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/loops/n.c24_false-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 11:45:02,077 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 11:45:02,079 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 11:45:02,092 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 11:45:02,092 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 11:45:02,093 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 11:45:02,095 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 11:45:02,096 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 11:45:02,098 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 11:45:02,099 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 11:45:02,100 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 11:45:02,100 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 11:45:02,101 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 11:45:02,102 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 11:45:02,104 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 11:45:02,104 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 11:45:02,105 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 11:45:02,107 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 11:45:02,109 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 11:45:02,111 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 11:45:02,112 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 11:45:02,114 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 11:45:02,116 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 11:45:02,116 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 11:45:02,116 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 11:45:02,117 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 11:45:02,118 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 11:45:02,119 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 11:45:02,120 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 11:45:02,122 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 11:45:02,122 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 11:45:02,123 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 11:45:02,127 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 11:45:02,142 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 11:45:02,142 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 11:45:02,143 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 11:45:02,143 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 11:45:02,144 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 11:45:02,144 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 11:45:02,144 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 11:45:02,145 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 11:45:02,145 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 11:45:02,145 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 11:45:02,145 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 11:45:02,146 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 11:45:02,146 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 11:45:02,146 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 11:45:02,146 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 11:45:02,146 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 11:45:02,147 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 11:45:02,147 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 11:45:02,147 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 11:45:02,147 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:45:02,148 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 11:45:02,148 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 11:45:02,148 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 11:45:02,148 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 11:45:02,148 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 11:45:02,149 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 11:45:02,149 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 11:45:02,149 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 11:45:02,197 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 11:45:02,211 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 11:45:02,215 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 11:45:02,216 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 11:45:02,216 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 11:45:02,217 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/n.c24_false-unreach-call.i [2018-10-24 11:45:02,275 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/11bc43019/ef424a40df384a61bedbbe50c7db7702/FLAGc76a61d41 [2018-10-24 11:45:02,797 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 11:45:02,798 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24_false-unreach-call.i [2018-10-24 11:45:02,814 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/11bc43019/ef424a40df384a61bedbbe50c7db7702/FLAGc76a61d41 [2018-10-24 11:45:02,835 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/11bc43019/ef424a40df384a61bedbbe50c7db7702 [2018-10-24 11:45:02,847 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 11:45:02,849 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 11:45:02,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 11:45:02,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 11:45:02,856 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 11:45:02,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:45:02" (1/1) ... [2018-10-24 11:45:02,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6453d780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:02, skipping insertion in model container [2018-10-24 11:45:02,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:45:02" (1/1) ... [2018-10-24 11:45:02,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 11:45:02,911 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 11:45:03,154 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:45:03,164 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 11:45:03,202 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:45:03,246 INFO L193 MainTranslator]: Completed translation [2018-10-24 11:45:03,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03 WrapperNode [2018-10-24 11:45:03,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 11:45:03,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 11:45:03,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 11:45:03,249 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 11:45:03,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (1/1) ... [2018-10-24 11:45:03,272 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (1/1) ... [2018-10-24 11:45:03,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 11:45:03,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 11:45:03,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 11:45:03,304 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 11:45:03,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (1/1) ... [2018-10-24 11:45:03,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (1/1) ... [2018-10-24 11:45:03,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (1/1) ... [2018-10-24 11:45:03,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (1/1) ... [2018-10-24 11:45:03,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (1/1) ... [2018-10-24 11:45:03,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (1/1) ... [2018-10-24 11:45:03,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (1/1) ... [2018-10-24 11:45:03,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 11:45:03,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 11:45:03,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 11:45:03,338 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 11:45:03,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (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 11:45:03,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-10-24 11:45:03,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-10-24 11:45:03,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-10-24 11:45:03,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-10-24 11:45:03,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 11:45:03,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 11:45:04,127 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 11:45:04,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:45:04 BoogieIcfgContainer [2018-10-24 11:45:04,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 11:45:04,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 11:45:04,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 11:45:04,132 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 11:45:04,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:45:02" (1/3) ... [2018-10-24 11:45:04,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f120c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:45:04, skipping insertion in model container [2018-10-24 11:45:04,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:45:03" (2/3) ... [2018-10-24 11:45:04,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f120c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:45:04, skipping insertion in model container [2018-10-24 11:45:04,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:45:04" (3/3) ... [2018-10-24 11:45:04,136 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c24_false-unreach-call.i [2018-10-24 11:45:04,146 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 11:45:04,153 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 11:45:04,167 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 11:45:04,197 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 11:45:04,198 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 11:45:04,198 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 11:45:04,198 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 11:45:04,198 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 11:45:04,199 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 11:45:04,199 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 11:45:04,199 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 11:45:04,199 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 11:45:04,216 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2018-10-24 11:45:04,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-24 11:45:04,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:04,223 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:04,225 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:04,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:04,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1335915765, now seen corresponding path program 1 times [2018-10-24 11:45:04,233 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:04,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:04,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:04,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:04,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:04,374 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 11:45:04,377 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:45:04,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 11:45:04,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 11:45:04,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 11:45:04,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:45:04,398 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 2 states. [2018-10-24 11:45:04,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:04,421 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2018-10-24 11:45:04,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 11:45:04,423 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-10-24 11:45:04,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:04,439 INFO L225 Difference]: With dead ends: 121 [2018-10-24 11:45:04,440 INFO L226 Difference]: Without dead ends: 46 [2018-10-24 11:45:04,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:45:04,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-24 11:45:04,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-24 11:45:04,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-24 11:45:04,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2018-10-24 11:45:04,499 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 12 [2018-10-24 11:45:04,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:04,499 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2018-10-24 11:45:04,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 11:45:04,500 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2018-10-24 11:45:04,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-24 11:45:04,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:04,501 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:04,501 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:04,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:04,501 INFO L82 PathProgramCache]: Analyzing trace with hash -941920070, now seen corresponding path program 1 times [2018-10-24 11:45:04,502 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:04,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:04,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:04,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:04,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:04,628 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 11:45:04,628 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:45:04,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 11:45:04,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 11:45:04,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 11:45:04,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:45:04,634 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 3 states. [2018-10-24 11:45:04,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:04,940 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2018-10-24 11:45:04,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 11:45:04,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2018-10-24 11:45:04,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:04,943 INFO L225 Difference]: With dead ends: 116 [2018-10-24 11:45:04,943 INFO L226 Difference]: Without dead ends: 81 [2018-10-24 11:45:04,944 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 11:45:04,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-24 11:45:04,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 50. [2018-10-24 11:45:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-24 11:45:04,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2018-10-24 11:45:04,953 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 14 [2018-10-24 11:45:04,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:04,954 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2018-10-24 11:45:04,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 11:45:04,954 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2018-10-24 11:45:04,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-24 11:45:04,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:04,955 INFO L375 BasicCegarLoop]: trace histogram [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 11:45:04,955 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:04,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:04,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1195205568, now seen corresponding path program 1 times [2018-10-24 11:45:04,956 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:04,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:04,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:04,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:04,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-24 11:45:05,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:05,080 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 11:45:05,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:05,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-24 11:45:05,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:05,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-10-24 11:45:05,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 11:45:05,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 11:45:05,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:45:05,275 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 5 states. [2018-10-24 11:45:05,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:05,514 INFO L93 Difference]: Finished difference Result 153 states and 188 transitions. [2018-10-24 11:45:05,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 11:45:05,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2018-10-24 11:45:05,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:05,517 INFO L225 Difference]: With dead ends: 153 [2018-10-24 11:45:05,517 INFO L226 Difference]: Without dead ends: 116 [2018-10-24 11:45:05,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:45:05,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-24 11:45:05,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 85. [2018-10-24 11:45:05,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-24 11:45:05,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2018-10-24 11:45:05,529 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 26 [2018-10-24 11:45:05,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:05,530 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2018-10-24 11:45:05,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 11:45:05,530 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2018-10-24 11:45:05,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-24 11:45:05,532 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:05,532 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:05,533 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:05,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:05,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1007643258, now seen corresponding path program 2 times [2018-10-24 11:45:05,533 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:05,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:05,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:05,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:05,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-10-24 11:45:05,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:05,697 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 11:45:05,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:45:05,768 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:45:05,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:05,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-10-24 11:45:05,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:05,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-10-24 11:45:05,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 11:45:05,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 11:45:05,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-24 11:45:05,901 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand 6 states. [2018-10-24 11:45:06,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:06,105 INFO L93 Difference]: Finished difference Result 218 states and 269 transitions. [2018-10-24 11:45:06,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 11:45:06,106 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2018-10-24 11:45:06,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:06,109 INFO L225 Difference]: With dead ends: 218 [2018-10-24 11:45:06,109 INFO L226 Difference]: Without dead ends: 151 [2018-10-24 11:45:06,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-24 11:45:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-24 11:45:06,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2018-10-24 11:45:06,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-24 11:45:06,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 145 transitions. [2018-10-24 11:45:06,123 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 145 transitions. Word has length 38 [2018-10-24 11:45:06,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:06,124 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 145 transitions. [2018-10-24 11:45:06,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 11:45:06,124 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 145 transitions. [2018-10-24 11:45:06,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-24 11:45:06,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:06,126 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:06,126 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:06,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:06,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1752511744, now seen corresponding path program 3 times [2018-10-24 11:45:06,127 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:06,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:06,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:06,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:06,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-10-24 11:45:06,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:06,259 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 11:45:06,276 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:45:06,312 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-24 11:45:06,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:06,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-10-24 11:45:06,616 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 11:45:06,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2018-10-24 11:45:06,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 11:45:06,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 11:45:06,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:45:06,620 INFO L87 Difference]: Start difference. First operand 120 states and 145 transitions. Second operand 8 states. [2018-10-24 11:45:07,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:07,446 INFO L93 Difference]: Finished difference Result 431 states and 540 transitions. [2018-10-24 11:45:07,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 11:45:07,447 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2018-10-24 11:45:07,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:07,450 INFO L225 Difference]: With dead ends: 431 [2018-10-24 11:45:07,450 INFO L226 Difference]: Without dead ends: 332 [2018-10-24 11:45:07,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:45:07,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2018-10-24 11:45:07,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 157. [2018-10-24 11:45:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-24 11:45:07,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 191 transitions. [2018-10-24 11:45:07,471 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 191 transitions. Word has length 50 [2018-10-24 11:45:07,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:07,471 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 191 transitions. [2018-10-24 11:45:07,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 11:45:07,472 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 191 transitions. [2018-10-24 11:45:07,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-24 11:45:07,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:07,475 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:07,475 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:07,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:07,476 INFO L82 PathProgramCache]: Analyzing trace with hash -945187393, now seen corresponding path program 1 times [2018-10-24 11:45:07,476 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:07,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:07,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:07,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:07,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-10-24 11:45:07,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:07,647 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 11:45:07,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:07,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-10-24 11:45:07,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:07,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-10-24 11:45:07,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 11:45:07,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 11:45:07,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:45:07,794 INFO L87 Difference]: Start difference. First operand 157 states and 191 transitions. Second operand 8 states. [2018-10-24 11:45:08,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:08,057 INFO L93 Difference]: Finished difference Result 363 states and 450 transitions. [2018-10-24 11:45:08,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 11:45:08,057 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2018-10-24 11:45:08,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:08,059 INFO L225 Difference]: With dead ends: 363 [2018-10-24 11:45:08,059 INFO L226 Difference]: Without dead ends: 234 [2018-10-24 11:45:08,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:45:08,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-24 11:45:08,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 192. [2018-10-24 11:45:08,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-24 11:45:08,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 234 transitions. [2018-10-24 11:45:08,084 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 234 transitions. Word has length 72 [2018-10-24 11:45:08,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:08,084 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 234 transitions. [2018-10-24 11:45:08,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 11:45:08,085 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 234 transitions. [2018-10-24 11:45:08,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-24 11:45:08,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:08,089 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:08,089 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:08,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:08,089 INFO L82 PathProgramCache]: Analyzing trace with hash -694455227, now seen corresponding path program 2 times [2018-10-24 11:45:08,090 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:08,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:08,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:08,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:08,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-10-24 11:45:08,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:08,527 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 11:45:08,535 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:45:08,598 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:45:08,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:08,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-10-24 11:45:08,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:08,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-10-24 11:45:08,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 11:45:08,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 11:45:08,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:45:08,768 INFO L87 Difference]: Start difference. First operand 192 states and 234 transitions. Second operand 9 states. [2018-10-24 11:45:09,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:09,047 INFO L93 Difference]: Finished difference Result 428 states and 531 transitions. [2018-10-24 11:45:09,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 11:45:09,048 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2018-10-24 11:45:09,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:09,050 INFO L225 Difference]: With dead ends: 428 [2018-10-24 11:45:09,050 INFO L226 Difference]: Without dead ends: 269 [2018-10-24 11:45:09,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:45:09,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-10-24 11:45:09,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 227. [2018-10-24 11:45:09,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-24 11:45:09,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 277 transitions. [2018-10-24 11:45:09,066 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 277 transitions. Word has length 84 [2018-10-24 11:45:09,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:09,067 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 277 transitions. [2018-10-24 11:45:09,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 11:45:09,067 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 277 transitions. [2018-10-24 11:45:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-24 11:45:09,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:09,072 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:09,072 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:09,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:09,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1401618561, now seen corresponding path program 3 times [2018-10-24 11:45:09,073 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:09,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:09,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:09,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:09,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2018-10-24 11:45:09,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:09,258 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 11:45:09,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:45:09,304 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-24 11:45:09,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:09,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2018-10-24 11:45:09,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:09,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2018-10-24 11:45:09,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 11:45:09,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 11:45:09,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:45:09,451 INFO L87 Difference]: Start difference. First operand 227 states and 277 transitions. Second operand 13 states. [2018-10-24 11:45:11,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:11,165 INFO L93 Difference]: Finished difference Result 947 states and 1193 transitions. [2018-10-24 11:45:11,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-24 11:45:11,165 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2018-10-24 11:45:11,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:11,170 INFO L225 Difference]: With dead ends: 947 [2018-10-24 11:45:11,171 INFO L226 Difference]: Without dead ends: 756 [2018-10-24 11:45:11,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=379, Invalid=881, Unknown=0, NotChecked=0, Total=1260 [2018-10-24 11:45:11,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2018-10-24 11:45:11,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 287. [2018-10-24 11:45:11,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-10-24 11:45:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 353 transitions. [2018-10-24 11:45:11,192 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 353 transitions. Word has length 96 [2018-10-24 11:45:11,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:11,192 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 353 transitions. [2018-10-24 11:45:11,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 11:45:11,192 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 353 transitions. [2018-10-24 11:45:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-24 11:45:11,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:11,196 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:11,196 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:11,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:11,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1765037238, now seen corresponding path program 4 times [2018-10-24 11:45:11,197 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:11,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:11,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:11,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:11,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:11,378 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2018-10-24 11:45:11,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:11,378 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 11:45:11,386 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:45:11,450 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:45:11,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:11,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2018-10-24 11:45:11,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:11,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-10-24 11:45:11,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 11:45:11,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 11:45:11,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:45:11,538 INFO L87 Difference]: Start difference. First operand 287 states and 353 transitions. Second operand 11 states. [2018-10-24 11:45:11,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:11,741 INFO L93 Difference]: Finished difference Result 658 states and 825 transitions. [2018-10-24 11:45:11,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 11:45:11,742 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 118 [2018-10-24 11:45:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:11,746 INFO L225 Difference]: With dead ends: 658 [2018-10-24 11:45:11,747 INFO L226 Difference]: Without dead ends: 414 [2018-10-24 11:45:11,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:45:11,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2018-10-24 11:45:11,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 322. [2018-10-24 11:45:11,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-10-24 11:45:11,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 396 transitions. [2018-10-24 11:45:11,772 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 396 transitions. Word has length 118 [2018-10-24 11:45:11,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:11,773 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 396 transitions. [2018-10-24 11:45:11,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 11:45:11,773 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 396 transitions. [2018-10-24 11:45:11,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-24 11:45:11,775 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:11,776 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:11,776 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:11,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:11,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1398790276, now seen corresponding path program 5 times [2018-10-24 11:45:11,777 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:11,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:11,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:11,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:11,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2018-10-24 11:45:12,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:12,092 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:12,107 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:45:12,199 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-24 11:45:12,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:12,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2018-10-24 11:45:12,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:12,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-10-24 11:45:12,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 11:45:12,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 11:45:12,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:45:12,280 INFO L87 Difference]: Start difference. First operand 322 states and 396 transitions. Second operand 12 states. [2018-10-24 11:45:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:13,726 INFO L93 Difference]: Finished difference Result 723 states and 906 transitions. [2018-10-24 11:45:13,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 11:45:13,727 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 130 [2018-10-24 11:45:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:13,729 INFO L225 Difference]: With dead ends: 723 [2018-10-24 11:45:13,730 INFO L226 Difference]: Without dead ends: 449 [2018-10-24 11:45:13,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:45:13,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2018-10-24 11:45:13,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 357. [2018-10-24 11:45:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2018-10-24 11:45:13,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 439 transitions. [2018-10-24 11:45:13,754 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 439 transitions. Word has length 130 [2018-10-24 11:45:13,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:13,754 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 439 transitions. [2018-10-24 11:45:13,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 11:45:13,754 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 439 transitions. [2018-10-24 11:45:13,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-24 11:45:13,756 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:13,757 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:13,757 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:13,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:13,757 INFO L82 PathProgramCache]: Analyzing trace with hash 819790474, now seen corresponding path program 6 times [2018-10-24 11:45:13,758 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:13,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:13,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:13,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:13,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2018-10-24 11:45:14,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:14,850 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:14,857 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:45:14,945 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-24 11:45:14,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:14,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 74 proven. 14 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2018-10-24 11:45:15,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:15,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 17 [2018-10-24 11:45:15,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-24 11:45:15,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-24 11:45:15,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2018-10-24 11:45:15,097 INFO L87 Difference]: Start difference. First operand 357 states and 439 transitions. Second operand 17 states. [2018-10-24 11:45:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:18,223 INFO L93 Difference]: Finished difference Result 1660 states and 2098 transitions. [2018-10-24 11:45:18,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-24 11:45:18,223 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 142 [2018-10-24 11:45:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:18,234 INFO L225 Difference]: With dead ends: 1660 [2018-10-24 11:45:18,234 INFO L226 Difference]: Without dead ends: 1354 [2018-10-24 11:45:18,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1048, Invalid=2492, Unknown=0, NotChecked=0, Total=3540 [2018-10-24 11:45:18,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2018-10-24 11:45:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 417. [2018-10-24 11:45:18,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2018-10-24 11:45:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 515 transitions. [2018-10-24 11:45:18,273 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 515 transitions. Word has length 142 [2018-10-24 11:45:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:18,273 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 515 transitions. [2018-10-24 11:45:18,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-24 11:45:18,274 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 515 transitions. [2018-10-24 11:45:18,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-24 11:45:18,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:18,276 INFO L375 BasicCegarLoop]: trace histogram [13, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:18,276 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:18,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:18,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1104809801, now seen corresponding path program 7 times [2018-10-24 11:45:18,277 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:18,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:18,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:18,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:18,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2018-10-24 11:45:18,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:18,639 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:18,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:18,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2018-10-24 11:45:18,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:18,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-10-24 11:45:18,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-24 11:45:18,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-24 11:45:18,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:45:18,772 INFO L87 Difference]: Start difference. First operand 417 states and 515 transitions. Second operand 14 states. [2018-10-24 11:45:19,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:19,115 INFO L93 Difference]: Finished difference Result 953 states and 1200 transitions. [2018-10-24 11:45:19,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 11:45:19,115 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 164 [2018-10-24 11:45:19,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:19,118 INFO L225 Difference]: With dead ends: 953 [2018-10-24 11:45:19,118 INFO L226 Difference]: Without dead ends: 594 [2018-10-24 11:45:19,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:45:19,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2018-10-24 11:45:19,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 452. [2018-10-24 11:45:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2018-10-24 11:45:19,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 558 transitions. [2018-10-24 11:45:19,149 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 558 transitions. Word has length 164 [2018-10-24 11:45:19,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:19,150 INFO L481 AbstractCegarLoop]: Abstraction has 452 states and 558 transitions. [2018-10-24 11:45:19,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-24 11:45:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 558 transitions. [2018-10-24 11:45:19,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-24 11:45:19,152 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:19,153 INFO L375 BasicCegarLoop]: trace histogram [14, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:19,153 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:19,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:19,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1958819663, now seen corresponding path program 8 times [2018-10-24 11:45:19,154 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:19,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:19,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:19,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:19,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2018-10-24 11:45:19,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:19,428 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:19,436 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:45:19,499 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:45:19,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:19,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2018-10-24 11:45:19,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:19,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-10-24 11:45:19,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 11:45:19,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 11:45:19,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-24 11:45:19,583 INFO L87 Difference]: Start difference. First operand 452 states and 558 transitions. Second operand 15 states. [2018-10-24 11:45:19,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:19,881 INFO L93 Difference]: Finished difference Result 1018 states and 1281 transitions. [2018-10-24 11:45:19,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 11:45:19,882 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 176 [2018-10-24 11:45:19,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:19,886 INFO L225 Difference]: With dead ends: 1018 [2018-10-24 11:45:19,886 INFO L226 Difference]: Without dead ends: 629 [2018-10-24 11:45:19,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-24 11:45:19,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2018-10-24 11:45:19,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 487. [2018-10-24 11:45:19,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2018-10-24 11:45:19,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 601 transitions. [2018-10-24 11:45:19,947 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 601 transitions. Word has length 176 [2018-10-24 11:45:19,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:19,947 INFO L481 AbstractCegarLoop]: Abstraction has 487 states and 601 transitions. [2018-10-24 11:45:19,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-24 11:45:19,947 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 601 transitions. [2018-10-24 11:45:19,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-24 11:45:19,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:19,950 INFO L375 BasicCegarLoop]: trace histogram [15, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:19,950 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:19,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:19,951 INFO L82 PathProgramCache]: Analyzing trace with hash -54785783, now seen corresponding path program 9 times [2018-10-24 11:45:19,951 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:19,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:19,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:19,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:19,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2018-10-24 11:45:20,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:20,789 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:20,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:45:20,842 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-24 11:45:20,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:20,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 123 proven. 36 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2018-10-24 11:45:21,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:21,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2018-10-24 11:45:21,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-24 11:45:21,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-24 11:45:21,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2018-10-24 11:45:21,137 INFO L87 Difference]: Start difference. First operand 487 states and 601 transitions. Second operand 21 states. [2018-10-24 11:45:24,611 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-24 11:45:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:24,736 INFO L93 Difference]: Finished difference Result 2547 states and 3225 transitions. [2018-10-24 11:45:24,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-24 11:45:24,737 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 188 [2018-10-24 11:45:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:24,747 INFO L225 Difference]: With dead ends: 2547 [2018-10-24 11:45:24,747 INFO L226 Difference]: Without dead ends: 2126 [2018-10-24 11:45:24,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2335, Invalid=5675, Unknown=0, NotChecked=0, Total=8010 [2018-10-24 11:45:24,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2018-10-24 11:45:24,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 547. [2018-10-24 11:45:24,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2018-10-24 11:45:24,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 677 transitions. [2018-10-24 11:45:24,804 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 677 transitions. Word has length 188 [2018-10-24 11:45:24,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:24,804 INFO L481 AbstractCegarLoop]: Abstraction has 547 states and 677 transitions. [2018-10-24 11:45:24,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-24 11:45:24,804 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 677 transitions. [2018-10-24 11:45:24,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-24 11:45:24,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:24,808 INFO L375 BasicCegarLoop]: trace histogram [17, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:24,808 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:24,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:24,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1253271084, now seen corresponding path program 10 times [2018-10-24 11:45:24,809 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:24,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:24,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:24,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:24,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2018-10-24 11:45:25,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:25,931 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:25,939 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:45:26,018 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:45:26,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:26,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2018-10-24 11:45:26,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:26,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-10-24 11:45:26,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-24 11:45:26,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-24 11:45:26,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-24 11:45:26,110 INFO L87 Difference]: Start difference. First operand 547 states and 677 transitions. Second operand 17 states. [2018-10-24 11:45:26,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:26,449 INFO L93 Difference]: Finished difference Result 1248 states and 1575 transitions. [2018-10-24 11:45:26,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 11:45:26,449 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 210 [2018-10-24 11:45:26,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:26,454 INFO L225 Difference]: With dead ends: 1248 [2018-10-24 11:45:26,454 INFO L226 Difference]: Without dead ends: 774 [2018-10-24 11:45:26,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-24 11:45:26,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2018-10-24 11:45:26,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 582. [2018-10-24 11:45:26,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2018-10-24 11:45:26,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 720 transitions. [2018-10-24 11:45:26,518 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 720 transitions. Word has length 210 [2018-10-24 11:45:26,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:26,518 INFO L481 AbstractCegarLoop]: Abstraction has 582 states and 720 transitions. [2018-10-24 11:45:26,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-24 11:45:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 720 transitions. [2018-10-24 11:45:26,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-24 11:45:26,523 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:26,523 INFO L375 BasicCegarLoop]: trace histogram [18, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:26,523 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:26,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:26,524 INFO L82 PathProgramCache]: Analyzing trace with hash -728855154, now seen corresponding path program 11 times [2018-10-24 11:45:26,524 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:26,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:26,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:26,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:26,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 837 trivial. 0 not checked. [2018-10-24 11:45:27,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:27,373 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:27,380 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:45:27,595 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2018-10-24 11:45:27,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:27,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 769 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-10-24 11:45:27,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:27,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-10-24 11:45:27,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-24 11:45:27,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-24 11:45:27,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:45:27,669 INFO L87 Difference]: Start difference. First operand 582 states and 720 transitions. Second operand 18 states. [2018-10-24 11:45:28,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:28,037 INFO L93 Difference]: Finished difference Result 1313 states and 1656 transitions. [2018-10-24 11:45:28,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-24 11:45:28,038 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 222 [2018-10-24 11:45:28,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:28,041 INFO L225 Difference]: With dead ends: 1313 [2018-10-24 11:45:28,041 INFO L226 Difference]: Without dead ends: 809 [2018-10-24 11:45:28,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:45:28,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2018-10-24 11:45:28,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 617. [2018-10-24 11:45:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2018-10-24 11:45:28,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 763 transitions. [2018-10-24 11:45:28,100 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 763 transitions. Word has length 222 [2018-10-24 11:45:28,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:28,100 INFO L481 AbstractCegarLoop]: Abstraction has 617 states and 763 transitions. [2018-10-24 11:45:28,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-24 11:45:28,101 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 763 transitions. [2018-10-24 11:45:28,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-10-24 11:45:28,103 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:28,103 INFO L375 BasicCegarLoop]: trace histogram [19, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:28,103 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:28,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:28,104 INFO L82 PathProgramCache]: Analyzing trace with hash -269623020, now seen corresponding path program 12 times [2018-10-24 11:45:28,104 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:28,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:28,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:28,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:28,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2018-10-24 11:45:28,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:28,567 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:28,575 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:45:28,743 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-24 11:45:28,744 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:28,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 184 proven. 68 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2018-10-24 11:45:28,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:28,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2018-10-24 11:45:28,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-24 11:45:28,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-24 11:45:28,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2018-10-24 11:45:28,955 INFO L87 Difference]: Start difference. First operand 617 states and 763 transitions. Second operand 25 states. [2018-10-24 11:45:29,670 WARN L179 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2018-10-24 11:45:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:34,989 INFO L93 Difference]: Finished difference Result 3608 states and 4574 transitions. [2018-10-24 11:45:34,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-10-24 11:45:34,990 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 234 [2018-10-24 11:45:34,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:34,999 INFO L225 Difference]: With dead ends: 3608 [2018-10-24 11:45:34,999 INFO L226 Difference]: Without dead ends: 3072 [2018-10-24 11:45:35,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5425 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4528, Invalid=11222, Unknown=0, NotChecked=0, Total=15750 [2018-10-24 11:45:35,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2018-10-24 11:45:35,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 677. [2018-10-24 11:45:35,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2018-10-24 11:45:35,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 839 transitions. [2018-10-24 11:45:35,083 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 839 transitions. Word has length 234 [2018-10-24 11:45:35,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:35,084 INFO L481 AbstractCegarLoop]: Abstraction has 677 states and 839 transitions. [2018-10-24 11:45:35,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-24 11:45:35,084 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 839 transitions. [2018-10-24 11:45:35,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-10-24 11:45:35,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:35,086 INFO L375 BasicCegarLoop]: trace histogram [21, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:35,087 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:35,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:35,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1024454701, now seen corresponding path program 13 times [2018-10-24 11:45:35,087 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:35,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:35,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:35,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:35,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 1132 trivial. 0 not checked. [2018-10-24 11:45:35,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:35,557 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:35,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:35,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 1132 trivial. 0 not checked. [2018-10-24 11:45:35,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:35,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-10-24 11:45:35,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-24 11:45:35,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-24 11:45:35,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:45:35,816 INFO L87 Difference]: Start difference. First operand 677 states and 839 transitions. Second operand 20 states. [2018-10-24 11:45:36,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:36,294 INFO L93 Difference]: Finished difference Result 1543 states and 1950 transitions. [2018-10-24 11:45:36,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 11:45:36,294 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 256 [2018-10-24 11:45:36,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:36,298 INFO L225 Difference]: With dead ends: 1543 [2018-10-24 11:45:36,299 INFO L226 Difference]: Without dead ends: 954 [2018-10-24 11:45:36,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:45:36,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2018-10-24 11:45:36,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 712. [2018-10-24 11:45:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2018-10-24 11:45:36,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 882 transitions. [2018-10-24 11:45:36,366 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 882 transitions. Word has length 256 [2018-10-24 11:45:36,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:36,366 INFO L481 AbstractCegarLoop]: Abstraction has 712 states and 882 transitions. [2018-10-24 11:45:36,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-24 11:45:36,367 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 882 transitions. [2018-10-24 11:45:36,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-10-24 11:45:36,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:36,369 INFO L375 BasicCegarLoop]: trace histogram [22, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:36,369 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:36,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:36,370 INFO L82 PathProgramCache]: Analyzing trace with hash 512549209, now seen corresponding path program 14 times [2018-10-24 11:45:36,370 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:36,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:36,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:36,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:45:36,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 1256 trivial. 0 not checked. [2018-10-24 11:45:36,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:36,694 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:36,702 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:45:36,814 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:45:36,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:36,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 1256 trivial. 0 not checked. [2018-10-24 11:45:37,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:37,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-10-24 11:45:37,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-24 11:45:37,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-24 11:45:37,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-24 11:45:37,089 INFO L87 Difference]: Start difference. First operand 712 states and 882 transitions. Second operand 21 states. [2018-10-24 11:45:38,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:38,291 INFO L93 Difference]: Finished difference Result 1608 states and 2031 transitions. [2018-10-24 11:45:38,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 11:45:38,292 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 268 [2018-10-24 11:45:38,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:38,297 INFO L225 Difference]: With dead ends: 1608 [2018-10-24 11:45:38,297 INFO L226 Difference]: Without dead ends: 989 [2018-10-24 11:45:38,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-24 11:45:38,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2018-10-24 11:45:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 747. [2018-10-24 11:45:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 747 states. [2018-10-24 11:45:38,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 925 transitions. [2018-10-24 11:45:38,382 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 925 transitions. Word has length 268 [2018-10-24 11:45:38,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:38,382 INFO L481 AbstractCegarLoop]: Abstraction has 747 states and 925 transitions. [2018-10-24 11:45:38,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-24 11:45:38,382 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 925 transitions. [2018-10-24 11:45:38,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-10-24 11:45:38,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:38,385 INFO L375 BasicCegarLoop]: trace histogram [23, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:38,385 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:38,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:38,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1646487149, now seen corresponding path program 15 times [2018-10-24 11:45:38,385 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:38,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:38,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:38,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:38,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2188 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 1387 trivial. 0 not checked. [2018-10-24 11:45:39,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:39,048 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:39,056 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:45:39,144 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-24 11:45:39,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:39,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2188 backedges. 257 proven. 110 refuted. 0 times theorem prover too weak. 1821 trivial. 0 not checked. [2018-10-24 11:45:39,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:39,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10] total 29 [2018-10-24 11:45:39,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-24 11:45:39,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-24 11:45:39,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=571, Unknown=0, NotChecked=0, Total=812 [2018-10-24 11:45:39,397 INFO L87 Difference]: Start difference. First operand 747 states and 925 transitions. Second operand 29 states. [2018-10-24 11:45:48,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:48,766 INFO L93 Difference]: Finished difference Result 4843 states and 6145 transitions. [2018-10-24 11:45:48,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-10-24 11:45:48,766 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 280 [2018-10-24 11:45:48,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:48,781 INFO L225 Difference]: With dead ends: 4843 [2018-10-24 11:45:48,781 INFO L226 Difference]: Without dead ends: 4192 [2018-10-24 11:45:48,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10224 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=7969, Invalid=20087, Unknown=0, NotChecked=0, Total=28056 [2018-10-24 11:45:48,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4192 states. [2018-10-24 11:45:48,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4192 to 807. [2018-10-24 11:45:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 807 states. [2018-10-24 11:45:48,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1001 transitions. [2018-10-24 11:45:48,921 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1001 transitions. Word has length 280 [2018-10-24 11:45:48,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:48,922 INFO L481 AbstractCegarLoop]: Abstraction has 807 states and 1001 transitions. [2018-10-24 11:45:48,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-24 11:45:48,922 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1001 transitions. [2018-10-24 11:45:48,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-10-24 11:45:48,924 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:48,924 INFO L375 BasicCegarLoop]: trace histogram [25, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:48,924 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:48,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:48,925 INFO L82 PathProgramCache]: Analyzing trace with hash -246763682, now seen corresponding path program 16 times [2018-10-24 11:45:48,925 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:48,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:48,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:48,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:48,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2506 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 1613 trivial. 0 not checked. [2018-10-24 11:45:49,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:49,341 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:49,349 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:45:49,459 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:45:49,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:49,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2506 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 1613 trivial. 0 not checked. [2018-10-24 11:45:49,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:49,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-10-24 11:45:49,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-24 11:45:49,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-24 11:45:49,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-24 11:45:49,582 INFO L87 Difference]: Start difference. First operand 807 states and 1001 transitions. Second operand 23 states. [2018-10-24 11:45:50,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:50,172 INFO L93 Difference]: Finished difference Result 1838 states and 2325 transitions. [2018-10-24 11:45:50,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-24 11:45:50,172 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 302 [2018-10-24 11:45:50,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:50,178 INFO L225 Difference]: With dead ends: 1838 [2018-10-24 11:45:50,178 INFO L226 Difference]: Without dead ends: 1134 [2018-10-24 11:45:50,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-24 11:45:50,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2018-10-24 11:45:50,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 842. [2018-10-24 11:45:50,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 842 states. [2018-10-24 11:45:50,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1044 transitions. [2018-10-24 11:45:50,289 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1044 transitions. Word has length 302 [2018-10-24 11:45:50,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:50,290 INFO L481 AbstractCegarLoop]: Abstraction has 842 states and 1044 transitions. [2018-10-24 11:45:50,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-24 11:45:50,290 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1044 transitions. [2018-10-24 11:45:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-10-24 11:45:50,291 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:50,292 INFO L375 BasicCegarLoop]: trace histogram [26, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:50,292 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:50,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:50,292 INFO L82 PathProgramCache]: Analyzing trace with hash 193857944, now seen corresponding path program 17 times [2018-10-24 11:45:50,292 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:50,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:50,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:50,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:50,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2750 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-10-24 11:45:52,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:52,454 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:52,461 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:45:53,079 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2018-10-24 11:45:53,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:53,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2750 backedges. 0 proven. 1598 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2018-10-24 11:45:53,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:53,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-10-24 11:45:53,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-24 11:45:53,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-24 11:45:53,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:45:53,202 INFO L87 Difference]: Start difference. First operand 842 states and 1044 transitions. Second operand 24 states. [2018-10-24 11:45:53,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:45:53,780 INFO L93 Difference]: Finished difference Result 1903 states and 2406 transitions. [2018-10-24 11:45:53,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-24 11:45:53,784 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 314 [2018-10-24 11:45:53,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:45:53,788 INFO L225 Difference]: With dead ends: 1903 [2018-10-24 11:45:53,789 INFO L226 Difference]: Without dead ends: 1169 [2018-10-24 11:45:53,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:45:53,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2018-10-24 11:45:53,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 877. [2018-10-24 11:45:53,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 877 states. [2018-10-24 11:45:53,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1087 transitions. [2018-10-24 11:45:53,906 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1087 transitions. Word has length 314 [2018-10-24 11:45:53,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:45:53,906 INFO L481 AbstractCegarLoop]: Abstraction has 877 states and 1087 transitions. [2018-10-24 11:45:53,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-24 11:45:53,906 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1087 transitions. [2018-10-24 11:45:53,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-10-24 11:45:53,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:45:53,909 INFO L375 BasicCegarLoop]: trace histogram [27, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:45:53,909 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:45:53,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:45:53,909 INFO L82 PathProgramCache]: Analyzing trace with hash -834148706, now seen corresponding path program 18 times [2018-10-24 11:45:53,910 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:45:53,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:45:53,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:53,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:45:53,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:45:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:45:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3006 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 1914 trivial. 0 not checked. [2018-10-24 11:45:54,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:45:54,401 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:45:54,417 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:45:54,863 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-10-24 11:45:54,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:45:54,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:45:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3006 backedges. 342 proven. 162 refuted. 0 times theorem prover too weak. 2502 trivial. 0 not checked. [2018-10-24 11:45:55,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:45:55,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11] total 33 [2018-10-24 11:45:55,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-24 11:45:55,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-24 11:45:55,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2018-10-24 11:45:55,334 INFO L87 Difference]: Start difference. First operand 877 states and 1087 transitions. Second operand 33 states. [2018-10-24 11:46:00,001 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2018-10-24 11:46:08,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:46:08,965 INFO L93 Difference]: Finished difference Result 6252 states and 7938 transitions. [2018-10-24 11:46:08,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 208 states. [2018-10-24 11:46:08,965 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 326 [2018-10-24 11:46:08,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:46:08,981 INFO L225 Difference]: With dead ends: 6252 [2018-10-24 11:46:08,981 INFO L226 Difference]: Without dead ends: 5486 [2018-10-24 11:46:08,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17636 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=13054, Invalid=33386, Unknown=0, NotChecked=0, Total=46440 [2018-10-24 11:46:08,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2018-10-24 11:46:09,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 937. [2018-10-24 11:46:09,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 937 states. [2018-10-24 11:46:09,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1163 transitions. [2018-10-24 11:46:09,138 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1163 transitions. Word has length 326 [2018-10-24 11:46:09,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:46:09,139 INFO L481 AbstractCegarLoop]: Abstraction has 937 states and 1163 transitions. [2018-10-24 11:46:09,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-24 11:46:09,139 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1163 transitions. [2018-10-24 11:46:09,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-10-24 11:46:09,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:46:09,141 INFO L375 BasicCegarLoop]: trace histogram [29, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:46:09,141 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:46:09,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:46:09,141 INFO L82 PathProgramCache]: Analyzing trace with hash -21096611, now seen corresponding path program 19 times [2018-10-24 11:46:09,141 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:46:09,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:46:09,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:46:09,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:46:09,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:46:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:46:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3378 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 2179 trivial. 0 not checked. [2018-10-24 11:46:10,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:46:10,145 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:46:10,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:46:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:46:10,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:46:10,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3378 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 2179 trivial. 0 not checked. [2018-10-24 11:46:10,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:46:10,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-10-24 11:46:10,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-24 11:46:10,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-24 11:46:10,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:46:10,416 INFO L87 Difference]: Start difference. First operand 937 states and 1163 transitions. Second operand 26 states. [2018-10-24 11:46:11,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:46:11,111 INFO L93 Difference]: Finished difference Result 2133 states and 2700 transitions. [2018-10-24 11:46:11,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-24 11:46:11,111 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 348 [2018-10-24 11:46:11,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:46:11,117 INFO L225 Difference]: With dead ends: 2133 [2018-10-24 11:46:11,117 INFO L226 Difference]: Without dead ends: 1314 [2018-10-24 11:46:11,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:46:11,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2018-10-24 11:46:11,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 972. [2018-10-24 11:46:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 972 states. [2018-10-24 11:46:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1206 transitions. [2018-10-24 11:46:11,261 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1206 transitions. Word has length 348 [2018-10-24 11:46:11,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:46:11,261 INFO L481 AbstractCegarLoop]: Abstraction has 972 states and 1206 transitions. [2018-10-24 11:46:11,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-24 11:46:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1206 transitions. [2018-10-24 11:46:11,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2018-10-24 11:46:11,264 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:46:11,264 INFO L375 BasicCegarLoop]: trace histogram [30, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:46:11,264 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:46:11,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:46:11,265 INFO L82 PathProgramCache]: Analyzing trace with hash -311889309, now seen corresponding path program 20 times [2018-10-24 11:46:11,265 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:46:11,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:46:11,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:46:11,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:46:11,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:46:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:46:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 2349 trivial. 0 not checked. [2018-10-24 11:46:12,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:46:12,212 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:46:12,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:46:12,338 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:46:12,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:46:12,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:46:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 2349 trivial. 0 not checked. [2018-10-24 11:46:12,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:46:12,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-10-24 11:46:12,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-24 11:46:12,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-24 11:46:12,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-24 11:46:12,524 INFO L87 Difference]: Start difference. First operand 972 states and 1206 transitions. Second operand 27 states. [2018-10-24 11:46:13,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:46:13,232 INFO L93 Difference]: Finished difference Result 2198 states and 2781 transitions. [2018-10-24 11:46:13,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-24 11:46:13,233 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 360 [2018-10-24 11:46:13,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:46:13,238 INFO L225 Difference]: With dead ends: 2198 [2018-10-24 11:46:13,238 INFO L226 Difference]: Without dead ends: 1349 [2018-10-24 11:46:13,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-24 11:46:13,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2018-10-24 11:46:13,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1007. [2018-10-24 11:46:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1007 states. [2018-10-24 11:46:13,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1249 transitions. [2018-10-24 11:46:13,478 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1249 transitions. Word has length 360 [2018-10-24 11:46:13,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:46:13,478 INFO L481 AbstractCegarLoop]: Abstraction has 1007 states and 1249 transitions. [2018-10-24 11:46:13,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-24 11:46:13,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1249 transitions. [2018-10-24 11:46:13,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-10-24 11:46:13,481 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:46:13,482 INFO L375 BasicCegarLoop]: trace histogram [31, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:46:13,482 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:46:13,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:46:13,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1487483165, now seen corresponding path program 21 times [2018-10-24 11:46:13,483 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:46:13,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:46:13,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:46:13,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:46:13,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:46:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:46:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3954 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 2526 trivial. 0 not checked. [2018-10-24 11:46:14,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:46:14,759 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:46:14,767 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:46:14,880 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-24 11:46:14,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:46:14,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:46:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3954 backedges. 439 proven. 224 refuted. 0 times theorem prover too weak. 3291 trivial. 0 not checked. [2018-10-24 11:46:15,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:46:15,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 12] total 37 [2018-10-24 11:46:15,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-24 11:46:15,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-24 11:46:15,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=933, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 11:46:15,439 INFO L87 Difference]: Start difference. First operand 1007 states and 1249 transitions. Second operand 37 states. [2018-10-24 11:46:35,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:46:35,995 INFO L93 Difference]: Finished difference Result 7835 states and 9953 transitions. [2018-10-24 11:46:35,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 261 states. [2018-10-24 11:46:35,995 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 372 [2018-10-24 11:46:35,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:46:36,006 INFO L225 Difference]: With dead ends: 7835 [2018-10-24 11:46:36,006 INFO L226 Difference]: Without dead ends: 6954 [2018-10-24 11:46:36,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 839 GetRequests, 571 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28479 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=20233, Invalid=52397, Unknown=0, NotChecked=0, Total=72630 [2018-10-24 11:46:36,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6954 states. [2018-10-24 11:46:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6954 to 1067. [2018-10-24 11:46:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2018-10-24 11:46:36,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1325 transitions. [2018-10-24 11:46:36,268 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1325 transitions. Word has length 372 [2018-10-24 11:46:36,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:46:36,268 INFO L481 AbstractCegarLoop]: Abstraction has 1067 states and 1325 transitions. [2018-10-24 11:46:36,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-24 11:46:36,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1325 transitions. [2018-10-24 11:46:36,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2018-10-24 11:46:36,270 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:46:36,271 INFO L375 BasicCegarLoop]: trace histogram [33, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:46:36,271 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:46:36,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:46:36,271 INFO L82 PathProgramCache]: Analyzing trace with hash 739273704, now seen corresponding path program 22 times [2018-10-24 11:46:36,271 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:46:36,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:46:36,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:46:36,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:46:36,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:46:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:46:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4380 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 2830 trivial. 0 not checked. [2018-10-24 11:46:38,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:46:38,305 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:46:38,313 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:46:38,455 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:46:38,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:46:38,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:46:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4380 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 2830 trivial. 0 not checked. [2018-10-24 11:46:38,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:46:38,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-10-24 11:46:38,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-24 11:46:38,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-24 11:46:38,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-24 11:46:38,699 INFO L87 Difference]: Start difference. First operand 1067 states and 1325 transitions. Second operand 29 states. [2018-10-24 11:46:39,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:46:39,673 INFO L93 Difference]: Finished difference Result 2428 states and 3075 transitions. [2018-10-24 11:46:39,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-24 11:46:39,674 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 394 [2018-10-24 11:46:39,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:46:39,679 INFO L225 Difference]: With dead ends: 2428 [2018-10-24 11:46:39,679 INFO L226 Difference]: Without dead ends: 1494 [2018-10-24 11:46:39,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-24 11:46:39,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2018-10-24 11:46:40,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1102. [2018-10-24 11:46:40,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1102 states. [2018-10-24 11:46:40,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1368 transitions. [2018-10-24 11:46:40,043 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1368 transitions. Word has length 394 [2018-10-24 11:46:40,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:46:40,043 INFO L481 AbstractCegarLoop]: Abstraction has 1102 states and 1368 transitions. [2018-10-24 11:46:40,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-24 11:46:40,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1368 transitions. [2018-10-24 11:46:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-10-24 11:46:40,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:46:40,047 INFO L375 BasicCegarLoop]: trace histogram [34, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:46:40,047 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:46:40,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:46:40,048 INFO L82 PathProgramCache]: Analyzing trace with hash -787428190, now seen corresponding path program 23 times [2018-10-24 11:46:40,048 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:46:40,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:46:40,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:46:40,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:46:40,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:46:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:46:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4700 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 3023 trivial. 0 not checked. [2018-10-24 11:46:40,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:46:40,640 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:46:40,647 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:46:41,765 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2018-10-24 11:46:41,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:46:41,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:46:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4700 backedges. 0 proven. 2727 refuted. 0 times theorem prover too weak. 1973 trivial. 0 not checked. [2018-10-24 11:46:41,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:46:41,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-10-24 11:46:41,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-24 11:46:41,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-24 11:46:41,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-24 11:46:41,966 INFO L87 Difference]: Start difference. First operand 1102 states and 1368 transitions. Second operand 30 states. [2018-10-24 11:46:42,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:46:42,751 INFO L93 Difference]: Finished difference Result 2493 states and 3156 transitions. [2018-10-24 11:46:42,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-24 11:46:42,752 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 406 [2018-10-24 11:46:42,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:46:42,754 INFO L225 Difference]: With dead ends: 2493 [2018-10-24 11:46:42,754 INFO L226 Difference]: Without dead ends: 1529 [2018-10-24 11:46:42,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-24 11:46:42,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2018-10-24 11:46:42,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1137. [2018-10-24 11:46:42,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1137 states. [2018-10-24 11:46:42,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1411 transitions. [2018-10-24 11:46:42,953 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1411 transitions. Word has length 406 [2018-10-24 11:46:42,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:46:42,953 INFO L481 AbstractCegarLoop]: Abstraction has 1137 states and 1411 transitions. [2018-10-24 11:46:42,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-24 11:46:42,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1411 transitions. [2018-10-24 11:46:42,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-10-24 11:46:42,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:46:42,956 INFO L375 BasicCegarLoop]: trace histogram [35, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:46:42,957 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:46:42,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:46:42,957 INFO L82 PathProgramCache]: Analyzing trace with hash 406164264, now seen corresponding path program 24 times [2018-10-24 11:46:42,957 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:46:42,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:46:42,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:46:42,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:46:42,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:46:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:46:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5032 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 3223 trivial. 0 not checked. [2018-10-24 11:46:43,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:46:43,875 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:46:43,892 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:46:44,781 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-24 11:46:44,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:46:44,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:46:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5032 backedges. 548 proven. 296 refuted. 0 times theorem prover too weak. 4188 trivial. 0 not checked. [2018-10-24 11:46:45,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:46:45,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 13] total 41 [2018-10-24 11:46:45,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-24 11:46:45,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-24 11:46:45,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=1147, Unknown=0, NotChecked=0, Total=1640 [2018-10-24 11:46:45,236 INFO L87 Difference]: Start difference. First operand 1137 states and 1411 transitions. Second operand 41 states. [2018-10-24 11:47:16,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:47:16,805 INFO L93 Difference]: Finished difference Result 9592 states and 12190 transitions. [2018-10-24 11:47:16,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 320 states. [2018-10-24 11:47:16,805 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 418 [2018-10-24 11:47:16,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:47:16,814 INFO L225 Difference]: With dead ends: 9592 [2018-10-24 11:47:16,814 INFO L226 Difference]: Without dead ends: 8596 [2018-10-24 11:47:16,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 997 GetRequests, 668 SyntacticMatches, 1 SemanticMatches, 328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43901 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=30010, Invalid=78560, Unknown=0, NotChecked=0, Total=108570 [2018-10-24 11:47:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8596 states. [2018-10-24 11:47:17,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8596 to 1197. [2018-10-24 11:47:17,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2018-10-24 11:47:17,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1487 transitions. [2018-10-24 11:47:17,158 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1487 transitions. Word has length 418 [2018-10-24 11:47:17,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:47:17,159 INFO L481 AbstractCegarLoop]: Abstraction has 1197 states and 1487 transitions. [2018-10-24 11:47:17,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-24 11:47:17,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1487 transitions. [2018-10-24 11:47:17,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2018-10-24 11:47:17,162 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:47:17,162 INFO L375 BasicCegarLoop]: trace histogram [37, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:47:17,163 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:47:17,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:47:17,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2049530393, now seen corresponding path program 25 times [2018-10-24 11:47:17,163 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:47:17,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:47:17,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:47:17,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:47:17,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:47:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:47:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 3566 trivial. 0 not checked. [2018-10-24 11:47:17,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:47:17,842 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:47:17,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:47:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:47:17,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:47:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 3566 trivial. 0 not checked. [2018-10-24 11:47:18,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:47:18,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-10-24 11:47:18,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-24 11:47:18,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-24 11:47:18,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-24 11:47:18,118 INFO L87 Difference]: Start difference. First operand 1197 states and 1487 transitions. Second operand 32 states. [2018-10-24 11:47:19,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:47:19,262 INFO L93 Difference]: Finished difference Result 2723 states and 3450 transitions. [2018-10-24 11:47:19,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-24 11:47:19,263 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 440 [2018-10-24 11:47:19,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:47:19,265 INFO L225 Difference]: With dead ends: 2723 [2018-10-24 11:47:19,266 INFO L226 Difference]: Without dead ends: 1674 [2018-10-24 11:47:19,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-24 11:47:19,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2018-10-24 11:47:19,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1232. [2018-10-24 11:47:19,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1232 states. [2018-10-24 11:47:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1530 transitions. [2018-10-24 11:47:19,543 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1530 transitions. Word has length 440 [2018-10-24 11:47:19,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:47:19,544 INFO L481 AbstractCegarLoop]: Abstraction has 1232 states and 1530 transitions. [2018-10-24 11:47:19,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-24 11:47:19,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1530 transitions. [2018-10-24 11:47:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2018-10-24 11:47:19,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:47:19,547 INFO L375 BasicCegarLoop]: trace histogram [38, 30, 30, 29, 29, 29, 29, 29, 29, 29, 29, 29, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:47:19,547 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:47:19,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:47:19,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1652561299, now seen corresponding path program 26 times [2018-10-24 11:47:19,547 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:47:19,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:47:19,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:47:19,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:47:19,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:47:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:47:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5870 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2018-10-24 11:47:20,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:47:20,135 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:47:20,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:47:20,296 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:47:20,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:47:20,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:47:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5870 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2018-10-24 11:47:20,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:47:20,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-10-24 11:47:20,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-24 11:47:20,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-24 11:47:20,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-24 11:47:20,635 INFO L87 Difference]: Start difference. First operand 1232 states and 1530 transitions. Second operand 33 states. [2018-10-24 11:47:21,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:47:21,873 INFO L93 Difference]: Finished difference Result 2788 states and 3531 transitions. [2018-10-24 11:47:21,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-24 11:47:21,873 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 452 [2018-10-24 11:47:21,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:47:21,876 INFO L225 Difference]: With dead ends: 2788 [2018-10-24 11:47:21,876 INFO L226 Difference]: Without dead ends: 1709 [2018-10-24 11:47:21,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-24 11:47:21,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2018-10-24 11:47:22,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1267. [2018-10-24 11:47:22,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1267 states. [2018-10-24 11:47:22,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 1573 transitions. [2018-10-24 11:47:22,180 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 1573 transitions. Word has length 452 [2018-10-24 11:47:22,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:47:22,180 INFO L481 AbstractCegarLoop]: Abstraction has 1267 states and 1573 transitions. [2018-10-24 11:47:22,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-24 11:47:22,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 1573 transitions. [2018-10-24 11:47:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2018-10-24 11:47:22,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:47:22,183 INFO L375 BasicCegarLoop]: trace histogram [39, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:47:22,183 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:47:22,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:47:22,184 INFO L82 PathProgramCache]: Analyzing trace with hash 313806759, now seen corresponding path program 27 times [2018-10-24 11:47:22,184 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:47:22,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:47:22,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:47:22,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:47:22,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:47:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:47:22,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2018-10-24 11:47:22,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:47:22,832 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:47:22,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:47:23,068 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-24 11:47:23,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:47:23,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:47:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 669 proven. 378 refuted. 0 times theorem prover too weak. 5193 trivial. 0 not checked. [2018-10-24 11:47:23,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:47:23,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 14] total 45 [2018-10-24 11:47:23,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-24 11:47:23,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-24 11:47:23,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=1383, Unknown=0, NotChecked=0, Total=1980 [2018-10-24 11:47:23,933 INFO L87 Difference]: Start difference. First operand 1267 states and 1573 transitions. Second operand 45 states. [2018-10-24 11:47:50,666 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2018-10-24 11:48:09,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:48:09,464 INFO L93 Difference]: Finished difference Result 11523 states and 14649 transitions. [2018-10-24 11:48:09,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 385 states. [2018-10-24 11:48:09,464 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 464 [2018-10-24 11:48:09,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:48:09,474 INFO L225 Difference]: With dead ends: 11523 [2018-10-24 11:48:09,474 INFO L226 Difference]: Without dead ends: 10412 [2018-10-24 11:48:09,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1167 GetRequests, 773 SyntacticMatches, 0 SemanticMatches, 394 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64207 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=42943, Invalid=113477, Unknown=0, NotChecked=0, Total=156420 [2018-10-24 11:48:09,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10412 states. [2018-10-24 11:48:09,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10412 to 1327. [2018-10-24 11:48:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1327 states. [2018-10-24 11:48:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1649 transitions. [2018-10-24 11:48:09,855 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1649 transitions. Word has length 464 [2018-10-24 11:48:09,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:48:09,855 INFO L481 AbstractCegarLoop]: Abstraction has 1327 states and 1649 transitions. [2018-10-24 11:48:09,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-24 11:48:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1649 transitions. [2018-10-24 11:48:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2018-10-24 11:48:09,858 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:48:09,858 INFO L375 BasicCegarLoop]: trace histogram [41, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:48:09,859 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:48:09,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:48:09,859 INFO L82 PathProgramCache]: Analyzing trace with hash 967331698, now seen corresponding path program 28 times [2018-10-24 11:48:09,859 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:48:09,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:48:09,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:48:09,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:48:09,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:48:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:48:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6774 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 4387 trivial. 0 not checked. [2018-10-24 11:48:10,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:48:10,731 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:48:10,740 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:48:10,903 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:48:10,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:48:10,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:48:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6774 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 4387 trivial. 0 not checked. [2018-10-24 11:48:11,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:48:11,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-10-24 11:48:11,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-24 11:48:11,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-24 11:48:11,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 11:48:11,261 INFO L87 Difference]: Start difference. First operand 1327 states and 1649 transitions. Second operand 35 states. [2018-10-24 11:48:13,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:48:13,471 INFO L93 Difference]: Finished difference Result 3018 states and 3825 transitions. [2018-10-24 11:48:13,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-24 11:48:13,472 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 486 [2018-10-24 11:48:13,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:48:13,475 INFO L225 Difference]: With dead ends: 3018 [2018-10-24 11:48:13,475 INFO L226 Difference]: Without dead ends: 1854 [2018-10-24 11:48:13,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 11:48:13,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2018-10-24 11:48:13,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1362. [2018-10-24 11:48:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1362 states. [2018-10-24 11:48:13,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1692 transitions. [2018-10-24 11:48:13,863 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1692 transitions. Word has length 486 [2018-10-24 11:48:13,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:48:13,863 INFO L481 AbstractCegarLoop]: Abstraction has 1362 states and 1692 transitions. [2018-10-24 11:48:13,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-24 11:48:13,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1692 transitions. [2018-10-24 11:48:13,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2018-10-24 11:48:13,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:48:13,868 INFO L375 BasicCegarLoop]: trace histogram [42, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:48:13,868 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:48:13,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:48:13,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1787385516, now seen corresponding path program 29 times [2018-10-24 11:48:13,869 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:48:13,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:48:13,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:48:13,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:48:13,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:48:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:48:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7170 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 4626 trivial. 0 not checked. [2018-10-24 11:48:14,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:48:14,583 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:48:14,591 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:48:16,842 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2018-10-24 11:48:16,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:48:16,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:48:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7170 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 4626 trivial. 0 not checked. [2018-10-24 11:48:17,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:48:17,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-10-24 11:48:17,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-24 11:48:17,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-24 11:48:17,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-24 11:48:17,017 INFO L87 Difference]: Start difference. First operand 1362 states and 1692 transitions. Second operand 36 states. [2018-10-24 11:48:18,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:48:18,537 INFO L93 Difference]: Finished difference Result 3083 states and 3906 transitions. [2018-10-24 11:48:18,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-24 11:48:18,537 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 498 [2018-10-24 11:48:18,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:48:18,540 INFO L225 Difference]: With dead ends: 3083 [2018-10-24 11:48:18,540 INFO L226 Difference]: Without dead ends: 1889 [2018-10-24 11:48:18,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-24 11:48:18,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2018-10-24 11:48:18,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1397. [2018-10-24 11:48:18,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1397 states. [2018-10-24 11:48:18,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1735 transitions. [2018-10-24 11:48:18,947 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1735 transitions. Word has length 498 [2018-10-24 11:48:18,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:48:18,947 INFO L481 AbstractCegarLoop]: Abstraction has 1397 states and 1735 transitions. [2018-10-24 11:48:18,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-24 11:48:18,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1735 transitions. [2018-10-24 11:48:18,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2018-10-24 11:48:18,951 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:48:18,951 INFO L375 BasicCegarLoop]: trace histogram [43, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 33, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:48:18,951 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:48:18,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:48:18,951 INFO L82 PathProgramCache]: Analyzing trace with hash -859740494, now seen corresponding path program 30 times [2018-10-24 11:48:18,952 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:48:18,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:48:18,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:48:18,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:48:18,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:48:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:48:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7578 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 4872 trivial. 0 not checked. [2018-10-24 11:48:20,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:48:20,469 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:48:20,476 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:48:22,328 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-24 11:48:22,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:48:22,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:48:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7578 backedges. 802 proven. 470 refuted. 0 times theorem prover too weak. 6306 trivial. 0 not checked. [2018-10-24 11:48:22,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:48:22,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 15] total 49 [2018-10-24 11:48:22,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-24 11:48:22,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-24 11:48:22,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=1641, Unknown=0, NotChecked=0, Total=2352 [2018-10-24 11:48:22,854 INFO L87 Difference]: Start difference. First operand 1397 states and 1735 transitions. Second operand 49 states. [2018-10-24 11:48:33,533 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 Received shutdown request... [2018-10-24 11:49:05,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 366 states. [2018-10-24 11:49:05,697 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 11:49:05,702 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 11:49:05,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:49:05 BoogieIcfgContainer [2018-10-24 11:49:05,703 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 11:49:05,704 INFO L168 Benchmark]: Toolchain (without parser) took 242855.91 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 3.5 GB in the end (delta: -2.1 GB). Peak memory consumption was 510.7 MB. Max. memory is 7.1 GB. [2018-10-24 11:49:05,705 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 11:49:05,705 INFO L168 Benchmark]: CACSL2BoogieTranslator took 396.61 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-24 11:49:05,706 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-24 11:49:05,706 INFO L168 Benchmark]: Boogie Preprocessor took 33.45 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 11:49:05,707 INFO L168 Benchmark]: RCFGBuilder took 790.26 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 739.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -778.5 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2018-10-24 11:49:05,707 INFO L168 Benchmark]: TraceAbstraction took 241574.11 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.2 GB in the beginning and 3.5 GB in the end (delta: -1.3 GB). Peak memory consumption was 528.7 MB. Max. memory is 7.1 GB. [2018-10-24 11:49:05,711 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 396.61 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 55.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.45 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 790.26 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 739.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -778.5 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 241574.11 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 2.2 GB in the beginning and 3.5 GB in the end (delta: -1.3 GB). Peak memory consumption was 528.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 4]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 4). Cancelled while BasicCegarLoop was constructing difference of abstraction (1397states) and FLOYD_HOARE automaton (currently 366 states, 49 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 379 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 66 locations, 1 error locations. TIMEOUT Result, 241.5s OverallTime, 35 OverallIterations, 43 TraceHistogramMax, 195.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1628 SDtfs, 271679 SDslu, 25050 SDs, 0 SdLazy, 8591 SolverSat, 12063 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12797 GetRequests, 10316 SyntacticMatches, 10 SemanticMatches, 2470 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235214 ImplicationChecksByTransitivity, 137.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1397occurred in iteration=34, 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: 4.4s AutomataMinimizationTime, 34 MinimizatonAttempts, 41293 StatesRemovedByMinimization, 33 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 10.1s SatisfiabilityAnalysisTime, 27.4s InterpolantComputationTime, 17714 NumberOfCodeBlocks, 16550 NumberOfCodeBlocksAsserted, 280 NumberOfCheckSat, 17646 ConstructedInterpolants, 0 QuantifiedInterpolants, 10922734 SizeOfPredicates, 65 NumberOfNonLiveVariables, 18402 ConjunctsInSsa, 560 ConjunctsInUnsatCore, 68 InterpolantComputations, 3 PerfectInterpolantSequences, 118598/173184 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown