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/Problem13_label52_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:25:37,100 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:25:37,102 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:25:37,120 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:25:37,120 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:25:37,122 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:25:37,123 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:25:37,125 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:25:37,127 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:25:37,128 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:25:37,129 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:25:37,129 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:25:37,130 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:25:37,131 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:25:37,132 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:25:37,133 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:25:37,134 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:25:37,136 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:25:37,138 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:25:37,140 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:25:37,141 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:25:37,142 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:25:37,145 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 16:25:37,145 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 16:25:37,145 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 16:25:37,147 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 16:25:37,148 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 16:25:37,148 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 16:25:37,149 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 16:25:37,150 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 16:25:37,151 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 16:25:37,151 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 16:25:37,154 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 16:25:37,176 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:25:37,176 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:25:37,177 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:25:37,177 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:25:37,178 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:25:37,178 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:25:37,178 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:25:37,179 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:25:37,179 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:25:37,179 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:25:37,179 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:25:37,179 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:25:37,180 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:25:37,182 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:25:37,182 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:25:37,183 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:25:37,183 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:25:37,183 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:25:37,183 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:25:37,183 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:25:37,185 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:25:37,185 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:25:37,185 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:25:37,185 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:25:37,186 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:25:37,186 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:25:37,186 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:25:37,186 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:25:37,256 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:25:37,274 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:25:37,277 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:25:37,279 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:25:37,280 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:25:37,280 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label52_true-unreach-call.c [2018-10-24 16:25:37,338 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f5df5ab7f/5eca6e8e73cd4d338d78183209431575/FLAG6d18da419 [2018-10-24 16:25:38,115 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:25:38,116 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label52_true-unreach-call.c [2018-10-24 16:25:38,154 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f5df5ab7f/5eca6e8e73cd4d338d78183209431575/FLAG6d18da419 [2018-10-24 16:25:38,177 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f5df5ab7f/5eca6e8e73cd4d338d78183209431575 [2018-10-24 16:25:38,190 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:25:38,192 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:25:38,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:25:38,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:25:38,200 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:25:38,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:25:38" (1/1) ... [2018-10-24 16:25:38,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8de4687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:25:38, skipping insertion in model container [2018-10-24 16:25:38,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:25:38" (1/1) ... [2018-10-24 16:25:38,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:25:38,400 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:25:39,907 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:25:39,913 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:25:40,699 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:25:40,732 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:25:40,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:25:40 WrapperNode [2018-10-24 16:25:40,733 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:25:40,734 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:25:40,734 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:25:40,734 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:25:40,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:25:40" (1/1) ... [2018-10-24 16:25:40,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:25:40" (1/1) ... [2018-10-24 16:25:41,605 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:25:41,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:25:41,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:25:41,606 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:25:41,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:25:40" (1/1) ... [2018-10-24 16:25:41,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:25:40" (1/1) ... [2018-10-24 16:25:41,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:25:40" (1/1) ... [2018-10-24 16:25:41,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:25:40" (1/1) ... [2018-10-24 16:25:41,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:25:40" (1/1) ... [2018-10-24 16:25:42,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:25:40" (1/1) ... [2018-10-24 16:25:42,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:25:40" (1/1) ... [2018-10-24 16:25:42,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:25:42,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:25:42,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:25:42,234 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:25:42,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:25:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:25:42,303 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:25:42,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:25:42,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:25:54,873 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:25:54,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:25:54 BoogieIcfgContainer [2018-10-24 16:25:54,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:25:54,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:25:54,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:25:54,878 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:25:54,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:25:38" (1/3) ... [2018-10-24 16:25:54,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3634d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:25:54, skipping insertion in model container [2018-10-24 16:25:54,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:25:40" (2/3) ... [2018-10-24 16:25:54,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3634d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:25:54, skipping insertion in model container [2018-10-24 16:25:54,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:25:54" (3/3) ... [2018-10-24 16:25:54,882 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label52_true-unreach-call.c [2018-10-24 16:25:54,891 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:25:54,900 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:25:54,918 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:25:54,963 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:25:54,963 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:25:54,964 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:25:54,964 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:25:54,964 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:25:54,964 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:25:54,964 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:25:54,964 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:25:54,964 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:25:55,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states. [2018-10-24 16:25:55,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-24 16:25:55,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:25:55,023 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:25:55,026 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:25:55,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:25:55,033 INFO L82 PathProgramCache]: Analyzing trace with hash -2101344302, now seen corresponding path program 1 times [2018-10-24 16:25:55,035 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:25:55,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:25:55,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:25:55,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:25:55,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:25:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:25:55,580 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 16:25:55,583 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:25:55,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:25:55,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:25:55,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:25:55,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:25:55,610 INFO L87 Difference]: Start difference. First operand 1099 states. Second operand 4 states. [2018-10-24 16:26:13,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:26:13,536 INFO L93 Difference]: Finished difference Result 3870 states and 7276 transitions. [2018-10-24 16:26:13,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:26:13,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2018-10-24 16:26:13,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:26:13,588 INFO L225 Difference]: With dead ends: 3870 [2018-10-24 16:26:13,589 INFO L226 Difference]: Without dead ends: 2764 [2018-10-24 16:26:13,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 16:26:13,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2018-10-24 16:26:13,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2736. [2018-10-24 16:26:13,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2736 states. [2018-10-24 16:26:13,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 4487 transitions. [2018-10-24 16:26:13,757 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 4487 transitions. Word has length 65 [2018-10-24 16:26:13,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:26:13,758 INFO L481 AbstractCegarLoop]: Abstraction has 2736 states and 4487 transitions. [2018-10-24 16:26:13,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:26:13,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 4487 transitions. [2018-10-24 16:26:13,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-24 16:26:13,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:26:13,767 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 16:26:13,767 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:26:13,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:26:13,768 INFO L82 PathProgramCache]: Analyzing trace with hash -94143251, now seen corresponding path program 1 times [2018-10-24 16:26:13,768 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:26:13,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:26:13,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:26:13,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:26:13,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:26:13,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:26:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:26:14,661 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:26:14,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:26:14,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:26:14,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:26:14,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:26:14,664 INFO L87 Difference]: Start difference. First operand 2736 states and 4487 transitions. Second operand 5 states. [2018-10-24 16:26:14,908 WARN L179 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-24 16:26:33,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:26:33,164 INFO L93 Difference]: Finished difference Result 9428 states and 14930 transitions. [2018-10-24 16:26:33,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:26:33,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 171 [2018-10-24 16:26:33,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:26:33,198 INFO L225 Difference]: With dead ends: 9428 [2018-10-24 16:26:33,199 INFO L226 Difference]: Without dead ends: 6694 [2018-10-24 16:26:33,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 16:26:33,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6694 states. [2018-10-24 16:26:33,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6694 to 6693. [2018-10-24 16:26:33,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6693 states. [2018-10-24 16:26:33,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6693 states to 6693 states and 9417 transitions. [2018-10-24 16:26:33,334 INFO L78 Accepts]: Start accepts. Automaton has 6693 states and 9417 transitions. Word has length 171 [2018-10-24 16:26:33,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:26:33,335 INFO L481 AbstractCegarLoop]: Abstraction has 6693 states and 9417 transitions. [2018-10-24 16:26:33,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:26:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 6693 states and 9417 transitions. [2018-10-24 16:26:33,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-10-24 16:26:33,340 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:26:33,341 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 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 16:26:33,341 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:26:33,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:26:33,341 INFO L82 PathProgramCache]: Analyzing trace with hash -548333772, now seen corresponding path program 1 times [2018-10-24 16:26:33,342 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:26:33,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:26:33,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:26:33,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:26:33,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:26:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:26:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:26:33,658 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:26:33,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:26:33,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:26:33,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:26:33,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:26:33,660 INFO L87 Difference]: Start difference. First operand 6693 states and 9417 transitions. Second operand 4 states. [2018-10-24 16:26:46,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:26:46,143 INFO L93 Difference]: Finished difference Result 16580 states and 24509 transitions. [2018-10-24 16:26:46,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:26:46,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 241 [2018-10-24 16:26:46,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:26:46,192 INFO L225 Difference]: With dead ends: 16580 [2018-10-24 16:26:46,193 INFO L226 Difference]: Without dead ends: 10677 [2018-10-24 16:26:46,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 16:26:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10677 states. [2018-10-24 16:26:46,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10677 to 10651. [2018-10-24 16:26:46,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10651 states. [2018-10-24 16:26:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10651 states to 10651 states and 14740 transitions. [2018-10-24 16:26:46,402 INFO L78 Accepts]: Start accepts. Automaton has 10651 states and 14740 transitions. Word has length 241 [2018-10-24 16:26:46,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:26:46,403 INFO L481 AbstractCegarLoop]: Abstraction has 10651 states and 14740 transitions. [2018-10-24 16:26:46,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:26:46,403 INFO L276 IsEmpty]: Start isEmpty. Operand 10651 states and 14740 transitions. [2018-10-24 16:26:46,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-10-24 16:26:46,407 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:26:46,408 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:26:46,408 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:26:46,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:26:46,409 INFO L82 PathProgramCache]: Analyzing trace with hash -426676326, now seen corresponding path program 1 times [2018-10-24 16:26:46,409 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:26:46,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:26:46,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:26:46,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:26:46,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:26:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:26:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:26:46,932 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:26:46,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:26:46,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:26:46,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:26:46,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:26:46,934 INFO L87 Difference]: Start difference. First operand 10651 states and 14740 transitions. Second operand 5 states. [2018-10-24 16:27:08,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:27:08,186 INFO L93 Difference]: Finished difference Result 45250 states and 64108 transitions. [2018-10-24 16:27:08,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:27:08,187 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 248 [2018-10-24 16:27:08,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:27:08,283 INFO L225 Difference]: With dead ends: 45250 [2018-10-24 16:27:08,283 INFO L226 Difference]: Without dead ends: 35389 [2018-10-24 16:27:08,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:27:08,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35389 states. [2018-10-24 16:27:08,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35389 to 35205. [2018-10-24 16:27:08,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35205 states. [2018-10-24 16:27:08,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35205 states to 35205 states and 46382 transitions. [2018-10-24 16:27:08,946 INFO L78 Accepts]: Start accepts. Automaton has 35205 states and 46382 transitions. Word has length 248 [2018-10-24 16:27:08,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:27:08,947 INFO L481 AbstractCegarLoop]: Abstraction has 35205 states and 46382 transitions. [2018-10-24 16:27:08,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:27:08,947 INFO L276 IsEmpty]: Start isEmpty. Operand 35205 states and 46382 transitions. [2018-10-24 16:27:08,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-10-24 16:27:08,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:27:08,958 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:27:08,959 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:27:08,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:27:08,959 INFO L82 PathProgramCache]: Analyzing trace with hash 376928919, now seen corresponding path program 1 times [2018-10-24 16:27:08,960 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:27:08,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:27:08,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:08,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:27:08,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:27:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 125 proven. 4 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-10-24 16:27:09,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:27:09,359 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:27:09,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:27:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:27:09,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:27:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:27:09,671 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:27:09,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-24 16:27:09,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:27:09,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:27:09,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:27:09,674 INFO L87 Difference]: Start difference. First operand 35205 states and 46382 transitions. Second operand 4 states. [2018-10-24 16:27:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:27:24,295 INFO L93 Difference]: Finished difference Result 131138 states and 173970 transitions. [2018-10-24 16:27:24,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:27:24,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 271 [2018-10-24 16:27:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:27:24,472 INFO L225 Difference]: With dead ends: 131138 [2018-10-24 16:27:24,473 INFO L226 Difference]: Without dead ends: 96723 [2018-10-24 16:27:24,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:27:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96723 states. [2018-10-24 16:27:26,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96723 to 65932. [2018-10-24 16:27:26,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65932 states. [2018-10-24 16:27:26,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65932 states to 65932 states and 82042 transitions. [2018-10-24 16:27:26,230 INFO L78 Accepts]: Start accepts. Automaton has 65932 states and 82042 transitions. Word has length 271 [2018-10-24 16:27:26,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:27:26,231 INFO L481 AbstractCegarLoop]: Abstraction has 65932 states and 82042 transitions. [2018-10-24 16:27:26,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:27:26,231 INFO L276 IsEmpty]: Start isEmpty. Operand 65932 states and 82042 transitions. [2018-10-24 16:27:26,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-10-24 16:27:26,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:27:26,242 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:27:26,242 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:27:26,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:27:26,243 INFO L82 PathProgramCache]: Analyzing trace with hash -754955645, now seen corresponding path program 1 times [2018-10-24 16:27:26,243 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:27:26,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:27:26,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:26,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:27:26,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:27:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 125 proven. 4 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-10-24 16:27:26,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:27:26,690 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 16:27:26,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:27:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:27:26,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:27:26,885 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:27:26,918 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:27:26,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-24 16:27:26,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:27:26,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:27:26,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:27:26,921 INFO L87 Difference]: Start difference. First operand 65932 states and 82042 transitions. Second operand 4 states. [2018-10-24 16:27:39,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:27:39,219 INFO L93 Difference]: Finished difference Result 218599 states and 271324 transitions. [2018-10-24 16:27:39,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:27:39,222 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 277 [2018-10-24 16:27:39,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:27:40,121 INFO L225 Difference]: With dead ends: 218599 [2018-10-24 16:27:40,121 INFO L226 Difference]: Without dead ends: 153457 [2018-10-24 16:27:40,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:27:40,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153457 states. [2018-10-24 16:27:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153457 to 117150. [2018-10-24 16:27:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117150 states. [2018-10-24 16:27:41,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117150 states to 117150 states and 141003 transitions. [2018-10-24 16:27:41,720 INFO L78 Accepts]: Start accepts. Automaton has 117150 states and 141003 transitions. Word has length 277 [2018-10-24 16:27:41,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:27:41,721 INFO L481 AbstractCegarLoop]: Abstraction has 117150 states and 141003 transitions. [2018-10-24 16:27:41,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:27:41,721 INFO L276 IsEmpty]: Start isEmpty. Operand 117150 states and 141003 transitions. [2018-10-24 16:27:41,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-10-24 16:27:41,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:27:41,735 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:27:41,735 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:27:41,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:27:41,736 INFO L82 PathProgramCache]: Analyzing trace with hash -290752210, now seen corresponding path program 1 times [2018-10-24 16:27:41,736 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:27:41,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:27:41,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:41,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:27:41,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:27:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:27:41,982 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:27:41,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:27:41,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:27:41,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:27:41,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:27:41,984 INFO L87 Difference]: Start difference. First operand 117150 states and 141003 transitions. Second operand 3 states. [2018-10-24 16:27:49,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:27:49,822 INFO L93 Difference]: Finished difference Result 234279 states and 281833 transitions. [2018-10-24 16:27:49,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:27:49,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 306 [2018-10-24 16:27:49,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:27:49,992 INFO L225 Difference]: With dead ends: 234279 [2018-10-24 16:27:49,993 INFO L226 Difference]: Without dead ends: 117919 [2018-10-24 16:27:50,054 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 16:27:50,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117919 states. [2018-10-24 16:27:51,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117919 to 115549. [2018-10-24 16:27:51,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115549 states. [2018-10-24 16:27:51,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115549 states to 115549 states and 131264 transitions. [2018-10-24 16:27:51,134 INFO L78 Accepts]: Start accepts. Automaton has 115549 states and 131264 transitions. Word has length 306 [2018-10-24 16:27:51,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:27:51,135 INFO L481 AbstractCegarLoop]: Abstraction has 115549 states and 131264 transitions. [2018-10-24 16:27:51,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:27:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 115549 states and 131264 transitions. [2018-10-24 16:27:51,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2018-10-24 16:27:51,152 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:27:51,153 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:27:51,153 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:27:51,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:27:51,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1963740964, now seen corresponding path program 1 times [2018-10-24 16:27:51,153 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:27:51,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:27:51,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:51,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:27:51,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:27:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:27:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2018-10-24 16:27:51,496 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:27:51,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:27:51,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:27:51,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:27:51,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:27:51,497 INFO L87 Difference]: Start difference. First operand 115549 states and 131264 transitions. Second operand 4 states. [2018-10-24 16:28:03,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:28:03,018 INFO L93 Difference]: Finished difference Result 314593 states and 358214 transitions. [2018-10-24 16:28:03,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:28:03,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 345 [2018-10-24 16:28:03,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:28:03,270 INFO L225 Difference]: With dead ends: 314593 [2018-10-24 16:28:03,270 INFO L226 Difference]: Without dead ends: 193510 [2018-10-24 16:28:03,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:28:03,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193510 states. [2018-10-24 16:28:04,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193510 to 183256. [2018-10-24 16:28:04,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183256 states. [2018-10-24 16:28:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183256 states to 183256 states and 201515 transitions. [2018-10-24 16:28:04,984 INFO L78 Accepts]: Start accepts. Automaton has 183256 states and 201515 transitions. Word has length 345 [2018-10-24 16:28:04,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:28:04,984 INFO L481 AbstractCegarLoop]: Abstraction has 183256 states and 201515 transitions. [2018-10-24 16:28:04,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:28:04,984 INFO L276 IsEmpty]: Start isEmpty. Operand 183256 states and 201515 transitions. [2018-10-24 16:28:04,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-24 16:28:04,995 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:28:04,996 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:28:04,996 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:28:04,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:28:04,996 INFO L82 PathProgramCache]: Analyzing trace with hash -684285286, now seen corresponding path program 1 times [2018-10-24 16:28:04,997 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:28:04,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:28:04,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:04,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:04,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:05,360 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-24 16:28:06,512 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 464 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-10-24 16:28:06,512 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:28:06,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:28:06,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:28:06,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:28:06,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:28:06,514 INFO L87 Difference]: Start difference. First operand 183256 states and 201515 transitions. Second operand 4 states. [2018-10-24 16:28:19,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:28:19,173 INFO L93 Difference]: Finished difference Result 375967 states and 412913 transitions. [2018-10-24 16:28:19,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:28:19,173 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 423 [2018-10-24 16:28:19,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:28:20,612 INFO L225 Difference]: With dead ends: 375967 [2018-10-24 16:28:20,612 INFO L226 Difference]: Without dead ends: 174537 [2018-10-24 16:28:20,690 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 16:28:20,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174537 states. [2018-10-24 16:28:22,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174537 to 166656. [2018-10-24 16:28:22,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166656 states. [2018-10-24 16:28:22,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166656 states to 166656 states and 181790 transitions. [2018-10-24 16:28:22,275 INFO L78 Accepts]: Start accepts. Automaton has 166656 states and 181790 transitions. Word has length 423 [2018-10-24 16:28:22,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:28:22,275 INFO L481 AbstractCegarLoop]: Abstraction has 166656 states and 181790 transitions. [2018-10-24 16:28:22,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:28:22,276 INFO L276 IsEmpty]: Start isEmpty. Operand 166656 states and 181790 transitions. [2018-10-24 16:28:22,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2018-10-24 16:28:22,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:28:22,286 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, 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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:28:22,287 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:28:22,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:28:22,287 INFO L82 PathProgramCache]: Analyzing trace with hash -191071304, now seen corresponding path program 1 times [2018-10-24 16:28:22,287 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:28:22,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:28:22,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:22,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:22,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:22,934 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2018-10-24 16:28:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 545 proven. 5 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-10-24 16:28:23,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:28:23,169 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:28:24,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:24,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:28:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2018-10-24 16:28:24,588 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:28:24,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2018-10-24 16:28:24,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 16:28:24,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 16:28:24,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:28:24,591 INFO L87 Difference]: Start difference. First operand 166656 states and 181790 transitions. Second operand 8 states. [2018-10-24 16:28:45,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:28:45,912 INFO L93 Difference]: Finished difference Result 334240 states and 364395 transitions. [2018-10-24 16:28:45,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 16:28:45,913 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 484 [2018-10-24 16:28:45,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:28:46,121 INFO L225 Difference]: With dead ends: 334240 [2018-10-24 16:28:46,121 INFO L226 Difference]: Without dead ends: 164406 [2018-10-24 16:28:46,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 490 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:28:46,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164406 states. [2018-10-24 16:28:47,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164406 to 150074. [2018-10-24 16:28:47,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150074 states. [2018-10-24 16:28:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150074 states to 150074 states and 159069 transitions. [2018-10-24 16:28:47,427 INFO L78 Accepts]: Start accepts. Automaton has 150074 states and 159069 transitions. Word has length 484 [2018-10-24 16:28:47,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:28:47,428 INFO L481 AbstractCegarLoop]: Abstraction has 150074 states and 159069 transitions. [2018-10-24 16:28:47,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 16:28:47,428 INFO L276 IsEmpty]: Start isEmpty. Operand 150074 states and 159069 transitions. [2018-10-24 16:28:47,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2018-10-24 16:28:47,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:28:47,442 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:28:47,442 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:28:47,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:28:47,442 INFO L82 PathProgramCache]: Analyzing trace with hash 631833238, now seen corresponding path program 1 times [2018-10-24 16:28:47,442 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:28:47,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:28:47,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:47,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:28:47,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:28:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:28:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 567 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-10-24 16:28:48,526 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:28:48,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:28:48,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:28:48,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:28:48,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:28:48,527 INFO L87 Difference]: Start difference. First operand 150074 states and 159069 transitions. Second operand 4 states. [2018-10-24 16:28:59,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:28:59,330 INFO L93 Difference]: Finished difference Result 301741 states and 319785 transitions. [2018-10-24 16:28:59,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:28:59,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 545 [2018-10-24 16:28:59,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:28:59,505 INFO L225 Difference]: With dead ends: 301741 [2018-10-24 16:28:59,506 INFO L226 Difference]: Without dead ends: 150085 [2018-10-24 16:28:59,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 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 16:28:59,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150085 states. [2018-10-24 16:29:00,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150085 to 146123. [2018-10-24 16:29:00,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146123 states. [2018-10-24 16:29:00,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146123 states to 146123 states and 152737 transitions. [2018-10-24 16:29:00,712 INFO L78 Accepts]: Start accepts. Automaton has 146123 states and 152737 transitions. Word has length 545 [2018-10-24 16:29:00,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:29:00,713 INFO L481 AbstractCegarLoop]: Abstraction has 146123 states and 152737 transitions. [2018-10-24 16:29:00,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:29:00,714 INFO L276 IsEmpty]: Start isEmpty. Operand 146123 states and 152737 transitions. [2018-10-24 16:29:00,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2018-10-24 16:29:00,731 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:29:00,732 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:29:00,732 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:29:00,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:29:00,733 INFO L82 PathProgramCache]: Analyzing trace with hash -358337608, now seen corresponding path program 1 times [2018-10-24 16:29:00,733 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:29:00,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:29:00,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:29:00,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:29:00,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:29:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:29:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2018-10-24 16:29:05,095 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:29:05,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 16:29:05,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:29:05,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:29:05,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:29:05,097 INFO L87 Difference]: Start difference. First operand 146123 states and 152737 transitions. Second operand 3 states. [2018-10-24 16:29:09,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:29:09,464 INFO L93 Difference]: Finished difference Result 289868 states and 302920 transitions. [2018-10-24 16:29:09,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:29:09,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 555 [2018-10-24 16:29:09,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:29:09,612 INFO L225 Difference]: With dead ends: 289868 [2018-10-24 16:29:09,613 INFO L226 Difference]: Without dead ends: 144533 [2018-10-24 16:29:09,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 16:29:09,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144533 states. [2018-10-24 16:29:11,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144533 to 144533. [2018-10-24 16:29:11,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144533 states. [2018-10-24 16:29:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144533 states to 144533 states and 150960 transitions. [2018-10-24 16:29:11,383 INFO L78 Accepts]: Start accepts. Automaton has 144533 states and 150960 transitions. Word has length 555 [2018-10-24 16:29:11,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:29:11,383 INFO L481 AbstractCegarLoop]: Abstraction has 144533 states and 150960 transitions. [2018-10-24 16:29:11,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:29:11,384 INFO L276 IsEmpty]: Start isEmpty. Operand 144533 states and 150960 transitions. [2018-10-24 16:29:11,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2018-10-24 16:29:11,399 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:29:11,399 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:29:11,400 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:29:11,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:29:11,400 INFO L82 PathProgramCache]: Analyzing trace with hash -360480820, now seen corresponding path program 1 times [2018-10-24 16:29:11,400 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:29:11,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:29:11,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:29:11,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:29:11,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:29:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:29:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 567 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-10-24 16:29:12,011 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:29:12,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:29:12,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:29:12,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:29:12,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:29:12,012 INFO L87 Difference]: Start difference. First operand 144533 states and 150960 transitions. Second operand 4 states. [2018-10-24 16:29:25,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:29:25,152 INFO L93 Difference]: Finished difference Result 319074 states and 333655 transitions. [2018-10-24 16:29:25,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:29:25,153 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 568 [2018-10-24 16:29:25,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:29:25,346 INFO L225 Difference]: With dead ends: 319074 [2018-10-24 16:29:25,347 INFO L226 Difference]: Without dead ends: 175331 [2018-10-24 16:29:25,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:29:25,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175331 states. [2018-10-24 16:29:27,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175331 to 170548. [2018-10-24 16:29:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170548 states. [2018-10-24 16:29:27,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170548 states to 170548 states and 177643 transitions. [2018-10-24 16:29:27,538 INFO L78 Accepts]: Start accepts. Automaton has 170548 states and 177643 transitions. Word has length 568 [2018-10-24 16:29:27,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:29:27,539 INFO L481 AbstractCegarLoop]: Abstraction has 170548 states and 177643 transitions. [2018-10-24 16:29:27,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:29:27,539 INFO L276 IsEmpty]: Start isEmpty. Operand 170548 states and 177643 transitions. [2018-10-24 16:29:27,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 737 [2018-10-24 16:29:27,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:29:27,561 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:29:27,561 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:29:27,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:29:27,562 INFO L82 PathProgramCache]: Analyzing trace with hash 370358925, now seen corresponding path program 1 times [2018-10-24 16:29:27,562 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:29:27,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:29:27,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:29:27,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:29:27,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:29:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-24 16:29:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 993 proven. 16 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-10-24 16:29:28,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:29:28,694 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 16:29:28,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:29:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:29:28,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:29:28,952 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-24 16:29:29,153 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 16:29:29,153 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:29:29,159 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:29:29,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:29:29 BoogieIcfgContainer [2018-10-24 16:29:29,159 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:29:29,160 INFO L168 Benchmark]: Toolchain (without parser) took 230969.36 ms. Allocated memory was 1.5 GB in the beginning and 4.7 GB in the end (delta: 3.1 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -832.1 MB). Peak memory consumption was 2.3 GB. Max. memory is 7.1 GB. [2018-10-24 16:29:29,162 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:29:29,164 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2539.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. [2018-10-24 16:29:29,165 INFO L168 Benchmark]: Boogie Procedure Inliner took 871.61 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 843.1 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 83.7 MB. Max. memory is 7.1 GB. [2018-10-24 16:29:29,166 INFO L168 Benchmark]: Boogie Preprocessor took 627.73 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 80.5 MB). Peak memory consumption was 80.5 MB. Max. memory is 7.1 GB. [2018-10-24 16:29:29,167 INFO L168 Benchmark]: RCFGBuilder took 12640.01 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 219.2 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 40.7 MB). Peak memory consumption was 575.1 MB. Max. memory is 7.1 GB. [2018-10-24 16:29:29,169 INFO L168 Benchmark]: TraceAbstraction took 214284.46 ms. Allocated memory was 2.6 GB in the beginning and 4.7 GB in the end (delta: 2.0 GB). Free memory was 2.1 GB in the beginning and 2.3 GB in the end (delta: -166.0 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. [2018-10-24 16:29:29,179 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2539.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 253.7 MB). Peak memory consumption was 253.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 871.61 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 843.1 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 83.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 627.73 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 80.5 MB). Peak memory consumption was 80.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 12640.01 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 219.2 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 40.7 MB). Peak memory consumption was 575.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 214284.46 ms. Allocated memory was 2.6 GB in the beginning and 4.7 GB in the end (delta: 2.0 GB). Free memory was 2.1 GB in the beginning and 2.3 GB in the end (delta: -166.0 MB). Peak memory consumption was 1.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 204]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 204). Cancelled while BasicCegarLoop was analyzing trace of length 737 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 4 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 1099 locations, 1 error locations. TIMEOUT Result, 214.2s OverallTime, 14 OverallIterations, 6 TraceHistogramMax, 183.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 9814 SDtfs, 36691 SDslu, 3272 SDs, 0 SdLazy, 64881 SolverSat, 17663 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 147.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1095 GetRequests, 1052 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=183256occurred in iteration=8, 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: 14.8s AutomataMinimizationTime, 13 MinimizatonAttempts, 110919 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 5531 NumberOfCodeBlocks, 5531 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 5515 ConstructedInterpolants, 0 QuantifiedInterpolants, 5672512 SizeOfPredicates, 2 NumberOfNonLiveVariables, 1368 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 16 InterpolantComputations, 13 PerfectInterpolantSequences, 6773/6786 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown