33:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 477 proven. 50 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-24 16:33:35,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:33:35,960 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:33:35,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:33:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:33:36,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:33:36,734 WARN L179 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2018-10-24 16:33:37,061 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-10-24 16:33:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 477 proven. 50 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-24 16:33:38,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:33:38,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 13 [2018-10-24 16:33:38,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 16:33:38,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 16:33:38,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-10-24 16:33:38,325 INFO L87 Difference]: Start difference. First operand 7563 states and 7885 transitions. Second operand 13 states. [2018-10-24 16:33:50,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:33:50,945 INFO L93 Difference]: Finished difference Result 25613 states and 26764 transitions. [2018-10-24 16:33:50,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-24 16:33:50,946 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 727 [2018-10-24 16:33:50,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:33:50,975 INFO L225 Difference]: With dead ends: 25613 [2018-10-24 16:33:50,975 INFO L226 Difference]: Without dead ends: 17750 [2018-10-24 16:33:50,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 736 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2018-10-24 16:33:50,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17750 states. [2018-10-24 16:33:51,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17750 to 10864. [2018-10-24 16:33:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10864 states. [2018-10-24 16:33:51,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10864 states to 10864 states and 11238 transitions. [2018-10-24 16:33:51,157 INFO L78 Accepts]: Start accepts. Automaton has 10864 states and 11238 transitions. Word has length 727 [2018-10-24 16:33:51,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:33:51,158 INFO L481 AbstractCegarLoop]: Abstraction has 10864 states and 11238 transitions. [2018-10-24 16:33:51,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 16:33:51,158 INFO L276 IsEmpty]: Start isEmpty. Operand 10864 states and 11238 transitions. [2018-10-24 16:33:51,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2018-10-24 16:33:51,174 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:33:51,175 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:33:51,175 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:33:51,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:33:51,176 INFO L82 PathProgramCache]: Analyzing trace with hash 403974983, now seen corresponding path program 1 times [2018-10-24 16:33:51,176 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:33:51,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:33:51,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:51,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:33:51,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:33:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 813 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2018-10-24 16:33:52,070 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:33:52,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:33:52,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:33:52,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:33:52,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:33:52,071 INFO L87 Difference]: Start difference. First operand 10864 states and 11238 transitions. Second operand 4 states. [2018-10-24 16:33:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:33:54,144 INFO L93 Difference]: Finished difference Result 21426 states and 22172 transitions. [2018-10-24 16:33:54,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:33:54,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 825 [2018-10-24 16:33:54,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:33:54,155 INFO L225 Difference]: With dead ends: 21426 [2018-10-24 16:33:54,156 INFO L226 Difference]: Without dead ends: 10561 [2018-10-24 16:33:54,164 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 16:33:54,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2018-10-24 16:33:54,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 10561. [2018-10-24 16:33:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10561 states. [2018-10-24 16:33:54,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10561 states to 10561 states and 10862 transitions. [2018-10-24 16:33:54,303 INFO L78 Accepts]: Start accepts. Automaton has 10561 states and 10862 transitions. Word has length 825 [2018-10-24 16:33:54,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:33:54,304 INFO L481 AbstractCegarLoop]: Abstraction has 10561 states and 10862 transitions. [2018-10-24 16:33:54,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:33:54,304 INFO L276 IsEmpty]: Start isEmpty. Operand 10561 states and 10862 transitions. [2018-10-24 16:33:54,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2018-10-24 16:33:54,321 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:33:54,322 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:33:54,323 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:33:54,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:33:54,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1053157093, now seen corresponding path program 1 times [2018-10-24 16:33:54,323 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:33:54,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:33:54,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:54,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:33:54,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:33:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1049 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2018-10-24 16:33:55,008 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:33:55,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:33:55,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:33:55,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:33:55,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:33:55,010 INFO L87 Difference]: Start difference. First operand 10561 states and 10862 transitions. Second operand 3 states. [2018-10-24 16:33:56,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:33:56,545 INFO L93 Difference]: Finished difference Result 23220 states and 23882 transitions. [2018-10-24 16:33:56,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:33:56,546 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 826 [2018-10-24 16:33:56,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:33:56,557 INFO L225 Difference]: With dead ends: 23220 [2018-10-24 16:33:56,557 INFO L226 Difference]: Without dead ends: 12659 [2018-10-24 16:33:56,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:33:56,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12659 states. [2018-10-24 16:33:56,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12659 to 11453. [2018-10-24 16:33:56,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11453 states. [2018-10-24 16:33:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11453 states to 11453 states and 11742 transitions. [2018-10-24 16:33:56,694 INFO L78 Accepts]: Start accepts. Automaton has 11453 states and 11742 transitions. Word has length 826 [2018-10-24 16:33:56,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:33:56,695 INFO L481 AbstractCegarLoop]: Abstraction has 11453 states and 11742 transitions. [2018-10-24 16:33:56,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:33:56,695 INFO L276 IsEmpty]: Start isEmpty. Operand 11453 states and 11742 transitions. [2018-10-24 16:33:56,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 893 [2018-10-24 16:33:56,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:33:56,713 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:33:56,713 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:33:56,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:33:56,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1939654473, now seen corresponding path program 1 times [2018-10-24 16:33:56,714 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:33:56,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:33:56,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:56,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:33:56,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:33:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:33:57,230 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 3 [2018-10-24 16:33:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 690 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2018-10-24 16:33:58,027 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:33:58,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:33:58,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:33:58,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:33:58,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:33:58,028 INFO L87 Difference]: Start difference. First operand 11453 states and 11742 transitions. Second operand 3 states. [2018-10-24 16:33:59,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:33:59,947 INFO L93 Difference]: Finished difference Result 27110 states and 27816 transitions. [2018-10-24 16:33:59,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:33:59,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 892 [2018-10-24 16:33:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:33:59,960 INFO L225 Difference]: With dead ends: 27110 [2018-10-24 16:33:59,960 INFO L226 Difference]: Without dead ends: 15959 [2018-10-24 16:33:59,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:33:59,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15959 states. [2018-10-24 16:34:00,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15959 to 13550. [2018-10-24 16:34:00,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13550 states. [2018-10-24 16:34:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13550 states to 13550 states and 13882 transitions. [2018-10-24 16:34:00,106 INFO L78 Accepts]: Start accepts. Automaton has 13550 states and 13882 transitions. Word has length 892 [2018-10-24 16:34:00,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:34:00,106 INFO L481 AbstractCegarLoop]: Abstraction has 13550 states and 13882 transitions. [2018-10-24 16:34:00,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:34:00,106 INFO L276 IsEmpty]: Start isEmpty. Operand 13550 states and 13882 transitions. [2018-10-24 16:34:00,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 978 [2018-10-24 16:34:00,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:34:00,126 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:34:00,126 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:34:00,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:34:00,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2071518071, now seen corresponding path program 1 times [2018-10-24 16:34:00,126 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:34:00,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:34:00,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:34:00,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:34:00,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:34:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:34:01,030 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-24 16:34:01,598 WARN L179 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2018-10-24 16:34:02,033 WARN L179 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2018-10-24 16:34:03,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 658 proven. 303 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2018-10-24 16:34:03,209 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:34:03,209 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:34:03,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:34:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:34:03,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:34:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 775 proven. 50 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2018-10-24 16:34:04,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:34:04,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 11 [2018-10-24 16:34:04,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 16:34:04,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 16:34:04,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2018-10-24 16:34:04,517 INFO L87 Difference]: Start difference. First operand 13550 states and 13882 transitions. Second operand 11 states. [2018-10-24 16:34:13,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:34:13,354 INFO L93 Difference]: Finished difference Result 32123 states and 32897 transitions. [2018-10-24 16:34:13,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-24 16:34:13,354 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 977 [2018-10-24 16:34:13,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:34:13,373 INFO L225 Difference]: With dead ends: 32123 [2018-10-24 16:34:13,373 INFO L226 Difference]: Without dead ends: 18575 [2018-10-24 16:34:13,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 991 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2018-10-24 16:34:13,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18575 states. [2018-10-24 16:34:13,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18575 to 14450. [2018-10-24 16:34:13,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14450 states. [2018-10-24 16:34:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14450 states to 14450 states and 14796 transitions. [2018-10-24 16:34:13,553 INFO L78 Accepts]: Start accepts. Automaton has 14450 states and 14796 transitions. Word has length 977 [2018-10-24 16:34:13,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:34:13,554 INFO L481 AbstractCegarLoop]: Abstraction has 14450 states and 14796 transitions. [2018-10-24 16:34:13,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 16:34:13,554 INFO L276 IsEmpty]: Start isEmpty. Operand 14450 states and 14796 transitions. [2018-10-24 16:34:13,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 994 [2018-10-24 16:34:13,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:34:13,571 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:34:13,571 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:34:13,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:34:13,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1315706566, now seen corresponding path program 1 times [2018-10-24 16:34:13,572 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:34:13,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:34:13,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:34:13,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:34:13,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:34:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:34:14,482 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-10-24 16:34:14,658 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-10-24 16:34:15,051 WARN L179 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2018-10-24 16:34:15,303 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2018-10-24 16:34:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1307 backedges. 879 proven. 321 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-24 16:34:18,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:34:18,936 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:34:18,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:34:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:34:19,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:34:20,330 WARN L179 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 35 DAG size of output: 15 [2018-10-24 16:34:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1307 backedges. 791 proven. 50 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2018-10-24 16:34:22,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 16:34:22,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4] total 21 [2018-10-24 16:34:22,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-24 16:34:22,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-24 16:34:22,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2018-10-24 16:34:22,657 INFO L87 Difference]: Start difference. First operand 14450 states and 14796 transitions. Second operand 21 states. [2018-10-24 16:34:23,641 WARN L179 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2018-10-24 16:34:26,741 WARN L179 SmtUtils]: Spent 998.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2018-10-24 16:34:33,849 WARN L179 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2018-10-24 16:34:34,972 WARN L179 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2018-10-24 16:34:38,072 WARN L179 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2018-10-24 16:34:39,219 WARN L179 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2018-10-24 16:34:40,452 WARN L179 SmtUtils]: Spent 994.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2018-10-24 16:34:41,022 WARN L179 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-10-24 16:34:43,472 WARN L179 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2018-10-24 16:34:45,363 WARN L179 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2018-10-24 16:34:46,288 WARN L179 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2018-10-24 16:34:53,254 WARN L179 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2018-10-24 16:34:57,904 WARN L179 SmtUtils]: Spent 494.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-10-24 16:34:58,293 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2018-10-24 16:34:59,582 WARN L179 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2018-10-24 16:35:02,412 WARN L179 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2018-10-24 16:35:05,183 WARN L179 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2018-10-24 16:35:07,225 WARN L179 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2018-10-24 16:35:08,320 WARN L179 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2018-10-24 16:35:13,505 WARN L179 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2018-10-24 16:35:14,602 WARN L179 SmtUtils]: Spent 619.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2018-10-24 16:35:16,277 WARN L179 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2018-10-24 16:35:18,580 WARN L179 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2018-10-24 16:35:28,218 WARN L179 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2018-10-24 16:35:29,728 WARN L179 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2018-10-24 16:35:31,898 WARN L179 SmtUtils]: Spent 997.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2018-10-24 16:35:32,959 WARN L179 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2018-10-24 16:35:49,629 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 Received shutdown request... [2018-10-24 16:35:55,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-24 16:35:55,947 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:35:55,953 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:35:55,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:35:55 BoogieIcfgContainer [2018-10-24 16:35:55,954 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:35:55,955 INFO L168 Benchmark]: Toolchain (without parser) took 238047.03 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 3.4 GB in the end (delta: -2.0 GB). Peak memory consumption was 603.4 MB. Max. memory is 7.1 GB. [2018-10-24 16:35:55,956 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:35:55,956 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1247.48 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-10-24 16:35:55,957 INFO L168 Benchmark]: Boogie Procedure Inliner took 411.26 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -869.8 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. [2018-10-24 16:35:55,958 INFO L168 Benchmark]: Boogie Preprocessor took 284.92 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 29.0 MB). Peak memory consumption was 29.0 MB. Max. memory is 7.1 GB. [2018-10-24 16:35:55,959 INFO L168 Benchmark]: RCFGBuilder took 8243.73 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 317.8 MB). Peak memory consumption was 317.8 MB. Max. memory is 7.1 GB. [2018-10-24 16:35:55,959 INFO L168 Benchmark]: TraceAbstraction took 227855.13 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.8 GB in the beginning and 3.4 GB in the end (delta: -1.6 GB). Peak memory consumption was 264.7 MB. Max. memory is 7.1 GB. [2018-10-24 16:35:55,966 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1247.48 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 411.26 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 756.0 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -869.8 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 284.92 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 29.0 MB). Peak memory consumption was 29.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8243.73 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 317.8 MB). Peak memory consumption was 317.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 227855.13 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 1.8 GB in the beginning and 3.4 GB in the end (delta: -1.6 GB). Peak memory consumption was 264.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 160]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 160). Cancelled while BasicCegarLoop was constructing difference of abstraction (14450states) and FLOYD_HOARE automaton (currently 101 states, 21 states before enhancement),while ReachableStatesComputation was computing reachable states (41930 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 425 locations, 1 error locations. TIMEOUT Result, 227.7s OverallTime, 15 OverallIterations, 5 TraceHistogramMax, 192.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3719 SDtfs, 34048 SDslu, 3645 SDs, 0 SdLazy, 78190 SolverSat, 6732 SolverUnsat, 22 SolverUnknown, 0 SolverNotchecked, 142.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4936 GetRequests, 4711 SyntacticMatches, 23 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4760 ImplicationChecksByTransitivity, 39.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14450occurred 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: 1.9s AutomataMinimizationTime, 14 MinimizatonAttempts, 35126 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 20.9s InterpolantComputationTime, 13262 NumberOfCodeBlocks, 13262 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 13240 ConstructedInterpolants, 398 QuantifiedInterpolants, 59504042 SizeOfPredicates, 9 NumberOfNonLiveVariables, 5365 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 22 InterpolantComputations, 11 PerfectInterpolantSequences, 12581/13847 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown