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/loop-invgen/up_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:49:42,454 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:49:42,456 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:49:42,467 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:49:42,468 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:49:42,469 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:49:42,470 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:49:42,472 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:49:42,473 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:49:42,474 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:49:42,475 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:49:42,475 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:49:42,476 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:49:42,477 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:49:42,478 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:49:42,479 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:49:42,480 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:49:42,482 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:49:42,484 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:49:42,485 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:49:42,486 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:49:42,488 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:49:42,490 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:49:42,499 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 [2018-10-22 15:49:42,514 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:49:42,514 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:49:42,515 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:49:42,515 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:49:42,516 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:49:42,516 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:49:42,516 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:49:42,516 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:49:42,516 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:49:42,517 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:49:42,517 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:49:42,517 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:49:42,517 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:49:42,517 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:49:42,518 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:49:42,518 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:49:42,518 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:49:42,518 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:49:42,518 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:49:42,519 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:49:42,519 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:49:42,519 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:49:42,519 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:49:42,519 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:49:42,520 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:49:42,520 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:49:42,520 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:49:42,520 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:49:42,570 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:49:42,582 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:49:42,586 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:49:42,588 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:49:42,588 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:49:42,589 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/up_true-unreach-call_true-termination.i [2018-10-22 15:49:42,646 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f3a1c6fe2/b23e531134a44137938cdc76010f47f3/FLAG98e0e5bd7 [2018-10-22 15:49:43,064 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:49:43,065 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/up_true-unreach-call_true-termination.i [2018-10-22 15:49:43,071 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f3a1c6fe2/b23e531134a44137938cdc76010f47f3/FLAG98e0e5bd7 [2018-10-22 15:49:43,089 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/f3a1c6fe2/b23e531134a44137938cdc76010f47f3 [2018-10-22 15:49:43,101 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:49:43,103 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:49:43,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:49:43,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:49:43,108 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:49:43,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:49:43" (1/1) ... [2018-10-22 15:49:43,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57886b46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:43, skipping insertion in model container [2018-10-22 15:49:43,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:49:43" (1/1) ... [2018-10-22 15:49:43,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:49:43,150 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:49:43,360 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:49:43,364 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:49:43,384 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:49:43,400 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:49:43,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:43 WrapperNode [2018-10-22 15:49:43,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:49:43,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:49:43,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:49:43,405 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:49:43,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:43" (1/1) ... [2018-10-22 15:49:43,418 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:43" (1/1) ... [2018-10-22 15:49:43,434 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:49:43,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:49:43,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:49:43,435 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:49:43,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:43" (1/1) ... [2018-10-22 15:49:43,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:43" (1/1) ... [2018-10-22 15:49:43,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:43" (1/1) ... [2018-10-22 15:49:43,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:43" (1/1) ... [2018-10-22 15:49:43,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:43" (1/1) ... [2018-10-22 15:49:43,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:43" (1/1) ... [2018-10-22 15:49:43,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:43" (1/1) ... [2018-10-22 15:49:43,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:49:43,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:49:43,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:49:43,454 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:49:43,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:43" (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 [2018-10-22 15:49:43,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:49:43,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:49:43,819 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:49:43,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:49:43 BoogieIcfgContainer [2018-10-22 15:49:43,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:49:43,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:49:43,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:49:43,838 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:49:43,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:49:43" (1/3) ... [2018-10-22 15:49:43,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230d382a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:49:43, skipping insertion in model container [2018-10-22 15:49:43,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:49:43" (2/3) ... [2018-10-22 15:49:43,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230d382a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:49:43, skipping insertion in model container [2018-10-22 15:49:43,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:49:43" (3/3) ... [2018-10-22 15:49:43,845 INFO L112 eAbstractionObserver]: Analyzing ICFG up_true-unreach-call_true-termination.i [2018-10-22 15:49:43,859 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:49:43,868 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:49:43,902 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:49:43,940 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:49:43,941 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:49:43,941 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:49:43,941 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:49:43,941 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:49:43,941 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:49:43,942 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:49:43,942 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:49:43,942 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:49:43,957 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-10-22 15:49:43,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-22 15:49:43,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:43,965 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:43,967 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:43,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:43,973 INFO L82 PathProgramCache]: Analyzing trace with hash 383759085, now seen corresponding path program 1 times [2018-10-22 15:49:43,975 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:43,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:44,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:44,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:44,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:44,073 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:49:44,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:49:44,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:49:44,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:49:44,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:49:44,096 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2018-10-22 15:49:44,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:44,113 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2018-10-22 15:49:44,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:49:44,115 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-10-22 15:49:44,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:44,125 INFO L225 Difference]: With dead ends: 24 [2018-10-22 15:49:44,126 INFO L226 Difference]: Without dead ends: 11 [2018-10-22 15:49:44,129 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 [2018-10-22 15:49:44,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-22 15:49:44,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-22 15:49:44,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-22 15:49:44,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-22 15:49:44,163 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-22 15:49:44,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:44,164 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-22 15:49:44,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:49:44,164 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-22 15:49:44,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-22 15:49:44,165 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:44,165 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:44,165 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:44,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:44,166 INFO L82 PathProgramCache]: Analyzing trace with hash 325884241, now seen corresponding path program 1 times [2018-10-22 15:49:44,166 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:44,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:44,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:44,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:44,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:44,271 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:49:44,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:49:44,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:49:44,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:49:44,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:49:44,274 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2018-10-22 15:49:44,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:44,418 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2018-10-22 15:49:44,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:49:44,419 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-10-22 15:49:44,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:44,420 INFO L225 Difference]: With dead ends: 22 [2018-10-22 15:49:44,420 INFO L226 Difference]: Without dead ends: 13 [2018-10-22 15:49:44,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:49:44,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-22 15:49:44,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-22 15:49:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-22 15:49:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-22 15:49:44,425 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-10-22 15:49:44,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:44,425 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-22 15:49:44,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:49:44,426 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-22 15:49:44,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 15:49:44,426 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:44,427 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:44,427 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:44,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:44,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1748104565, now seen corresponding path program 1 times [2018-10-22 15:49:44,428 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:44,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:44,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:44,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:44,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:44,521 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:49:44,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:49:44,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:49:44,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:49:44,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:49:44,523 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2018-10-22 15:49:44,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:44,695 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-22 15:49:44,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:49:44,696 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-22 15:49:44,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:44,697 INFO L225 Difference]: With dead ends: 25 [2018-10-22 15:49:44,697 INFO L226 Difference]: Without dead ends: 23 [2018-10-22 15:49:44,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:49:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-22 15:49:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-10-22 15:49:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 15:49:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-22 15:49:44,702 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2018-10-22 15:49:44,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:44,702 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-22 15:49:44,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:49:44,702 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-22 15:49:44,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 15:49:44,703 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:44,703 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:44,704 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:44,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:44,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1639575084, now seen corresponding path program 1 times [2018-10-22 15:49:44,704 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:44,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:44,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:44,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:44,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:44,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:44,964 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 [2018-10-22 15:49:44,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:45,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:45,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:45,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-10-22 15:49:45,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:49:45,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:49:45,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:49:45,145 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 9 states. [2018-10-22 15:49:45,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:45,397 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-10-22 15:49:45,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:49:45,397 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-22 15:49:45,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:45,398 INFO L225 Difference]: With dead ends: 31 [2018-10-22 15:49:45,398 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 15:49:45,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:49:45,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 15:49:45,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-22 15:49:45,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 15:49:45,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-22 15:49:45,403 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2018-10-22 15:49:45,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:45,403 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-22 15:49:45,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:49:45,403 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-22 15:49:45,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-22 15:49:45,404 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:45,404 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:45,404 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:45,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:45,405 INFO L82 PathProgramCache]: Analyzing trace with hash 842542990, now seen corresponding path program 2 times [2018-10-22 15:49:45,405 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:45,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:45,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:45,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:45,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:45,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:45,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:45,532 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 [2018-10-22 15:49:45,545 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:49:45,558 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:49:45,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:45,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:45,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:45,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-10-22 15:49:45,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:49:45,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:49:45,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:49:45,624 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2018-10-22 15:49:45,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:45,986 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-22 15:49:45,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:49:45,986 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-10-22 15:49:45,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:45,988 INFO L225 Difference]: With dead ends: 31 [2018-10-22 15:49:45,988 INFO L226 Difference]: Without dead ends: 29 [2018-10-22 15:49:45,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:49:45,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-22 15:49:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-10-22 15:49:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-22 15:49:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-22 15:49:45,994 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2018-10-22 15:49:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:45,995 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-22 15:49:45,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:49:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-22 15:49:45,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 15:49:45,996 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:45,996 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:45,996 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:45,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:45,997 INFO L82 PathProgramCache]: Analyzing trace with hash -46138025, now seen corresponding path program 3 times [2018-10-22 15:49:45,997 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:45,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:45,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:45,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:45,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:46,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:46,253 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 [2018-10-22 15:49:46,260 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:49:46,274 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-22 15:49:46,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:46,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:46,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:46,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-10-22 15:49:46,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:49:46,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:49:46,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:49:46,439 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 12 states. [2018-10-22 15:49:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:46,605 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-10-22 15:49:46,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:49:46,607 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-22 15:49:46,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:46,608 INFO L225 Difference]: With dead ends: 41 [2018-10-22 15:49:46,609 INFO L226 Difference]: Without dead ends: 24 [2018-10-22 15:49:46,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:49:46,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-22 15:49:46,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-22 15:49:46,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-22 15:49:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-22 15:49:46,614 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2018-10-22 15:49:46,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:46,615 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-22 15:49:46,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:49:46,615 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-22 15:49:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-22 15:49:46,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:46,616 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:46,616 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:46,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:46,617 INFO L82 PathProgramCache]: Analyzing trace with hash -676370543, now seen corresponding path program 4 times [2018-10-22 15:49:46,617 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:46,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:46,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:46,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:46,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:46,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:46,768 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 [2018-10-22 15:49:46,783 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:49:46,802 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:49:46,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:46,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:46,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:46,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-22 15:49:46,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:49:46,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:49:46,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:49:46,883 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2018-10-22 15:49:47,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:47,068 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-22 15:49:47,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:49:47,069 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2018-10-22 15:49:47,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:47,070 INFO L225 Difference]: With dead ends: 37 [2018-10-22 15:49:47,071 INFO L226 Difference]: Without dead ends: 35 [2018-10-22 15:49:47,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:49:47,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-22 15:49:47,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-10-22 15:49:47,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-22 15:49:47,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-10-22 15:49:47,078 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2018-10-22 15:49:47,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:47,078 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-10-22 15:49:47,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:49:47,079 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-10-22 15:49:47,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-22 15:49:47,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:47,080 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:47,080 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:47,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:47,080 INFO L82 PathProgramCache]: Analyzing trace with hash 612727770, now seen corresponding path program 5 times [2018-10-22 15:49:47,081 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:47,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:47,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:47,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:47,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:47,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:47,339 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 [2018-10-22 15:49:47,348 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:49:47,364 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-22 15:49:47,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:47,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:47,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:47,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2018-10-22 15:49:47,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:49:47,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:49:47,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:49:47,511 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 15 states. [2018-10-22 15:49:47,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:47,713 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-10-22 15:49:47,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:49:47,714 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2018-10-22 15:49:47,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:47,715 INFO L225 Difference]: With dead ends: 51 [2018-10-22 15:49:47,715 INFO L226 Difference]: Without dead ends: 30 [2018-10-22 15:49:47,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:49:47,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-22 15:49:47,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-22 15:49:47,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-22 15:49:47,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-10-22 15:49:47,721 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2018-10-22 15:49:47,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:47,721 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-10-22 15:49:47,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:49:47,722 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-10-22 15:49:47,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-22 15:49:47,723 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:47,723 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:47,723 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:47,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:47,723 INFO L82 PathProgramCache]: Analyzing trace with hash -2140745068, now seen corresponding path program 6 times [2018-10-22 15:49:47,724 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:47,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:47,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:47,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:47,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:47,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:47,862 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 [2018-10-22 15:49:47,870 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:49:47,900 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-22 15:49:47,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:47,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:47,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:47,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-10-22 15:49:47,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:49:47,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:49:47,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:49:47,976 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-10-22 15:49:48,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:48,411 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-10-22 15:49:48,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:49:48,411 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2018-10-22 15:49:48,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:48,412 INFO L225 Difference]: With dead ends: 43 [2018-10-22 15:49:48,412 INFO L226 Difference]: Without dead ends: 41 [2018-10-22 15:49:48,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:49:48,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-22 15:49:48,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2018-10-22 15:49:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-22 15:49:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-10-22 15:49:48,419 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2018-10-22 15:49:48,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:48,419 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-10-22 15:49:48,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:49:48,419 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-10-22 15:49:48,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-22 15:49:48,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:48,420 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:48,421 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:48,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:48,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2109320541, now seen corresponding path program 7 times [2018-10-22 15:49:48,421 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:48,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:48,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:48,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:48,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:48,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:48,587 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 [2018-10-22 15:49:48,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:48,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:48,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:48,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2018-10-22 15:49:48,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:49:48,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:49:48,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:49:48,762 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 18 states. [2018-10-22 15:49:48,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:48,962 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2018-10-22 15:49:48,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:49:48,962 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-10-22 15:49:48,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:48,964 INFO L225 Difference]: With dead ends: 61 [2018-10-22 15:49:48,964 INFO L226 Difference]: Without dead ends: 36 [2018-10-22 15:49:48,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:49:48,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-22 15:49:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-22 15:49:48,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-22 15:49:48,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-22 15:49:48,973 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2018-10-22 15:49:48,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:48,973 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-22 15:49:48,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:49:48,973 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-22 15:49:48,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-22 15:49:48,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:48,974 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:48,975 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:48,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:48,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1946783895, now seen corresponding path program 8 times [2018-10-22 15:49:48,975 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:48,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:48,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:48,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:48,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:49,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:49,172 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 [2018-10-22 15:49:49,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:49:49,196 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:49:49,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:49,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:49,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:49,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-22 15:49:49,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:49:49,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:49:49,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:49:49,268 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 11 states. [2018-10-22 15:49:49,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:49,445 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-22 15:49:49,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:49:49,455 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2018-10-22 15:49:49,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:49,459 INFO L225 Difference]: With dead ends: 49 [2018-10-22 15:49:49,459 INFO L226 Difference]: Without dead ends: 47 [2018-10-22 15:49:49,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:49:49,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-22 15:49:49,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2018-10-22 15:49:49,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-22 15:49:49,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-10-22 15:49:49,469 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2018-10-22 15:49:49,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:49,470 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-10-22 15:49:49,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:49:49,470 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-10-22 15:49:49,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-22 15:49:49,472 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:49,472 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:49,473 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:49,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:49,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1173860832, now seen corresponding path program 9 times [2018-10-22 15:49:49,473 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:49,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:49,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:49,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:49,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:49,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:49,641 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 [2018-10-22 15:49:49,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:49:49,682 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-22 15:49:49,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:49,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:49,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:49,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2018-10-22 15:49:49,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:49:49,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:49:49,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:49:49,968 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 21 states. [2018-10-22 15:49:50,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:50,369 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-10-22 15:49:50,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:49:50,370 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2018-10-22 15:49:50,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:50,370 INFO L225 Difference]: With dead ends: 71 [2018-10-22 15:49:50,371 INFO L226 Difference]: Without dead ends: 42 [2018-10-22 15:49:50,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:49:50,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-22 15:49:50,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-22 15:49:50,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-22 15:49:50,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-10-22 15:49:50,377 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2018-10-22 15:49:50,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:50,378 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-10-22 15:49:50,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:49:50,378 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-10-22 15:49:50,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-22 15:49:50,379 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:50,379 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:50,379 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:50,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:50,379 INFO L82 PathProgramCache]: Analyzing trace with hash 666550682, now seen corresponding path program 10 times [2018-10-22 15:49:50,379 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:50,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:50,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:50,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:50,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:50,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:50,623 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 [2018-10-22 15:49:50,632 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:49:50,680 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:49:50,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:50,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:50,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:50,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-22 15:49:50,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:49:50,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:49:50,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:49:50,895 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 12 states. [2018-10-22 15:49:51,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:51,094 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-10-22 15:49:51,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:49:51,095 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2018-10-22 15:49:51,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:51,096 INFO L225 Difference]: With dead ends: 55 [2018-10-22 15:49:51,096 INFO L226 Difference]: Without dead ends: 53 [2018-10-22 15:49:51,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:49:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-22 15:49:51,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2018-10-22 15:49:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-22 15:49:51,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-10-22 15:49:51,106 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2018-10-22 15:49:51,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:51,107 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-10-22 15:49:51,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:49:51,107 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-10-22 15:49:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-22 15:49:51,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:51,108 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:51,108 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:51,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:51,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1808968035, now seen corresponding path program 11 times [2018-10-22 15:49:51,109 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:51,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:51,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:51,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:51,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:51,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:51,410 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 [2018-10-22 15:49:51,417 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:49:51,444 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-22 15:49:51,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:51,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:51,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:51,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2018-10-22 15:49:51,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 15:49:51,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 15:49:51,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:49:51,659 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 24 states. [2018-10-22 15:49:52,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:52,161 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-10-22 15:49:52,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:49:52,161 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2018-10-22 15:49:52,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:52,162 INFO L225 Difference]: With dead ends: 81 [2018-10-22 15:49:52,162 INFO L226 Difference]: Without dead ends: 48 [2018-10-22 15:49:52,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:49:52,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-22 15:49:52,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-22 15:49:52,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-22 15:49:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-22 15:49:52,170 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2018-10-22 15:49:52,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:52,170 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-22 15:49:52,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 15:49:52,170 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-22 15:49:52,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-22 15:49:52,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:52,171 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:52,171 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:52,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:52,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1676311139, now seen corresponding path program 12 times [2018-10-22 15:49:52,172 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:52,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:52,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:52,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:52,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:52,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:52,387 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 [2018-10-22 15:49:52,395 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:49:52,462 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-22 15:49:52,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:52,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:52,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:52,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-22 15:49:52,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:49:52,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:49:52,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:49:52,516 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 13 states. [2018-10-22 15:49:52,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:52,782 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-22 15:49:52,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:49:52,782 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2018-10-22 15:49:52,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:52,783 INFO L225 Difference]: With dead ends: 61 [2018-10-22 15:49:52,783 INFO L226 Difference]: Without dead ends: 59 [2018-10-22 15:49:52,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:49:52,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-22 15:49:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2018-10-22 15:49:52,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-22 15:49:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-10-22 15:49:52,791 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2018-10-22 15:49:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:52,792 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-10-22 15:49:52,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:49:52,792 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-10-22 15:49:52,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-22 15:49:52,793 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:52,793 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:52,793 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:52,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:52,793 INFO L82 PathProgramCache]: Analyzing trace with hash -313150490, now seen corresponding path program 13 times [2018-10-22 15:49:52,794 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:52,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:52,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:52,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:52,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:53,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:53,222 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 [2018-10-22 15:49:53,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:53,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:53,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:53,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2018-10-22 15:49:53,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 15:49:53,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 15:49:53,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:49:53,561 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 27 states. [2018-10-22 15:49:53,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:53,805 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-10-22 15:49:53,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-22 15:49:53,805 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2018-10-22 15:49:53,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:53,806 INFO L225 Difference]: With dead ends: 91 [2018-10-22 15:49:53,806 INFO L226 Difference]: Without dead ends: 54 [2018-10-22 15:49:53,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=323, Invalid=937, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:49:53,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-22 15:49:53,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-22 15:49:53,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-22 15:49:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-10-22 15:49:53,815 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2018-10-22 15:49:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:53,815 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-10-22 15:49:53,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 15:49:53,816 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-10-22 15:49:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-22 15:49:53,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:53,816 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:53,817 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:53,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:53,817 INFO L82 PathProgramCache]: Analyzing trace with hash 992804000, now seen corresponding path program 14 times [2018-10-22 15:49:53,817 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:53,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:53,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:53,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:53,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:53,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:53,993 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 [2018-10-22 15:49:54,005 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:49:54,028 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:49:54,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:54,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:54,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:54,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-10-22 15:49:54,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:49:54,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:49:54,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:49:54,113 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 14 states. [2018-10-22 15:49:54,318 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-10-22 15:49:54,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:54,491 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-10-22 15:49:54,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:49:54,491 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-10-22 15:49:54,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:54,492 INFO L225 Difference]: With dead ends: 67 [2018-10-22 15:49:54,493 INFO L226 Difference]: Without dead ends: 65 [2018-10-22 15:49:54,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:49:54,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-22 15:49:54,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2018-10-22 15:49:54,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-22 15:49:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-10-22 15:49:54,507 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2018-10-22 15:49:54,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:54,507 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-10-22 15:49:54,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:49:54,507 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-10-22 15:49:54,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-22 15:49:54,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:54,508 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:54,509 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:54,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:54,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1241255575, now seen corresponding path program 15 times [2018-10-22 15:49:54,515 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:54,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:54,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:54,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:54,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:54,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:54,839 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 [2018-10-22 15:49:54,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:49:54,887 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-22 15:49:54,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:54,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:55,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:55,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2018-10-22 15:49:55,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-22 15:49:55,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-22 15:49:55,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:49:55,134 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 30 states. [2018-10-22 15:49:55,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:55,422 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-10-22 15:49:55,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 15:49:55,422 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 57 [2018-10-22 15:49:55,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:55,423 INFO L225 Difference]: With dead ends: 101 [2018-10-22 15:49:55,423 INFO L226 Difference]: Without dead ends: 60 [2018-10-22 15:49:55,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=1166, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:49:55,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-22 15:49:55,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-22 15:49:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-22 15:49:55,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-10-22 15:49:55,431 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2018-10-22 15:49:55,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:55,431 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-10-22 15:49:55,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-22 15:49:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-10-22 15:49:55,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-22 15:49:55,432 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:55,432 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:55,433 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:55,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:55,433 INFO L82 PathProgramCache]: Analyzing trace with hash 915162787, now seen corresponding path program 16 times [2018-10-22 15:49:55,433 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:55,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:55,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:55,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:55,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:55,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:55,720 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 [2018-10-22 15:49:55,727 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:49:55,753 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:49:55,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:55,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:55,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:55,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-22 15:49:55,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:49:55,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:49:55,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:49:55,801 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 15 states. [2018-10-22 15:49:56,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:56,149 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-22 15:49:56,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 15:49:56,150 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2018-10-22 15:49:56,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:56,150 INFO L225 Difference]: With dead ends: 73 [2018-10-22 15:49:56,150 INFO L226 Difference]: Without dead ends: 71 [2018-10-22 15:49:56,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:49:56,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-22 15:49:56,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2018-10-22 15:49:56,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-22 15:49:56,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-10-22 15:49:56,161 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2018-10-22 15:49:56,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:56,161 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-10-22 15:49:56,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:49:56,161 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-10-22 15:49:56,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-22 15:49:56,162 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:56,162 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:56,162 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:56,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:56,163 INFO L82 PathProgramCache]: Analyzing trace with hash -52919828, now seen corresponding path program 17 times [2018-10-22 15:49:56,163 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:56,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:56,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:56,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:56,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:56,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:56,790 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 [2018-10-22 15:49:56,798 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:49:56,831 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-22 15:49:56,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:56,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:57,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:57,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2018-10-22 15:49:57,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:49:57,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:49:57,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:49:57,509 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 33 states. [2018-10-22 15:49:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:57,972 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-10-22 15:49:57,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:49:57,973 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 63 [2018-10-22 15:49:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:57,973 INFO L225 Difference]: With dead ends: 111 [2018-10-22 15:49:57,973 INFO L226 Difference]: Without dead ends: 66 [2018-10-22 15:49:57,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=472, Invalid=1420, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:49:57,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-22 15:49:57,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-22 15:49:57,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-22 15:49:57,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-10-22 15:49:57,984 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 63 [2018-10-22 15:49:57,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:57,984 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-10-22 15:49:57,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 15:49:57,984 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-10-22 15:49:57,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-22 15:49:57,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:57,985 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:57,986 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:57,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:57,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1698071462, now seen corresponding path program 18 times [2018-10-22 15:49:57,986 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:57,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:57,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:57,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:57,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:58,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:58,828 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 [2018-10-22 15:49:58,837 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:49:58,913 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-22 15:49:58,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:58,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:59,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:59,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-22 15:49:59,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:49:59,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:49:59,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:49:59,042 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 16 states. [2018-10-22 15:49:59,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:59,343 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-10-22 15:49:59,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:49:59,343 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2018-10-22 15:49:59,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:59,344 INFO L225 Difference]: With dead ends: 79 [2018-10-22 15:49:59,345 INFO L226 Difference]: Without dead ends: 77 [2018-10-22 15:49:59,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=277, Invalid=479, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:49:59,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-22 15:49:59,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2018-10-22 15:49:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-22 15:49:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-10-22 15:49:59,353 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2018-10-22 15:49:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:59,354 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-10-22 15:49:59,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:49:59,354 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-10-22 15:49:59,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-22 15:49:59,354 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:59,354 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:59,354 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:59,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:59,355 INFO L82 PathProgramCache]: Analyzing trace with hash 575047023, now seen corresponding path program 19 times [2018-10-22 15:49:59,355 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:59,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:59,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:59,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:59,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:59,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:59,756 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 [2018-10-22 15:49:59,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:59,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:00,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:00,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2018-10-22 15:50:00,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-22 15:50:00,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-22 15:50:00,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:50:00,092 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 36 states. [2018-10-22 15:50:01,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:01,019 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2018-10-22 15:50:01,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-22 15:50:01,020 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 69 [2018-10-22 15:50:01,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:01,021 INFO L225 Difference]: With dead ends: 121 [2018-10-22 15:50:01,023 INFO L226 Difference]: Without dead ends: 72 [2018-10-22 15:50:01,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=557, Invalid=1699, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:50:01,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-22 15:50:01,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-22 15:50:01,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-22 15:50:01,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-10-22 15:50:01,034 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2018-10-22 15:50:01,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:01,035 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-10-22 15:50:01,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-22 15:50:01,035 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-10-22 15:50:01,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-22 15:50:01,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:01,036 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:01,036 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:01,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:01,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1582902359, now seen corresponding path program 20 times [2018-10-22 15:50:01,036 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:01,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:01,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:01,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:01,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:01,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:01,453 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 [2018-10-22 15:50:01,461 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:01,491 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:01,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:01,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:01,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:01,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-22 15:50:01,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:50:01,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:50:01,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:50:01,621 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 17 states. [2018-10-22 15:50:01,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:01,908 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-22 15:50:01,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 15:50:01,908 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2018-10-22 15:50:01,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:01,909 INFO L225 Difference]: With dead ends: 85 [2018-10-22 15:50:01,909 INFO L226 Difference]: Without dead ends: 83 [2018-10-22 15:50:01,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=319, Invalid=551, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:50:01,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-22 15:50:01,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2018-10-22 15:50:01,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-22 15:50:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-10-22 15:50:01,917 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2018-10-22 15:50:01,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:01,917 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-10-22 15:50:01,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:50:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-10-22 15:50:01,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-22 15:50:01,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:01,919 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:01,919 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:01,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:01,919 INFO L82 PathProgramCache]: Analyzing trace with hash 238623730, now seen corresponding path program 21 times [2018-10-22 15:50:01,919 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:01,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:01,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:01,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:01,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:02,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:02,261 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 [2018-10-22 15:50:02,269 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:02,308 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-22 15:50:02,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:02,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:02,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:02,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39 [2018-10-22 15:50:02,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-22 15:50:02,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-22 15:50:02,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:50:02,990 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 39 states. [2018-10-22 15:50:03,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:03,397 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-10-22 15:50:03,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 15:50:03,397 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 75 [2018-10-22 15:50:03,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:03,398 INFO L225 Difference]: With dead ends: 131 [2018-10-22 15:50:03,398 INFO L226 Difference]: Without dead ends: 78 [2018-10-22 15:50:03,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=649, Invalid=2003, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:50:03,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-22 15:50:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-22 15:50:03,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-22 15:50:03,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-10-22 15:50:03,408 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2018-10-22 15:50:03,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:03,408 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-10-22 15:50:03,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-22 15:50:03,408 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-10-22 15:50:03,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-22 15:50:03,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:03,409 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:03,409 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:03,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:03,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1479518548, now seen corresponding path program 22 times [2018-10-22 15:50:03,410 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:03,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:03,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:03,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:03,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:03,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:03,621 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 [2018-10-22 15:50:03,639 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:03,695 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:03,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:03,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:03,944 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:03,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:03,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-10-22 15:50:03,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:50:03,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:50:03,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:50:03,978 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 18 states. [2018-10-22 15:50:04,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:04,338 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-10-22 15:50:04,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 15:50:04,340 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2018-10-22 15:50:04,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:04,341 INFO L225 Difference]: With dead ends: 91 [2018-10-22 15:50:04,341 INFO L226 Difference]: Without dead ends: 89 [2018-10-22 15:50:04,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=364, Invalid=628, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:50:04,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-22 15:50:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2018-10-22 15:50:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-22 15:50:04,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-10-22 15:50:04,351 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2018-10-22 15:50:04,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:04,351 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-10-22 15:50:04,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:50:04,352 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-10-22 15:50:04,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-22 15:50:04,352 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:04,353 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:04,353 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:04,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:04,353 INFO L82 PathProgramCache]: Analyzing trace with hash 236152181, now seen corresponding path program 23 times [2018-10-22 15:50:04,353 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:04,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:04,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:04,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:04,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:04,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:04,845 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 [2018-10-22 15:50:04,853 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:04,905 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-22 15:50:04,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:04,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:05,333 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:05,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:05,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 42 [2018-10-22 15:50:05,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-22 15:50:05,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-22 15:50:05,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:50:05,355 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 42 states. [2018-10-22 15:50:05,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:05,897 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-10-22 15:50:05,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:50:05,897 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 81 [2018-10-22 15:50:05,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:05,898 INFO L225 Difference]: With dead ends: 141 [2018-10-22 15:50:05,898 INFO L226 Difference]: Without dead ends: 84 [2018-10-22 15:50:05,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=748, Invalid=2332, Unknown=0, NotChecked=0, Total=3080 [2018-10-22 15:50:05,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-22 15:50:05,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-22 15:50:05,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-22 15:50:05,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-10-22 15:50:05,908 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2018-10-22 15:50:05,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:05,908 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-10-22 15:50:05,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-22 15:50:05,908 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-10-22 15:50:05,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-22 15:50:05,909 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:05,909 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:05,909 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:05,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:05,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1931357359, now seen corresponding path program 24 times [2018-10-22 15:50:05,909 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:05,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:05,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:05,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:05,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 182 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:06,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:06,247 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 [2018-10-22 15:50:06,256 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:06,306 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-22 15:50:06,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:06,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 182 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:06,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:06,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-10-22 15:50:06,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:50:06,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:50:06,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:50:06,379 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 19 states. [2018-10-22 15:50:06,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:06,743 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-22 15:50:06,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 15:50:06,744 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2018-10-22 15:50:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:06,744 INFO L225 Difference]: With dead ends: 97 [2018-10-22 15:50:06,744 INFO L226 Difference]: Without dead ends: 95 [2018-10-22 15:50:06,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=412, Invalid=710, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:50:06,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-22 15:50:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2018-10-22 15:50:06,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-22 15:50:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-10-22 15:50:06,756 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2018-10-22 15:50:06,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:06,756 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-10-22 15:50:06,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:50:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-10-22 15:50:06,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-22 15:50:06,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:06,757 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:06,757 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:06,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:06,757 INFO L82 PathProgramCache]: Analyzing trace with hash 850428408, now seen corresponding path program 25 times [2018-10-22 15:50:06,758 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:06,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:06,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:06,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:06,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 351 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:07,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:07,170 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 [2018-10-22 15:50:07,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:07,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 351 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:07,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:07,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 45 [2018-10-22 15:50:07,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-22 15:50:07,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-22 15:50:07,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=1501, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:50:07,651 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 45 states. [2018-10-22 15:50:08,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:08,193 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-10-22 15:50:08,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 15:50:08,193 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 87 [2018-10-22 15:50:08,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:08,194 INFO L225 Difference]: With dead ends: 151 [2018-10-22 15:50:08,194 INFO L226 Difference]: Without dead ends: 90 [2018-10-22 15:50:08,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=854, Invalid=2686, Unknown=0, NotChecked=0, Total=3540 [2018-10-22 15:50:08,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-22 15:50:08,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-22 15:50:08,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-22 15:50:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-10-22 15:50:08,205 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 87 [2018-10-22 15:50:08,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:08,205 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-10-22 15:50:08,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-22 15:50:08,205 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-10-22 15:50:08,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-22 15:50:08,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:08,206 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:08,206 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:08,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:08,206 INFO L82 PathProgramCache]: Analyzing trace with hash 477328818, now seen corresponding path program 26 times [2018-10-22 15:50:08,206 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:08,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:08,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:08,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:08,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 210 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:08,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:08,515 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 [2018-10-22 15:50:08,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:08,564 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:08,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:08,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 210 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:08,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:08,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-10-22 15:50:08,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:50:08,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:50:08,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:50:08,621 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 20 states. [2018-10-22 15:50:08,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:08,907 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-10-22 15:50:08,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-22 15:50:08,907 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2018-10-22 15:50:08,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:08,908 INFO L225 Difference]: With dead ends: 103 [2018-10-22 15:50:08,908 INFO L226 Difference]: Without dead ends: 101 [2018-10-22 15:50:08,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=463, Invalid=797, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:50:08,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-22 15:50:08,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2018-10-22 15:50:08,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-22 15:50:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-10-22 15:50:08,920 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 89 [2018-10-22 15:50:08,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:08,920 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-10-22 15:50:08,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:50:08,920 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-10-22 15:50:08,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-22 15:50:08,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:08,921 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:08,921 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:08,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:08,921 INFO L82 PathProgramCache]: Analyzing trace with hash 778277243, now seen corresponding path program 27 times [2018-10-22 15:50:08,921 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:08,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:08,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:08,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:08,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 406 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:09,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:09,381 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 [2018-10-22 15:50:09,389 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:09,445 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-22 15:50:09,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:09,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 406 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:09,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:09,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 48 [2018-10-22 15:50:09,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-22 15:50:09,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-22 15:50:09,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:50:09,902 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 48 states. [2018-10-22 15:50:10,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:10,499 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-10-22 15:50:10,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-22 15:50:10,499 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 93 [2018-10-22 15:50:10,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:10,501 INFO L225 Difference]: With dead ends: 161 [2018-10-22 15:50:10,501 INFO L226 Difference]: Without dead ends: 96 [2018-10-22 15:50:10,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=967, Invalid=3065, Unknown=0, NotChecked=0, Total=4032 [2018-10-22 15:50:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-22 15:50:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-22 15:50:10,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-22 15:50:10,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-10-22 15:50:10,517 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 93 [2018-10-22 15:50:10,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:10,517 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-10-22 15:50:10,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-22 15:50:10,518 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-10-22 15:50:10,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-22 15:50:10,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:10,518 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:10,519 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:10,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:10,519 INFO L82 PathProgramCache]: Analyzing trace with hash 942363061, now seen corresponding path program 28 times [2018-10-22 15:50:10,519 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:10,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:10,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:10,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:10,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 240 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:11,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:11,438 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 [2018-10-22 15:50:11,446 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:11,482 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:11,482 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:11,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 240 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:11,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:11,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-10-22 15:50:11,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:50:11,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:50:11,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:50:11,548 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 21 states. [2018-10-22 15:50:11,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:11,908 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-22 15:50:11,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-22 15:50:11,908 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 95 [2018-10-22 15:50:11,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:11,909 INFO L225 Difference]: With dead ends: 109 [2018-10-22 15:50:11,909 INFO L226 Difference]: Without dead ends: 107 [2018-10-22 15:50:11,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=517, Invalid=889, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:50:11,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-22 15:50:11,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2018-10-22 15:50:11,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-22 15:50:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-10-22 15:50:11,923 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2018-10-22 15:50:11,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:11,923 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-10-22 15:50:11,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:50:11,923 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-10-22 15:50:11,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-22 15:50:11,923 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:11,924 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:11,924 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:11,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:11,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1292389378, now seen corresponding path program 29 times [2018-10-22 15:50:11,924 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:11,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:11,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:11,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:11,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 465 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:12,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:12,372 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 [2018-10-22 15:50:12,379 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:12,578 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-22 15:50:12,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:12,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 465 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:13,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:13,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 51 [2018-10-22 15:50:13,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-22 15:50:13,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-22 15:50:13,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=1939, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 15:50:13,126 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 51 states. [2018-10-22 15:50:13,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:13,693 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-10-22 15:50:13,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 15:50:13,693 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 99 [2018-10-22 15:50:13,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:13,694 INFO L225 Difference]: With dead ends: 171 [2018-10-22 15:50:13,694 INFO L226 Difference]: Without dead ends: 102 [2018-10-22 15:50:13,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1087, Invalid=3469, Unknown=0, NotChecked=0, Total=4556 [2018-10-22 15:50:13,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-22 15:50:13,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-22 15:50:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-22 15:50:13,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-10-22 15:50:13,711 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2018-10-22 15:50:13,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:13,711 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-10-22 15:50:13,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-22 15:50:13,712 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-10-22 15:50:13,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-22 15:50:13,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:13,712 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:13,712 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:13,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:13,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1273438024, now seen corresponding path program 30 times [2018-10-22 15:50:13,713 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:13,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:13,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:13,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:13,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 272 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:14,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:14,038 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 [2018-10-22 15:50:14,047 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:14,104 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-22 15:50:14,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:14,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 272 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:14,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:14,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-10-22 15:50:14,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:50:14,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:50:14,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:50:14,197 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 22 states. [2018-10-22 15:50:14,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:14,537 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-10-22 15:50:14,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-22 15:50:14,538 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2018-10-22 15:50:14,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:14,539 INFO L225 Difference]: With dead ends: 115 [2018-10-22 15:50:14,539 INFO L226 Difference]: Without dead ends: 113 [2018-10-22 15:50:14,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=574, Invalid=986, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:50:14,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-22 15:50:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 106. [2018-10-22 15:50:14,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-22 15:50:14,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-10-22 15:50:14,554 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2018-10-22 15:50:14,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:14,554 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-10-22 15:50:14,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:50:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-10-22 15:50:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-22 15:50:14,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:14,555 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:14,555 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:14,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:14,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1336936833, now seen corresponding path program 31 times [2018-10-22 15:50:14,556 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:14,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:14,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:14,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:14,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 528 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:15,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:15,207 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 [2018-10-22 15:50:15,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:15,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 528 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:15,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:15,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 54 [2018-10-22 15:50:15,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-22 15:50:15,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-22 15:50:15,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2018-10-22 15:50:15,911 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 54 states. [2018-10-22 15:50:17,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:17,643 INFO L93 Difference]: Finished difference Result 181 states and 183 transitions. [2018-10-22 15:50:17,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-22 15:50:17,643 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 105 [2018-10-22 15:50:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:17,644 INFO L225 Difference]: With dead ends: 181 [2018-10-22 15:50:17,644 INFO L226 Difference]: Without dead ends: 108 [2018-10-22 15:50:17,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1214, Invalid=3898, Unknown=0, NotChecked=0, Total=5112 [2018-10-22 15:50:17,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-22 15:50:17,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-22 15:50:17,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-22 15:50:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-10-22 15:50:17,658 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 105 [2018-10-22 15:50:17,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:17,659 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-10-22 15:50:17,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-22 15:50:17,659 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-10-22 15:50:17,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-22 15:50:17,659 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:17,659 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:17,660 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:17,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:17,660 INFO L82 PathProgramCache]: Analyzing trace with hash 898056891, now seen corresponding path program 32 times [2018-10-22 15:50:17,660 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:17,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:17,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:17,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:17,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 306 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:18,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:18,600 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 [2018-10-22 15:50:18,610 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:18,660 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:18,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:18,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 306 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:18,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:18,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-10-22 15:50:18,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:50:18,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:50:18,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:50:18,728 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 23 states. [2018-10-22 15:50:19,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:19,094 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-22 15:50:19,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-22 15:50:19,095 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2018-10-22 15:50:19,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:19,096 INFO L225 Difference]: With dead ends: 121 [2018-10-22 15:50:19,096 INFO L226 Difference]: Without dead ends: 119 [2018-10-22 15:50:19,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=634, Invalid=1088, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:50:19,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-22 15:50:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2018-10-22 15:50:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-22 15:50:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-10-22 15:50:19,112 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2018-10-22 15:50:19,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:19,112 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-10-22 15:50:19,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:50:19,112 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-10-22 15:50:19,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-22 15:50:19,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:19,113 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:19,113 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:19,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:19,113 INFO L82 PathProgramCache]: Analyzing trace with hash -817384956, now seen corresponding path program 33 times [2018-10-22 15:50:19,113 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:19,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:19,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:19,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:19,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 595 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:19,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:19,752 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 [2018-10-22 15:50:19,759 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:19,818 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-22 15:50:19,818 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:19,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 595 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:20,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:20,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 57 [2018-10-22 15:50:20,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-22 15:50:20,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-22 15:50:20,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=2433, Unknown=0, NotChecked=0, Total=3192 [2018-10-22 15:50:20,531 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 57 states. [2018-10-22 15:50:21,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:21,603 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2018-10-22 15:50:21,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-22 15:50:21,603 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 111 [2018-10-22 15:50:21,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:21,604 INFO L225 Difference]: With dead ends: 191 [2018-10-22 15:50:21,604 INFO L226 Difference]: Without dead ends: 114 [2018-10-22 15:50:21,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1348, Invalid=4352, Unknown=0, NotChecked=0, Total=5700 [2018-10-22 15:50:21,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-22 15:50:21,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-22 15:50:21,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-22 15:50:21,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-10-22 15:50:21,620 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 111 [2018-10-22 15:50:21,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:21,620 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-10-22 15:50:21,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-22 15:50:21,620 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-10-22 15:50:21,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-22 15:50:21,621 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:21,621 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:21,621 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:21,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:21,621 INFO L82 PathProgramCache]: Analyzing trace with hash -147220546, now seen corresponding path program 34 times [2018-10-22 15:50:21,621 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:21,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:21,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:21,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:21,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:22,295 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 342 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:22,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:22,295 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:22,302 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:22,354 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:22,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:22,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:22,477 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 342 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:22,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:22,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-10-22 15:50:22,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 15:50:22,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 15:50:22,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:50:22,499 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 24 states. [2018-10-22 15:50:22,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:22,970 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2018-10-22 15:50:22,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-22 15:50:22,970 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2018-10-22 15:50:22,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:22,972 INFO L225 Difference]: With dead ends: 127 [2018-10-22 15:50:22,972 INFO L226 Difference]: Without dead ends: 125 [2018-10-22 15:50:22,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=697, Invalid=1195, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:50:22,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-22 15:50:22,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2018-10-22 15:50:22,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-22 15:50:22,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-10-22 15:50:22,997 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 113 [2018-10-22 15:50:22,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:22,997 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-10-22 15:50:22,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 15:50:22,997 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-10-22 15:50:22,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-22 15:50:22,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:22,998 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:22,998 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:22,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:22,999 INFO L82 PathProgramCache]: Analyzing trace with hash 368168327, now seen corresponding path program 35 times [2018-10-22 15:50:22,999 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:22,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:23,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:23,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:23,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 666 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:23,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:23,905 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:23,912 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:23,978 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-22 15:50:23,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:23,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:26,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 666 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:26,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:26,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 60 [2018-10-22 15:50:26,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-22 15:50:26,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-22 15:50:26,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2018-10-22 15:50:26,141 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 60 states. [2018-10-22 15:50:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:28,857 INFO L93 Difference]: Finished difference Result 201 states and 203 transitions. [2018-10-22 15:50:28,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-22 15:50:28,857 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 117 [2018-10-22 15:50:28,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:28,858 INFO L225 Difference]: With dead ends: 201 [2018-10-22 15:50:28,858 INFO L226 Difference]: Without dead ends: 120 [2018-10-22 15:50:28,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1489, Invalid=4831, Unknown=0, NotChecked=0, Total=6320 [2018-10-22 15:50:28,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-22 15:50:28,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-22 15:50:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-22 15:50:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2018-10-22 15:50:28,875 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 117 [2018-10-22 15:50:28,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:28,875 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2018-10-22 15:50:28,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-22 15:50:28,876 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2018-10-22 15:50:28,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-22 15:50:28,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:28,876 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:28,876 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:28,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:28,877 INFO L82 PathProgramCache]: Analyzing trace with hash 661323713, now seen corresponding path program 36 times [2018-10-22 15:50:28,877 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:28,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:28,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:28,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:28,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 380 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:29,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:29,173 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:29,187 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:29,281 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-22 15:50:29,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:29,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 380 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:29,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:29,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-10-22 15:50:29,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:50:29,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:50:29,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:50:29,670 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 25 states. [2018-10-22 15:50:30,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:30,830 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-10-22 15:50:30,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-22 15:50:30,831 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 119 [2018-10-22 15:50:30,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:30,832 INFO L225 Difference]: With dead ends: 133 [2018-10-22 15:50:30,832 INFO L226 Difference]: Without dead ends: 131 [2018-10-22 15:50:30,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=763, Invalid=1307, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:50:30,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-22 15:50:30,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2018-10-22 15:50:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-22 15:50:30,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2018-10-22 15:50:30,851 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 119 [2018-10-22 15:50:30,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:30,851 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2018-10-22 15:50:30,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:50:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2018-10-22 15:50:30,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-22 15:50:30,852 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:30,852 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:30,852 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:30,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:30,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2136570890, now seen corresponding path program 37 times [2018-10-22 15:50:30,852 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:30,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:30,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:30,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:30,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 741 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:31,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:31,550 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:31,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:31,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 741 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:32,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:32,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 63 [2018-10-22 15:50:32,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-22 15:50:32,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-22 15:50:32,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2018-10-22 15:50:32,811 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 63 states. [2018-10-22 15:50:33,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:33,785 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2018-10-22 15:50:33,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-22 15:50:33,785 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 123 [2018-10-22 15:50:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:33,786 INFO L225 Difference]: With dead ends: 211 [2018-10-22 15:50:33,786 INFO L226 Difference]: Without dead ends: 126 [2018-10-22 15:50:33,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1637, Invalid=5335, Unknown=0, NotChecked=0, Total=6972 [2018-10-22 15:50:33,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-22 15:50:33,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-22 15:50:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-22 15:50:33,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2018-10-22 15:50:33,812 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 123 [2018-10-22 15:50:33,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:33,812 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2018-10-22 15:50:33,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-22 15:50:33,812 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2018-10-22 15:50:33,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-22 15:50:33,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:33,813 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:33,813 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:33,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:33,814 INFO L82 PathProgramCache]: Analyzing trace with hash -976315708, now seen corresponding path program 38 times [2018-10-22 15:50:33,814 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:33,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:33,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:33,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:33,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 420 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:34,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:34,214 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:34,222 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:34,274 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:34,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:34,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 420 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:34,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:34,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-10-22 15:50:34,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-22 15:50:34,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-22 15:50:34,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:50:34,355 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 26 states. [2018-10-22 15:50:34,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:34,779 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2018-10-22 15:50:34,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-22 15:50:34,779 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 125 [2018-10-22 15:50:34,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:34,780 INFO L225 Difference]: With dead ends: 139 [2018-10-22 15:50:34,780 INFO L226 Difference]: Without dead ends: 137 [2018-10-22 15:50:34,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=832, Invalid=1424, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:50:34,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-22 15:50:34,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2018-10-22 15:50:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-22 15:50:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2018-10-22 15:50:34,807 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 125 [2018-10-22 15:50:34,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:34,808 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2018-10-22 15:50:34,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-22 15:50:34,808 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2018-10-22 15:50:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-22 15:50:34,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:34,809 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:34,809 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:34,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:34,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1130242675, now seen corresponding path program 39 times [2018-10-22 15:50:34,810 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:34,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:34,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:34,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:34,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 820 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:36,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:36,260 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:36,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:36,438 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-22 15:50:36,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:36,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 820 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:37,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:37,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 66 [2018-10-22 15:50:37,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-22 15:50:37,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-22 15:50:37,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2018-10-22 15:50:37,552 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 66 states. [2018-10-22 15:50:38,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:38,723 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2018-10-22 15:50:38,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-22 15:50:38,723 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 129 [2018-10-22 15:50:38,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:38,724 INFO L225 Difference]: With dead ends: 221 [2018-10-22 15:50:38,724 INFO L226 Difference]: Without dead ends: 132 [2018-10-22 15:50:38,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1792, Invalid=5864, Unknown=0, NotChecked=0, Total=7656 [2018-10-22 15:50:38,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-22 15:50:38,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-10-22 15:50:38,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-22 15:50:38,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2018-10-22 15:50:38,751 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2018-10-22 15:50:38,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:38,752 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2018-10-22 15:50:38,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-22 15:50:38,752 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2018-10-22 15:50:38,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-22 15:50:38,753 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:38,753 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:38,753 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:38,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:38,753 INFO L82 PathProgramCache]: Analyzing trace with hash 26183879, now seen corresponding path program 40 times [2018-10-22 15:50:38,753 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:38,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:38,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:38,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:38,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 462 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:39,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:39,245 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:39,253 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:39,308 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:39,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:39,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 462 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:39,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:39,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-10-22 15:50:39,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 15:50:39,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 15:50:39,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:50:39,380 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 27 states. [2018-10-22 15:50:39,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:39,836 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-10-22 15:50:39,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-22 15:50:39,836 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 131 [2018-10-22 15:50:39,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:39,837 INFO L225 Difference]: With dead ends: 145 [2018-10-22 15:50:39,837 INFO L226 Difference]: Without dead ends: 143 [2018-10-22 15:50:39,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=904, Invalid=1546, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:50:39,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-22 15:50:39,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2018-10-22 15:50:39,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-22 15:50:39,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2018-10-22 15:50:39,860 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 131 [2018-10-22 15:50:39,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:39,860 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2018-10-22 15:50:39,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 15:50:39,861 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2018-10-22 15:50:39,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-22 15:50:39,861 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:39,861 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:39,862 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:39,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:39,862 INFO L82 PathProgramCache]: Analyzing trace with hash 845550096, now seen corresponding path program 41 times [2018-10-22 15:50:39,862 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:39,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:39,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:39,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:39,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 903 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:41,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:41,542 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:41,552 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:41,631 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-22 15:50:41,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:41,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 903 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:42,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:42,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 69 [2018-10-22 15:50:42,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-22 15:50:42,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-22 15:50:42,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1103, Invalid=3589, Unknown=0, NotChecked=0, Total=4692 [2018-10-22 15:50:42,757 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 69 states. [2018-10-22 15:50:44,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:44,036 INFO L93 Difference]: Finished difference Result 231 states and 233 transitions. [2018-10-22 15:50:44,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-22 15:50:44,036 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 135 [2018-10-22 15:50:44,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:44,037 INFO L225 Difference]: With dead ends: 231 [2018-10-22 15:50:44,037 INFO L226 Difference]: Without dead ends: 138 [2018-10-22 15:50:44,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1954, Invalid=6418, Unknown=0, NotChecked=0, Total=8372 [2018-10-22 15:50:44,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-22 15:50:44,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-22 15:50:44,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-22 15:50:44,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2018-10-22 15:50:44,063 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 135 [2018-10-22 15:50:44,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:44,063 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2018-10-22 15:50:44,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-22 15:50:44,063 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2018-10-22 15:50:44,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-22 15:50:44,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:44,064 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:44,064 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:44,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:44,065 INFO L82 PathProgramCache]: Analyzing trace with hash 391178698, now seen corresponding path program 42 times [2018-10-22 15:50:44,065 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:44,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:44,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:44,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:44,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 506 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:44,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:44,497 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:44,521 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:44,625 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-22 15:50:44,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:44,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 506 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:44,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:44,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-10-22 15:50:44,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:50:44,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:50:44,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:50:44,739 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 28 states. [2018-10-22 15:50:45,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:45,213 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2018-10-22 15:50:45,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-22 15:50:45,214 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 137 [2018-10-22 15:50:45,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:45,215 INFO L225 Difference]: With dead ends: 151 [2018-10-22 15:50:45,215 INFO L226 Difference]: Without dead ends: 149 [2018-10-22 15:50:45,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=979, Invalid=1673, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:50:45,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-22 15:50:45,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 142. [2018-10-22 15:50:45,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-22 15:50:45,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2018-10-22 15:50:45,239 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 137 [2018-10-22 15:50:45,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:45,239 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2018-10-22 15:50:45,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:50:45,239 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2018-10-22 15:50:45,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-22 15:50:45,240 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:45,240 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:45,240 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:45,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:45,240 INFO L82 PathProgramCache]: Analyzing trace with hash -692504173, now seen corresponding path program 43 times [2018-10-22 15:50:45,240 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:45,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:45,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:45,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:45,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 990 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:46,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:46,072 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:46,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:46,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 990 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:47,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:47,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 72 [2018-10-22 15:50:47,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-22 15:50:47,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-22 15:50:47,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2018-10-22 15:50:47,213 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 72 states. [2018-10-22 15:50:48,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:48,598 INFO L93 Difference]: Finished difference Result 241 states and 243 transitions. [2018-10-22 15:50:48,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-22 15:50:48,598 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 141 [2018-10-22 15:50:48,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:48,599 INFO L225 Difference]: With dead ends: 241 [2018-10-22 15:50:48,599 INFO L226 Difference]: Without dead ends: 144 [2018-10-22 15:50:48,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2123, Invalid=6997, Unknown=0, NotChecked=0, Total=9120 [2018-10-22 15:50:48,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-22 15:50:48,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-10-22 15:50:48,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-22 15:50:48,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2018-10-22 15:50:48,622 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 141 [2018-10-22 15:50:48,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:48,622 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2018-10-22 15:50:48,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-22 15:50:48,622 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2018-10-22 15:50:48,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-22 15:50:48,623 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:48,623 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:48,623 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:48,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:48,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1355948595, now seen corresponding path program 44 times [2018-10-22 15:50:48,624 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:48,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:48,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:48,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:48,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 552 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:49,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:49,141 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:49,149 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:49,211 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:49,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:49,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 552 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:49,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:49,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-10-22 15:50:49,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:50:49,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:50:49,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:50:49,565 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 29 states. [2018-10-22 15:50:50,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:50,098 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-10-22 15:50:50,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-22 15:50:50,099 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 143 [2018-10-22 15:50:50,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:50,100 INFO L225 Difference]: With dead ends: 157 [2018-10-22 15:50:50,100 INFO L226 Difference]: Without dead ends: 155 [2018-10-22 15:50:50,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1057, Invalid=1805, Unknown=0, NotChecked=0, Total=2862 [2018-10-22 15:50:50,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-22 15:50:50,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 148. [2018-10-22 15:50:50,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-22 15:50:50,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2018-10-22 15:50:50,124 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 143 [2018-10-22 15:50:50,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:50,124 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2018-10-22 15:50:50,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:50:50,124 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2018-10-22 15:50:50,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-22 15:50:50,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:50,125 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:50,125 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:50,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:50,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1893305322, now seen corresponding path program 45 times [2018-10-22 15:50:50,126 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:50,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:50,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:50,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:50,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 1081 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:51,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:51,876 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:51,885 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:51,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-22 15:50:51,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:51,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 1081 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:54,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:54,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 75 [2018-10-22 15:50:54,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-22 15:50:54,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-22 15:50:54,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=4251, Unknown=0, NotChecked=0, Total=5550 [2018-10-22 15:50:54,101 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 75 states. [2018-10-22 15:50:55,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:55,458 INFO L93 Difference]: Finished difference Result 251 states and 253 transitions. [2018-10-22 15:50:55,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-22 15:50:55,459 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 147 [2018-10-22 15:50:55,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:55,459 INFO L225 Difference]: With dead ends: 251 [2018-10-22 15:50:55,459 INFO L226 Difference]: Without dead ends: 150 [2018-10-22 15:50:55,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2299, Invalid=7601, Unknown=0, NotChecked=0, Total=9900 [2018-10-22 15:50:55,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-22 15:50:55,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-22 15:50:55,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-22 15:50:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2018-10-22 15:50:55,485 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 147 [2018-10-22 15:50:55,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:55,485 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2018-10-22 15:50:55,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-22 15:50:55,486 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2018-10-22 15:50:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-22 15:50:55,486 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:55,486 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:55,486 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:55,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:55,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1162246960, now seen corresponding path program 46 times [2018-10-22 15:50:55,487 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:55,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:55,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:55,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:55,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 600 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:55,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:55,977 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:55,985 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:56,049 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:56,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:56,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 600 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:56,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:56,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-10-22 15:50:56,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-22 15:50:56,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-22 15:50:56,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:50:56,134 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 30 states. [2018-10-22 15:50:56,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:56,674 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2018-10-22 15:50:56,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-22 15:50:56,674 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 149 [2018-10-22 15:50:56,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:56,675 INFO L225 Difference]: With dead ends: 163 [2018-10-22 15:50:56,675 INFO L226 Difference]: Without dead ends: 161 [2018-10-22 15:50:56,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1138, Invalid=1942, Unknown=0, NotChecked=0, Total=3080 [2018-10-22 15:50:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-22 15:50:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 154. [2018-10-22 15:50:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-22 15:50:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2018-10-22 15:50:56,708 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 149 [2018-10-22 15:50:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:56,708 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2018-10-22 15:50:56,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-22 15:50:56,708 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2018-10-22 15:50:56,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-22 15:50:56,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:56,709 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:56,710 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:56,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:56,710 INFO L82 PathProgramCache]: Analyzing trace with hash 246473113, now seen corresponding path program 47 times [2018-10-22 15:50:56,710 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:56,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:56,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:56,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:56,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 1176 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:58,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:58,256 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:58,264 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:58,350 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-22 15:50:58,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:58,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 1176 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:59,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:59,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 78 [2018-10-22 15:50:59,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-22 15:50:59,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-22 15:50:59,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2018-10-22 15:50:59,438 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 78 states. [2018-10-22 15:51:00,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:00,711 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2018-10-22 15:51:00,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-22 15:51:00,711 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 153 [2018-10-22 15:51:00,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:00,712 INFO L225 Difference]: With dead ends: 261 [2018-10-22 15:51:00,712 INFO L226 Difference]: Without dead ends: 156 [2018-10-22 15:51:00,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2125 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2482, Invalid=8230, Unknown=0, NotChecked=0, Total=10712 [2018-10-22 15:51:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-22 15:51:00,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-22 15:51:00,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-22 15:51:00,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2018-10-22 15:51:00,739 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 153 [2018-10-22 15:51:00,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:00,739 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2018-10-22 15:51:00,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-22 15:51:00,739 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2018-10-22 15:51:00,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-22 15:51:00,740 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:00,740 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:00,740 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:00,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:00,740 INFO L82 PathProgramCache]: Analyzing trace with hash -755040557, now seen corresponding path program 48 times [2018-10-22 15:51:00,741 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:00,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:00,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:00,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:00,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 650 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:01,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:01,287 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:01,294 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:01,382 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-22 15:51:01,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:01,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 650 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:01,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:01,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-10-22 15:51:01,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:51:01,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:51:01,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:51:01,677 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand 31 states. [2018-10-22 15:51:02,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:02,256 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-10-22 15:51:02,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-22 15:51:02,256 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 155 [2018-10-22 15:51:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:02,257 INFO L225 Difference]: With dead ends: 169 [2018-10-22 15:51:02,257 INFO L226 Difference]: Without dead ends: 167 [2018-10-22 15:51:02,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1222, Invalid=2084, Unknown=0, NotChecked=0, Total=3306 [2018-10-22 15:51:02,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-22 15:51:02,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2018-10-22 15:51:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-22 15:51:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2018-10-22 15:51:02,287 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 155 [2018-10-22 15:51:02,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:02,287 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2018-10-22 15:51:02,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:51:02,287 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2018-10-22 15:51:02,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-22 15:51:02,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:02,288 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:02,289 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:02,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:02,289 INFO L82 PathProgramCache]: Analyzing trace with hash 869507612, now seen corresponding path program 49 times [2018-10-22 15:51:02,289 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:02,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:02,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:02,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:02,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 1275 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:03,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:03,782 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:03,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:03,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 1275 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:04,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:04,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 81 [2018-10-22 15:51:04,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-22 15:51:04,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-22 15:51:04,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1511, Invalid=4969, Unknown=0, NotChecked=0, Total=6480 [2018-10-22 15:51:04,986 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 81 states. [2018-10-22 15:51:06,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:06,590 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2018-10-22 15:51:06,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-22 15:51:06,590 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 159 [2018-10-22 15:51:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:06,591 INFO L225 Difference]: With dead ends: 271 [2018-10-22 15:51:06,591 INFO L226 Difference]: Without dead ends: 162 [2018-10-22 15:51:06,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2672, Invalid=8884, Unknown=0, NotChecked=0, Total=11556 [2018-10-22 15:51:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-22 15:51:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-22 15:51:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-22 15:51:06,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2018-10-22 15:51:06,620 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 159 [2018-10-22 15:51:06,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:06,620 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2018-10-22 15:51:06,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-22 15:51:06,620 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2018-10-22 15:51:06,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-22 15:51:06,621 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:06,621 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:06,621 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:06,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:06,621 INFO L82 PathProgramCache]: Analyzing trace with hash 377580502, now seen corresponding path program 50 times [2018-10-22 15:51:06,621 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:06,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:06,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:06,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:06,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 702 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:07,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:07,180 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:07,189 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:07,262 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:07,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:07,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 702 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:07,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:07,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-10-22 15:51:07,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-22 15:51:07,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-22 15:51:07,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:51:07,720 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 32 states. [2018-10-22 15:51:08,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:08,419 INFO L93 Difference]: Finished difference Result 175 states and 176 transitions. [2018-10-22 15:51:08,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-22 15:51:08,419 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 161 [2018-10-22 15:51:08,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:08,420 INFO L225 Difference]: With dead ends: 175 [2018-10-22 15:51:08,421 INFO L226 Difference]: Without dead ends: 173 [2018-10-22 15:51:08,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1309, Invalid=2231, Unknown=0, NotChecked=0, Total=3540 [2018-10-22 15:51:08,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-22 15:51:08,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 166. [2018-10-22 15:51:08,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-22 15:51:08,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2018-10-22 15:51:08,468 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 161 [2018-10-22 15:51:08,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:08,469 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2018-10-22 15:51:08,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-22 15:51:08,469 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2018-10-22 15:51:08,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-22 15:51:08,469 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:08,470 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:08,470 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:08,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:08,470 INFO L82 PathProgramCache]: Analyzing trace with hash -427698785, now seen corresponding path program 51 times [2018-10-22 15:51:08,470 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:08,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:08,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:08,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:08,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1378 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:09,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:09,525 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:09,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:09,628 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-22 15:51:09,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:09,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1378 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:11,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:11,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 84 [2018-10-22 15:51:11,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-22 15:51:11,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-22 15:51:11,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2018-10-22 15:51:11,168 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 84 states. [2018-10-22 15:51:13,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:13,043 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2018-10-22 15:51:13,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-22 15:51:13,044 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 165 [2018-10-22 15:51:13,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:13,044 INFO L225 Difference]: With dead ends: 281 [2018-10-22 15:51:13,045 INFO L226 Difference]: Without dead ends: 168 [2018-10-22 15:51:13,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2869, Invalid=9563, Unknown=0, NotChecked=0, Total=12432 [2018-10-22 15:51:13,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-22 15:51:13,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-10-22 15:51:13,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-22 15:51:13,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2018-10-22 15:51:13,073 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 165 [2018-10-22 15:51:13,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:13,073 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2018-10-22 15:51:13,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-22 15:51:13,073 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2018-10-22 15:51:13,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-22 15:51:13,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:13,074 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:13,074 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:13,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:13,074 INFO L82 PathProgramCache]: Analyzing trace with hash -2026116135, now seen corresponding path program 52 times [2018-10-22 15:51:13,074 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:13,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:13,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:13,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:13,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 756 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:13,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:13,754 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:13,763 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:13,830 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:13,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:13,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 756 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:14,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:14,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-10-22 15:51:14,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:51:14,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:51:14,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:51:14,008 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand 33 states. [2018-10-22 15:51:14,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:14,616 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-10-22 15:51:14,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-22 15:51:14,616 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 167 [2018-10-22 15:51:14,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:14,617 INFO L225 Difference]: With dead ends: 181 [2018-10-22 15:51:14,617 INFO L226 Difference]: Without dead ends: 179 [2018-10-22 15:51:14,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1399, Invalid=2383, Unknown=0, NotChecked=0, Total=3782 [2018-10-22 15:51:14,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-22 15:51:14,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 172. [2018-10-22 15:51:14,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-22 15:51:14,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2018-10-22 15:51:14,653 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 167 [2018-10-22 15:51:14,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:14,654 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2018-10-22 15:51:14,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 15:51:14,654 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2018-10-22 15:51:14,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-22 15:51:14,655 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:14,655 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:14,655 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:14,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:14,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1982241826, now seen corresponding path program 53 times [2018-10-22 15:51:14,656 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:14,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:14,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:14,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:14,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 1485 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:15,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:15,790 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:15,798 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:15,899 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-22 15:51:15,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:15,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 1485 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:17,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:17,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 87 [2018-10-22 15:51:17,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-22 15:51:17,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-22 15:51:17,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1739, Invalid=5743, Unknown=0, NotChecked=0, Total=7482 [2018-10-22 15:51:17,300 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand 87 states. [2018-10-22 15:51:19,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:19,413 INFO L93 Difference]: Finished difference Result 291 states and 293 transitions. [2018-10-22 15:51:19,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-22 15:51:19,413 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 171 [2018-10-22 15:51:19,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:19,414 INFO L225 Difference]: With dead ends: 291 [2018-10-22 15:51:19,414 INFO L226 Difference]: Without dead ends: 174 [2018-10-22 15:51:19,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2674 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3073, Invalid=10267, Unknown=0, NotChecked=0, Total=13340 [2018-10-22 15:51:19,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-22 15:51:19,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-10-22 15:51:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-10-22 15:51:19,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2018-10-22 15:51:19,459 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 171 [2018-10-22 15:51:19,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:19,459 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2018-10-22 15:51:19,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-22 15:51:19,459 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2018-10-22 15:51:19,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-22 15:51:19,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:19,460 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:19,460 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:19,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:19,460 INFO L82 PathProgramCache]: Analyzing trace with hash -392061220, now seen corresponding path program 54 times [2018-10-22 15:51:19,460 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:19,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:19,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:19,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:19,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 812 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:19,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:19,974 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:19,983 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:20,085 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-22 15:51:20,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:20,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 812 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:20,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:20,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-10-22 15:51:20,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-22 15:51:20,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-22 15:51:20,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:51:20,173 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 34 states. [2018-10-22 15:51:20,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:20,827 INFO L93 Difference]: Finished difference Result 187 states and 188 transitions. [2018-10-22 15:51:20,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-22 15:51:20,827 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 173 [2018-10-22 15:51:20,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:20,828 INFO L225 Difference]: With dead ends: 187 [2018-10-22 15:51:20,828 INFO L226 Difference]: Without dead ends: 185 [2018-10-22 15:51:20,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1492, Invalid=2540, Unknown=0, NotChecked=0, Total=4032 [2018-10-22 15:51:20,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-22 15:51:20,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 178. [2018-10-22 15:51:20,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-22 15:51:20,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2018-10-22 15:51:20,878 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 173 [2018-10-22 15:51:20,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:20,878 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2018-10-22 15:51:20,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-22 15:51:20,878 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2018-10-22 15:51:20,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-22 15:51:20,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:20,880 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:20,880 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:20,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:20,880 INFO L82 PathProgramCache]: Analyzing trace with hash 2007307685, now seen corresponding path program 55 times [2018-10-22 15:51:20,880 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:20,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:20,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:20,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:20,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 1596 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:22,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:22,250 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:22,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:22,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 1596 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:24,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:24,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 90 [2018-10-22 15:51:24,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-22 15:51:24,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-22 15:51:24,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1859, Invalid=6151, Unknown=0, NotChecked=0, Total=8010 [2018-10-22 15:51:24,065 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand 90 states. [2018-10-22 15:51:25,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:25,512 INFO L93 Difference]: Finished difference Result 301 states and 303 transitions. [2018-10-22 15:51:25,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-22 15:51:25,512 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 177 [2018-10-22 15:51:25,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:25,513 INFO L225 Difference]: With dead ends: 301 [2018-10-22 15:51:25,513 INFO L226 Difference]: Without dead ends: 180 [2018-10-22 15:51:25,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2871 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3284, Invalid=10996, Unknown=0, NotChecked=0, Total=14280 [2018-10-22 15:51:25,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-22 15:51:25,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2018-10-22 15:51:25,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-10-22 15:51:25,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2018-10-22 15:51:25,549 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 177 [2018-10-22 15:51:25,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:25,549 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2018-10-22 15:51:25,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-22 15:51:25,549 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2018-10-22 15:51:25,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-22 15:51:25,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:25,550 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:25,550 INFO L424 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:25,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:25,551 INFO L82 PathProgramCache]: Analyzing trace with hash 496870623, now seen corresponding path program 56 times [2018-10-22 15:51:25,551 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:25,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:25,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:25,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:25,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 870 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:26,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:26,068 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:26,077 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:26,149 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:26,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:26,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 870 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:26,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:26,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-10-22 15:51:26,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:51:26,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:51:26,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:51:26,270 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 35 states. [2018-10-22 15:51:27,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:27,000 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2018-10-22 15:51:27,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-22 15:51:27,000 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 179 [2018-10-22 15:51:27,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:27,002 INFO L225 Difference]: With dead ends: 193 [2018-10-22 15:51:27,002 INFO L226 Difference]: Without dead ends: 191 [2018-10-22 15:51:27,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1588, Invalid=2702, Unknown=0, NotChecked=0, Total=4290 [2018-10-22 15:51:27,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-22 15:51:27,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2018-10-22 15:51:27,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-22 15:51:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2018-10-22 15:51:27,042 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 179 [2018-10-22 15:51:27,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:27,042 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2018-10-22 15:51:27,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:51:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2018-10-22 15:51:27,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-22 15:51:27,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:27,043 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:27,044 INFO L424 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:27,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:27,044 INFO L82 PathProgramCache]: Analyzing trace with hash 592994856, now seen corresponding path program 57 times [2018-10-22 15:51:27,044 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:27,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:27,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:27,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:27,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 1711 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:28,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:28,660 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:28,667 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:28,772 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-22 15:51:28,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:28,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 1711 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:30,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:30,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 93 [2018-10-22 15:51:30,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-22 15:51:30,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-22 15:51:30,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1983, Invalid=6573, Unknown=0, NotChecked=0, Total=8556 [2018-10-22 15:51:30,272 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 93 states. [2018-10-22 15:51:32,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:32,420 INFO L93 Difference]: Finished difference Result 311 states and 313 transitions. [2018-10-22 15:51:32,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-22 15:51:32,420 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 183 [2018-10-22 15:51:32,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:32,422 INFO L225 Difference]: With dead ends: 311 [2018-10-22 15:51:32,422 INFO L226 Difference]: Without dead ends: 186 [2018-10-22 15:51:32,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3075 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3502, Invalid=11750, Unknown=0, NotChecked=0, Total=15252 [2018-10-22 15:51:32,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-22 15:51:32,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-10-22 15:51:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-10-22 15:51:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2018-10-22 15:51:32,467 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 183 [2018-10-22 15:51:32,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:32,467 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2018-10-22 15:51:32,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-22 15:51:32,467 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2018-10-22 15:51:32,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-10-22 15:51:32,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:32,468 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:32,468 INFO L424 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:32,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:32,469 INFO L82 PathProgramCache]: Analyzing trace with hash 110304738, now seen corresponding path program 58 times [2018-10-22 15:51:32,469 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:32,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:32,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:32,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:32,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 930 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:33,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:33,650 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:33,661 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:33,742 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:33,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:33,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 930 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:33,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:33,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-10-22 15:51:33,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-22 15:51:33,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-22 15:51:33,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:51:33,899 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 36 states. [2018-10-22 15:51:34,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:34,599 INFO L93 Difference]: Finished difference Result 199 states and 200 transitions. [2018-10-22 15:51:34,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-22 15:51:34,599 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 185 [2018-10-22 15:51:34,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:34,600 INFO L225 Difference]: With dead ends: 199 [2018-10-22 15:51:34,600 INFO L226 Difference]: Without dead ends: 197 [2018-10-22 15:51:34,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1687, Invalid=2869, Unknown=0, NotChecked=0, Total=4556 [2018-10-22 15:51:34,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-22 15:51:34,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2018-10-22 15:51:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-10-22 15:51:34,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2018-10-22 15:51:34,641 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 185 [2018-10-22 15:51:34,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:34,641 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2018-10-22 15:51:34,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-22 15:51:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2018-10-22 15:51:34,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-10-22 15:51:34,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:34,642 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:34,642 INFO L424 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:34,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:34,642 INFO L82 PathProgramCache]: Analyzing trace with hash 856924587, now seen corresponding path program 59 times [2018-10-22 15:51:34,642 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:34,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:34,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:34,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:34,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 1830 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:35,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:35,955 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:35,963 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:36,080 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-22 15:51:36,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:36,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 1830 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:37,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:37,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 96 [2018-10-22 15:51:37,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-22 15:51:37,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-22 15:51:37,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2111, Invalid=7009, Unknown=0, NotChecked=0, Total=9120 [2018-10-22 15:51:37,775 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 96 states. [2018-10-22 15:51:39,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:39,672 INFO L93 Difference]: Finished difference Result 321 states and 323 transitions. [2018-10-22 15:51:39,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-22 15:51:39,672 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 189 [2018-10-22 15:51:39,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:39,673 INFO L225 Difference]: With dead ends: 321 [2018-10-22 15:51:39,673 INFO L226 Difference]: Without dead ends: 192 [2018-10-22 15:51:39,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3286 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3727, Invalid=12529, Unknown=0, NotChecked=0, Total=16256 [2018-10-22 15:51:39,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-10-22 15:51:39,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-10-22 15:51:39,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-22 15:51:39,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2018-10-22 15:51:39,713 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2018-10-22 15:51:39,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:39,713 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2018-10-22 15:51:39,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-22 15:51:39,713 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2018-10-22 15:51:39,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-22 15:51:39,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:39,714 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:39,714 INFO L424 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:39,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:39,714 INFO L82 PathProgramCache]: Analyzing trace with hash -547542555, now seen corresponding path program 60 times [2018-10-22 15:51:39,715 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:39,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:39,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:39,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:39,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 992 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:40,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:40,439 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:40,448 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:40,559 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-22 15:51:40,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:40,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 992 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:40,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:40,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-10-22 15:51:40,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:51:40,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:51:40,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:51:40,653 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand 37 states. [2018-10-22 15:51:41,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:41,382 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2018-10-22 15:51:41,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-22 15:51:41,383 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 191 [2018-10-22 15:51:41,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:41,384 INFO L225 Difference]: With dead ends: 205 [2018-10-22 15:51:41,384 INFO L226 Difference]: Without dead ends: 203 [2018-10-22 15:51:41,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1789, Invalid=3041, Unknown=0, NotChecked=0, Total=4830 [2018-10-22 15:51:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-22 15:51:41,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 196. [2018-10-22 15:51:41,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-22 15:51:41,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2018-10-22 15:51:41,437 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 191 [2018-10-22 15:51:41,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:41,437 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2018-10-22 15:51:41,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:51:41,437 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2018-10-22 15:51:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-22 15:51:41,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:41,438 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:41,438 INFO L424 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:41,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:41,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1075967022, now seen corresponding path program 61 times [2018-10-22 15:51:41,439 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:41,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:41,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:41,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:41,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:42,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2945 backedges. 1953 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:42,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:42,918 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:42,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:43,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2945 backedges. 1953 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:44,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:44,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 99 [2018-10-22 15:51:44,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-22 15:51:44,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-22 15:51:44,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2243, Invalid=7459, Unknown=0, NotChecked=0, Total=9702 [2018-10-22 15:51:44,930 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand 99 states. [2018-10-22 15:51:47,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:47,219 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2018-10-22 15:51:47,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-22 15:51:47,220 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 195 [2018-10-22 15:51:47,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:47,221 INFO L225 Difference]: With dead ends: 331 [2018-10-22 15:51:47,221 INFO L226 Difference]: Without dead ends: 198 [2018-10-22 15:51:47,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3504 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3959, Invalid=13333, Unknown=0, NotChecked=0, Total=17292 [2018-10-22 15:51:47,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-10-22 15:51:47,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-10-22 15:51:47,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-10-22 15:51:47,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2018-10-22 15:51:47,269 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 195 [2018-10-22 15:51:47,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:47,269 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2018-10-22 15:51:47,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-22 15:51:47,269 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2018-10-22 15:51:47,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-22 15:51:47,270 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:47,271 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:47,271 INFO L424 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:47,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:47,271 INFO L82 PathProgramCache]: Analyzing trace with hash 491710696, now seen corresponding path program 62 times [2018-10-22 15:51:47,271 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:47,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:47,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:47,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:47,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3009 backedges. 1056 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:47,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:47,868 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:47,877 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:47,968 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:47,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:47,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3009 backedges. 1056 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:48,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:48,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-10-22 15:51:48,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-22 15:51:48,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-22 15:51:48,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:51:48,064 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 38 states. [2018-10-22 15:51:49,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:49,062 INFO L93 Difference]: Finished difference Result 211 states and 212 transitions. [2018-10-22 15:51:49,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-22 15:51:49,063 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 197 [2018-10-22 15:51:49,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:49,064 INFO L225 Difference]: With dead ends: 211 [2018-10-22 15:51:49,064 INFO L226 Difference]: Without dead ends: 209 [2018-10-22 15:51:49,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1894, Invalid=3218, Unknown=0, NotChecked=0, Total=5112 [2018-10-22 15:51:49,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-22 15:51:49,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 202. [2018-10-22 15:51:49,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-10-22 15:51:49,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2018-10-22 15:51:49,106 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 197 [2018-10-22 15:51:49,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:49,106 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2018-10-22 15:51:49,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-22 15:51:49,106 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2018-10-22 15:51:49,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-10-22 15:51:49,107 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:49,107 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:49,107 INFO L424 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:49,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:49,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1589216847, now seen corresponding path program 63 times [2018-10-22 15:51:49,108 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:49,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:49,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:49,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:49,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 2080 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:50,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:50,671 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:50,679 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:50,801 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-22 15:51:50,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:50,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 2080 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:52,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:52,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 102 [2018-10-22 15:51:52,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-22 15:51:52,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-22 15:51:52,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2379, Invalid=7923, Unknown=0, NotChecked=0, Total=10302 [2018-10-22 15:51:52,626 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 102 states. [2018-10-22 15:51:55,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:55,289 INFO L93 Difference]: Finished difference Result 341 states and 343 transitions. [2018-10-22 15:51:55,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-22 15:51:55,289 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 201 [2018-10-22 15:51:55,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:55,290 INFO L225 Difference]: With dead ends: 341 [2018-10-22 15:51:55,290 INFO L226 Difference]: Without dead ends: 204 [2018-10-22 15:51:55,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3729 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4198, Invalid=14162, Unknown=0, NotChecked=0, Total=18360 [2018-10-22 15:51:55,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-22 15:51:55,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2018-10-22 15:51:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-10-22 15:51:55,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2018-10-22 15:51:55,335 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 201 [2018-10-22 15:51:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:55,335 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2018-10-22 15:51:55,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-22 15:51:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2018-10-22 15:51:55,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-22 15:51:55,336 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:55,336 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:55,336 INFO L424 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:55,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:55,337 INFO L82 PathProgramCache]: Analyzing trace with hash -852264213, now seen corresponding path program 64 times [2018-10-22 15:51:55,337 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:55,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:55,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:55,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:55,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 1122 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:55,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:55,959 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:55,967 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:56,058 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:56,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:56,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 1122 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:56,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:56,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-10-22 15:51:56,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-22 15:51:56,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-22 15:51:56,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:51:56,393 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 39 states. [2018-10-22 15:51:57,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:57,203 INFO L93 Difference]: Finished difference Result 217 states and 218 transitions. [2018-10-22 15:51:57,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-22 15:51:57,203 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 203 [2018-10-22 15:51:57,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:57,204 INFO L225 Difference]: With dead ends: 217 [2018-10-22 15:51:57,204 INFO L226 Difference]: Without dead ends: 215 [2018-10-22 15:51:57,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2002, Invalid=3400, Unknown=0, NotChecked=0, Total=5402 [2018-10-22 15:51:57,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-10-22 15:51:57,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 208. [2018-10-22 15:51:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-22 15:51:57,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2018-10-22 15:51:57,252 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 203 [2018-10-22 15:51:57,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:57,252 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2018-10-22 15:51:57,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-22 15:51:57,252 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2018-10-22 15:51:57,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-22 15:51:57,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:57,253 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:57,253 INFO L424 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:57,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:57,254 INFO L82 PathProgramCache]: Analyzing trace with hash -927182284, now seen corresponding path program 65 times [2018-10-22 15:51:57,254 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:57,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:57,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:57,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:57,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3333 backedges. 2211 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:59,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:59,269 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:59,278 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:59,406 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-22 15:51:59,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:59,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3333 backedges. 2211 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:01,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:01,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 105 [2018-10-22 15:52:01,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-22 15:52:01,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-22 15:52:01,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2519, Invalid=8401, Unknown=0, NotChecked=0, Total=10920 [2018-10-22 15:52:01,308 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand 105 states. [2018-10-22 15:52:04,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:04,112 INFO L93 Difference]: Finished difference Result 351 states and 353 transitions. [2018-10-22 15:52:04,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-22 15:52:04,112 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 207 [2018-10-22 15:52:04,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:04,113 INFO L225 Difference]: With dead ends: 351 [2018-10-22 15:52:04,113 INFO L226 Difference]: Without dead ends: 210 [2018-10-22 15:52:04,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3961 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4444, Invalid=15016, Unknown=0, NotChecked=0, Total=19460 [2018-10-22 15:52:04,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-10-22 15:52:04,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-10-22 15:52:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-10-22 15:52:04,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2018-10-22 15:52:04,162 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 207 [2018-10-22 15:52:04,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:04,162 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2018-10-22 15:52:04,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-22 15:52:04,163 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2018-10-22 15:52:04,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-22 15:52:04,163 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:04,163 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:04,164 INFO L424 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:04,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:04,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1900937198, now seen corresponding path program 66 times [2018-10-22 15:52:04,164 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:04,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:04,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:04,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:04,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 1190 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:04,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:04,851 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:04,859 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:52:04,994 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-10-22 15:52:04,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:04,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 1190 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:05,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:05,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-10-22 15:52:05,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:52:05,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:52:05,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:52:05,113 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand 40 states. [2018-10-22 15:52:05,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:05,973 INFO L93 Difference]: Finished difference Result 223 states and 224 transitions. [2018-10-22 15:52:05,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-22 15:52:05,973 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 209 [2018-10-22 15:52:05,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:05,974 INFO L225 Difference]: With dead ends: 223 [2018-10-22 15:52:05,975 INFO L226 Difference]: Without dead ends: 221 [2018-10-22 15:52:05,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2113, Invalid=3587, Unknown=0, NotChecked=0, Total=5700 [2018-10-22 15:52:05,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-22 15:52:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 214. [2018-10-22 15:52:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-10-22 15:52:06,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2018-10-22 15:52:06,028 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 209 [2018-10-22 15:52:06,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:06,028 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2018-10-22 15:52:06,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:52:06,028 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2018-10-22 15:52:06,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-22 15:52:06,029 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:06,030 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:06,030 INFO L424 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:06,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:06,030 INFO L82 PathProgramCache]: Analyzing trace with hash 574004663, now seen corresponding path program 67 times [2018-10-22 15:52:06,030 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:06,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:06,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:06,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:06,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 2346 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:07,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:07,728 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:07,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:07,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 2346 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:10,137 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:10,137 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 108 [2018-10-22 15:52:10,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-22 15:52:10,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-22 15:52:10,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2663, Invalid=8893, Unknown=0, NotChecked=0, Total=11556 [2018-10-22 15:52:10,138 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 108 states. [2018-10-22 15:52:12,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:12,994 INFO L93 Difference]: Finished difference Result 361 states and 363 transitions. [2018-10-22 15:52:12,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-22 15:52:12,994 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 213 [2018-10-22 15:52:12,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:12,995 INFO L225 Difference]: With dead ends: 361 [2018-10-22 15:52:12,995 INFO L226 Difference]: Without dead ends: 216 [2018-10-22 15:52:12,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4200 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4697, Invalid=15895, Unknown=0, NotChecked=0, Total=20592 [2018-10-22 15:52:12,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-10-22 15:52:13,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-10-22 15:52:13,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-10-22 15:52:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2018-10-22 15:52:13,045 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 213 [2018-10-22 15:52:13,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:13,045 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2018-10-22 15:52:13,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-22 15:52:13,045 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2018-10-22 15:52:13,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-10-22 15:52:13,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:13,046 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:13,047 INFO L424 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:13,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:13,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1599707121, now seen corresponding path program 68 times [2018-10-22 15:52:13,047 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:13,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:13,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:13,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:13,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:13,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3606 backedges. 1260 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:13,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:13,768 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:13,774 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:52:13,863 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:52:13,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:13,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3606 backedges. 1260 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:13,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:13,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-10-22 15:52:13,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:52:13,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:52:13,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:52:13,971 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand 41 states. [2018-10-22 15:52:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:15,112 INFO L93 Difference]: Finished difference Result 229 states and 230 transitions. [2018-10-22 15:52:15,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-22 15:52:15,113 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 215 [2018-10-22 15:52:15,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:15,113 INFO L225 Difference]: With dead ends: 229 [2018-10-22 15:52:15,114 INFO L226 Difference]: Without dead ends: 227 [2018-10-22 15:52:15,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2227, Invalid=3779, Unknown=0, NotChecked=0, Total=6006 [2018-10-22 15:52:15,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-22 15:52:15,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2018-10-22 15:52:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-22 15:52:15,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2018-10-22 15:52:15,166 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 215 [2018-10-22 15:52:15,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:15,167 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2018-10-22 15:52:15,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 15:52:15,167 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2018-10-22 15:52:15,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-22 15:52:15,168 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:15,168 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:15,168 INFO L424 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:15,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:15,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1893760058, now seen corresponding path program 69 times [2018-10-22 15:52:15,169 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:15,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:15,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:15,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:15,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3745 backedges. 2485 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:16,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:16,913 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:16,921 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:52:17,065 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-22 15:52:17,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:17,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3745 backedges. 2485 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:19,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:19,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 111 [2018-10-22 15:52:19,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-10-22 15:52:19,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-10-22 15:52:19,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2811, Invalid=9399, Unknown=0, NotChecked=0, Total=12210 [2018-10-22 15:52:19,173 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand 111 states. [2018-10-22 15:52:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:22,374 INFO L93 Difference]: Finished difference Result 371 states and 373 transitions. [2018-10-22 15:52:22,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-22 15:52:22,374 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 219 [2018-10-22 15:52:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:22,375 INFO L225 Difference]: With dead ends: 371 [2018-10-22 15:52:22,375 INFO L226 Difference]: Without dead ends: 222 [2018-10-22 15:52:22,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4446 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4957, Invalid=16799, Unknown=0, NotChecked=0, Total=21756 [2018-10-22 15:52:22,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-22 15:52:22,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2018-10-22 15:52:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-10-22 15:52:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2018-10-22 15:52:22,424 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 219 [2018-10-22 15:52:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:22,425 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2018-10-22 15:52:22,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-10-22 15:52:22,425 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2018-10-22 15:52:22,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-22 15:52:22,425 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:22,426 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:22,426 INFO L424 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:22,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:22,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1635163404, now seen corresponding path program 70 times [2018-10-22 15:52:22,426 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:22,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:22,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:22,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:22,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:23,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3817 backedges. 1332 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:23,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:23,158 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:23,164 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:52:23,265 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:52:23,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:23,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3817 backedges. 1332 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:23,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:23,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-10-22 15:52:23,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-22 15:52:23,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-22 15:52:23,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:52:23,388 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 42 states. [2018-10-22 15:52:24,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:24,340 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2018-10-22 15:52:24,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-22 15:52:24,340 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 221 [2018-10-22 15:52:24,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:24,342 INFO L225 Difference]: With dead ends: 235 [2018-10-22 15:52:24,342 INFO L226 Difference]: Without dead ends: 233 [2018-10-22 15:52:24,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2344, Invalid=3976, Unknown=0, NotChecked=0, Total=6320 [2018-10-22 15:52:24,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-10-22 15:52:24,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2018-10-22 15:52:24,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-10-22 15:52:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2018-10-22 15:52:24,400 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 221 [2018-10-22 15:52:24,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:24,400 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2018-10-22 15:52:24,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-22 15:52:24,400 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2018-10-22 15:52:24,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-10-22 15:52:24,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:24,401 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:24,402 INFO L424 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:24,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:24,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1386410563, now seen corresponding path program 71 times [2018-10-22 15:52:24,402 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:24,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:24,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:24,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:24,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2628 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:26,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:26,915 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:26,922 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:52:27,067 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-22 15:52:27,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:27,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2628 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:29,293 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:29,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 114 [2018-10-22 15:52:29,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-22 15:52:29,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-22 15:52:29,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2963, Invalid=9919, Unknown=0, NotChecked=0, Total=12882 [2018-10-22 15:52:29,295 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand 114 states. [2018-10-22 15:52:32,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:32,599 INFO L93 Difference]: Finished difference Result 381 states and 383 transitions. [2018-10-22 15:52:32,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-22 15:52:32,600 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 225 [2018-10-22 15:52:32,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:32,601 INFO L225 Difference]: With dead ends: 381 [2018-10-22 15:52:32,601 INFO L226 Difference]: Without dead ends: 228 [2018-10-22 15:52:32,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4699 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5224, Invalid=17728, Unknown=0, NotChecked=0, Total=22952 [2018-10-22 15:52:32,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-22 15:52:32,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-10-22 15:52:32,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-10-22 15:52:32,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 229 transitions. [2018-10-22 15:52:32,667 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 229 transitions. Word has length 225 [2018-10-22 15:52:32,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:32,668 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 229 transitions. [2018-10-22 15:52:32,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-22 15:52:32,668 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 229 transitions. [2018-10-22 15:52:32,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-10-22 15:52:32,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:32,669 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:32,669 INFO L424 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:32,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:32,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1166573815, now seen corresponding path program 72 times [2018-10-22 15:52:32,670 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:32,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:32,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:32,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:32,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4034 backedges. 1406 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:33,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:33,414 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:33,421 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:52:33,560 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-22 15:52:33,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:33,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4034 backedges. 1406 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:33,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:33,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-10-22 15:52:33,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-22 15:52:33,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-22 15:52:33,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:52:33,679 INFO L87 Difference]: Start difference. First operand 228 states and 229 transitions. Second operand 43 states. [2018-10-22 15:52:34,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:34,641 INFO L93 Difference]: Finished difference Result 241 states and 242 transitions. [2018-10-22 15:52:34,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-22 15:52:34,641 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 227 [2018-10-22 15:52:34,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:34,642 INFO L225 Difference]: With dead ends: 241 [2018-10-22 15:52:34,642 INFO L226 Difference]: Without dead ends: 239 [2018-10-22 15:52:34,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2464, Invalid=4178, Unknown=0, NotChecked=0, Total=6642 [2018-10-22 15:52:34,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-22 15:52:34,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 232. [2018-10-22 15:52:34,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-22 15:52:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2018-10-22 15:52:34,715 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 227 [2018-10-22 15:52:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:34,715 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2018-10-22 15:52:34,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-22 15:52:34,716 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2018-10-22 15:52:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-22 15:52:34,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:34,717 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:34,717 INFO L424 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:34,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:34,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1674015296, now seen corresponding path program 73 times [2018-10-22 15:52:34,717 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:34,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:34,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:34,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:34,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4181 backedges. 2775 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:36,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:36,710 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:36,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:36,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:36,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4181 backedges. 2775 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:39,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:39,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 117 [2018-10-22 15:52:39,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-10-22 15:52:39,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-10-22 15:52:39,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3119, Invalid=10453, Unknown=0, NotChecked=0, Total=13572 [2018-10-22 15:52:39,156 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand 117 states. [2018-10-22 15:52:42,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:42,702 INFO L93 Difference]: Finished difference Result 391 states and 393 transitions. [2018-10-22 15:52:42,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-22 15:52:42,703 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 231 [2018-10-22 15:52:42,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:42,703 INFO L225 Difference]: With dead ends: 391 [2018-10-22 15:52:42,704 INFO L226 Difference]: Without dead ends: 234 [2018-10-22 15:52:42,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4959 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5498, Invalid=18682, Unknown=0, NotChecked=0, Total=24180 [2018-10-22 15:52:42,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-22 15:52:42,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2018-10-22 15:52:42,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-10-22 15:52:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2018-10-22 15:52:42,770 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 231 [2018-10-22 15:52:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:42,770 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2018-10-22 15:52:42,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-10-22 15:52:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2018-10-22 15:52:42,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-10-22 15:52:42,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:42,771 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:42,771 INFO L424 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:42,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:42,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1484395002, now seen corresponding path program 74 times [2018-10-22 15:52:42,771 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:42,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:42,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:42,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:42,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:42,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4257 backedges. 1482 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:43,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:43,548 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:43,554 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:52:43,651 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:52:43,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:43,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4257 backedges. 1482 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:43,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:43,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-10-22 15:52:43,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-22 15:52:43,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-22 15:52:43,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:52:43,767 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 44 states. [2018-10-22 15:52:44,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:44,810 INFO L93 Difference]: Finished difference Result 247 states and 248 transitions. [2018-10-22 15:52:44,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-22 15:52:44,810 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 233 [2018-10-22 15:52:44,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:44,811 INFO L225 Difference]: With dead ends: 247 [2018-10-22 15:52:44,811 INFO L226 Difference]: Without dead ends: 245 [2018-10-22 15:52:44,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2587, Invalid=4385, Unknown=0, NotChecked=0, Total=6972 [2018-10-22 15:52:44,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-10-22 15:52:44,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 238. [2018-10-22 15:52:44,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-10-22 15:52:44,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 239 transitions. [2018-10-22 15:52:44,875 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 239 transitions. Word has length 233 [2018-10-22 15:52:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:44,875 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 239 transitions. [2018-10-22 15:52:44,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-22 15:52:44,875 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 239 transitions. [2018-10-22 15:52:44,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-10-22 15:52:44,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:44,876 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:44,876 INFO L424 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:44,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:44,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1850553917, now seen corresponding path program 75 times [2018-10-22 15:52:44,877 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:44,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:44,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:44,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:44,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 2926 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:47,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:47,111 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:47,119 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:52:47,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-22 15:52:47,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:47,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 2926 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:49,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:49,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 120 [2018-10-22 15:52:49,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-22 15:52:49,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-22 15:52:49,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3279, Invalid=11001, Unknown=0, NotChecked=0, Total=14280 [2018-10-22 15:52:49,705 INFO L87 Difference]: Start difference. First operand 238 states and 239 transitions. Second operand 120 states. [2018-10-22 15:52:51,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:51,857 INFO L93 Difference]: Finished difference Result 401 states and 403 transitions. [2018-10-22 15:52:51,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-22 15:52:51,857 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 237 [2018-10-22 15:52:51,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:51,858 INFO L225 Difference]: With dead ends: 401 [2018-10-22 15:52:51,858 INFO L226 Difference]: Without dead ends: 240 [2018-10-22 15:52:51,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5226 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5779, Invalid=19661, Unknown=0, NotChecked=0, Total=25440 [2018-10-22 15:52:51,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-10-22 15:52:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2018-10-22 15:52:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-10-22 15:52:51,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2018-10-22 15:52:51,923 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 237 [2018-10-22 15:52:51,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:51,923 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2018-10-22 15:52:51,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-22 15:52:51,923 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2018-10-22 15:52:51,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-10-22 15:52:51,924 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:51,924 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 38, 38, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:51,924 INFO L424 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:51,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:51,924 INFO L82 PathProgramCache]: Analyzing trace with hash 653866493, now seen corresponding path program 76 times [2018-10-22 15:52:51,924 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:51,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:51,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:51,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:51,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 1560 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:52,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:52,702 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:52,709 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:52:52,812 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:52:52,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:52,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 1560 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:52,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:52,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-10-22 15:52:52,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-22 15:52:52,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-22 15:52:52,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:52:52,927 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand 45 states. [2018-10-22 15:52:54,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:54,010 INFO L93 Difference]: Finished difference Result 253 states and 254 transitions. [2018-10-22 15:52:54,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-22 15:52:54,011 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 239 [2018-10-22 15:52:54,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:54,012 INFO L225 Difference]: With dead ends: 253 [2018-10-22 15:52:54,012 INFO L226 Difference]: Without dead ends: 251 [2018-10-22 15:52:54,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2713, Invalid=4597, Unknown=0, NotChecked=0, Total=7310 [2018-10-22 15:52:54,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-10-22 15:52:54,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 244. [2018-10-22 15:52:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-22 15:52:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2018-10-22 15:52:54,071 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 239 [2018-10-22 15:52:54,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:54,071 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2018-10-22 15:52:54,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-22 15:52:54,071 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2018-10-22 15:52:54,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-22 15:52:54,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:54,072 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:54,072 INFO L424 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:54,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:54,073 INFO L82 PathProgramCache]: Analyzing trace with hash 69874758, now seen corresponding path program 77 times [2018-10-22 15:52:54,073 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:54,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:54,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:54,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:54,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4641 backedges. 3081 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:56,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:56,467 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:56,474 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:52:56,628 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-22 15:52:56,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:56,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4641 backedges. 3081 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:59,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:59,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 123 [2018-10-22 15:52:59,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-10-22 15:52:59,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-10-22 15:52:59,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3443, Invalid=11563, Unknown=0, NotChecked=0, Total=15006 [2018-10-22 15:52:59,196 INFO L87 Difference]: Start difference. First operand 244 states and 245 transitions. Second operand 123 states. [2018-10-22 15:53:02,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:02,045 INFO L93 Difference]: Finished difference Result 411 states and 413 transitions. [2018-10-22 15:53:02,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-22 15:53:02,045 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 243 [2018-10-22 15:53:02,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:02,047 INFO L225 Difference]: With dead ends: 411 [2018-10-22 15:53:02,047 INFO L226 Difference]: Without dead ends: 246 [2018-10-22 15:53:02,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5500 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=6067, Invalid=20665, Unknown=0, NotChecked=0, Total=26732 [2018-10-22 15:53:02,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-22 15:53:02,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-10-22 15:53:02,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-10-22 15:53:02,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2018-10-22 15:53:02,111 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 243 [2018-10-22 15:53:02,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:02,112 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2018-10-22 15:53:02,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-10-22 15:53:02,112 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2018-10-22 15:53:02,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-10-22 15:53:02,112 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:02,113 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 39, 39, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:02,113 INFO L424 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:02,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:02,113 INFO L82 PathProgramCache]: Analyzing trace with hash 706284800, now seen corresponding path program 78 times [2018-10-22 15:53:02,113 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:02,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:02,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:02,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:02,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4721 backedges. 1640 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:02,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:02,966 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:02,973 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:53:03,135 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-10-22 15:53:03,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:03,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4721 backedges. 1640 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:03,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:03,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-10-22 15:53:03,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-22 15:53:03,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-22 15:53:03,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:53:03,309 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand 46 states. [2018-10-22 15:53:04,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:04,401 INFO L93 Difference]: Finished difference Result 259 states and 260 transitions. [2018-10-22 15:53:04,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-22 15:53:04,401 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 245 [2018-10-22 15:53:04,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:04,402 INFO L225 Difference]: With dead ends: 259 [2018-10-22 15:53:04,402 INFO L226 Difference]: Without dead ends: 257 [2018-10-22 15:53:04,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2842, Invalid=4814, Unknown=0, NotChecked=0, Total=7656 [2018-10-22 15:53:04,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-10-22 15:53:04,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2018-10-22 15:53:04,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-10-22 15:53:04,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2018-10-22 15:53:04,470 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 245 [2018-10-22 15:53:04,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:04,470 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2018-10-22 15:53:04,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-22 15:53:04,470 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2018-10-22 15:53:04,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-10-22 15:53:04,471 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:04,471 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:04,471 INFO L424 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:04,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:04,471 INFO L82 PathProgramCache]: Analyzing trace with hash 900780489, now seen corresponding path program 79 times [2018-10-22 15:53:04,472 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:04,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:04,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:04,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:04,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4880 backedges. 3240 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:06,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:06,871 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:06,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:53:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:06,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4880 backedges. 3240 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:09,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:09,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 126 [2018-10-22 15:53:09,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-22 15:53:09,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-22 15:53:09,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3611, Invalid=12139, Unknown=0, NotChecked=0, Total=15750 [2018-10-22 15:53:09,647 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand 126 states. [2018-10-22 15:53:12,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:12,696 INFO L93 Difference]: Finished difference Result 421 states and 423 transitions. [2018-10-22 15:53:12,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-22 15:53:12,696 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 249 [2018-10-22 15:53:12,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:12,697 INFO L225 Difference]: With dead ends: 421 [2018-10-22 15:53:12,697 INFO L226 Difference]: Without dead ends: 252 [2018-10-22 15:53:12,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5781 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=6362, Invalid=21694, Unknown=0, NotChecked=0, Total=28056 [2018-10-22 15:53:12,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-10-22 15:53:12,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2018-10-22 15:53:12,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-10-22 15:53:12,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2018-10-22 15:53:12,760 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 249 [2018-10-22 15:53:12,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:12,761 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2018-10-22 15:53:12,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-22 15:53:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2018-10-22 15:53:12,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-10-22 15:53:12,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:12,762 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 40, 40, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:12,762 INFO L424 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:12,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:12,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1650767619, now seen corresponding path program 80 times [2018-10-22 15:53:12,762 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:12,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:12,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:12,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:53:12,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4962 backedges. 1722 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:13,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:13,606 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:13,613 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:53:13,713 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:53:13,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:13,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4962 backedges. 1722 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:13,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:13,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-10-22 15:53:13,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-22 15:53:13,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-22 15:53:13,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:53:13,832 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand 47 states. [2018-10-22 15:53:14,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:14,908 INFO L93 Difference]: Finished difference Result 265 states and 266 transitions. [2018-10-22 15:53:14,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-22 15:53:14,908 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 251 [2018-10-22 15:53:14,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:14,909 INFO L225 Difference]: With dead ends: 265 [2018-10-22 15:53:14,909 INFO L226 Difference]: Without dead ends: 263 [2018-10-22 15:53:14,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2974, Invalid=5036, Unknown=0, NotChecked=0, Total=8010 [2018-10-22 15:53:14,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-10-22 15:53:14,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 256. [2018-10-22 15:53:14,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-22 15:53:14,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 257 transitions. [2018-10-22 15:53:14,975 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 257 transitions. Word has length 251 [2018-10-22 15:53:14,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:14,975 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 257 transitions. [2018-10-22 15:53:14,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-22 15:53:14,975 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 257 transitions. [2018-10-22 15:53:14,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-22 15:53:14,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:14,976 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:14,976 INFO L424 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:14,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:14,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1404976564, now seen corresponding path program 81 times [2018-10-22 15:53:14,977 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:14,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:14,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:14,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:14,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5125 backedges. 3403 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:17,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:17,494 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:17,503 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:53:17,668 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-22 15:53:17,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:17,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5125 backedges. 3403 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:20,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:20,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 129 [2018-10-22 15:53:20,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-10-22 15:53:20,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-10-22 15:53:20,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3783, Invalid=12729, Unknown=0, NotChecked=0, Total=16512 [2018-10-22 15:53:20,460 INFO L87 Difference]: Start difference. First operand 256 states and 257 transitions. Second operand 129 states. [2018-10-22 15:53:23,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:23,462 INFO L93 Difference]: Finished difference Result 431 states and 433 transitions. [2018-10-22 15:53:23,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-22 15:53:23,462 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 255 [2018-10-22 15:53:23,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:23,463 INFO L225 Difference]: With dead ends: 431 [2018-10-22 15:53:23,464 INFO L226 Difference]: Without dead ends: 258 [2018-10-22 15:53:23,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6069 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=6664, Invalid=22748, Unknown=0, NotChecked=0, Total=29412 [2018-10-22 15:53:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-10-22 15:53:23,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2018-10-22 15:53:23,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-10-22 15:53:23,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2018-10-22 15:53:23,541 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 255 [2018-10-22 15:53:23,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:23,541 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2018-10-22 15:53:23,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-10-22 15:53:23,541 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2018-10-22 15:53:23,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-10-22 15:53:23,542 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:23,542 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:23,543 INFO L424 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:23,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:23,543 INFO L82 PathProgramCache]: Analyzing trace with hash 903828486, now seen corresponding path program 82 times [2018-10-22 15:53:23,543 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:23,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:23,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:23,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:23,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5209 backedges. 1806 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:24,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:24,433 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:24,440 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:53:24,551 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:53:24,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:24,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:24,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5209 backedges. 1806 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:24,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:24,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-10-22 15:53:24,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-22 15:53:24,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-22 15:53:24,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:53:24,674 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand 48 states. [2018-10-22 15:53:25,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:25,795 INFO L93 Difference]: Finished difference Result 271 states and 272 transitions. [2018-10-22 15:53:25,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-22 15:53:25,796 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 257 [2018-10-22 15:53:25,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:25,797 INFO L225 Difference]: With dead ends: 271 [2018-10-22 15:53:25,797 INFO L226 Difference]: Without dead ends: 269 [2018-10-22 15:53:25,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3109, Invalid=5263, Unknown=0, NotChecked=0, Total=8372 [2018-10-22 15:53:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-10-22 15:53:25,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 262. [2018-10-22 15:53:25,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-10-22 15:53:25,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2018-10-22 15:53:25,874 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 257 [2018-10-22 15:53:25,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:25,875 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2018-10-22 15:53:25,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-22 15:53:25,875 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2018-10-22 15:53:25,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-10-22 15:53:25,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:25,876 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:25,877 INFO L424 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:25,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:25,877 INFO L82 PathProgramCache]: Analyzing trace with hash -682613297, now seen corresponding path program 83 times [2018-10-22 15:53:25,877 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:25,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:25,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:25,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:25,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5376 backedges. 3570 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:28,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:28,309 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:28,317 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:53:28,495 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-22 15:53:28,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:28,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5376 backedges. 3570 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:31,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:31,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 132 [2018-10-22 15:53:31,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-22 15:53:31,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-22 15:53:31,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3959, Invalid=13333, Unknown=0, NotChecked=0, Total=17292 [2018-10-22 15:53:31,421 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand 132 states. [2018-10-22 15:53:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:34,576 INFO L93 Difference]: Finished difference Result 441 states and 443 transitions. [2018-10-22 15:53:34,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-22 15:53:34,576 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 261 [2018-10-22 15:53:34,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:34,578 INFO L225 Difference]: With dead ends: 441 [2018-10-22 15:53:34,578 INFO L226 Difference]: Without dead ends: 264 [2018-10-22 15:53:34,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6364 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=6973, Invalid=23827, Unknown=0, NotChecked=0, Total=30800 [2018-10-22 15:53:34,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-10-22 15:53:34,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2018-10-22 15:53:34,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-10-22 15:53:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 265 transitions. [2018-10-22 15:53:34,666 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 265 transitions. Word has length 261 [2018-10-22 15:53:34,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:34,666 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 265 transitions. [2018-10-22 15:53:34,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-22 15:53:34,666 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 265 transitions. [2018-10-22 15:53:34,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-10-22 15:53:34,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:34,667 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 42, 42, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:34,668 INFO L424 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:34,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:34,668 INFO L82 PathProgramCache]: Analyzing trace with hash -838597623, now seen corresponding path program 84 times [2018-10-22 15:53:34,668 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:34,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:34,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:34,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:34,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5462 backedges. 1892 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:35,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:35,601 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:35,608 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:53:35,783 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-10-22 15:53:35,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:35,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5462 backedges. 1892 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:35,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:35,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-10-22 15:53:35,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-22 15:53:35,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-22 15:53:35,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:53:35,907 INFO L87 Difference]: Start difference. First operand 264 states and 265 transitions. Second operand 49 states. [2018-10-22 15:53:37,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:37,130 INFO L93 Difference]: Finished difference Result 277 states and 278 transitions. [2018-10-22 15:53:37,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-22 15:53:37,130 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 263 [2018-10-22 15:53:37,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:37,132 INFO L225 Difference]: With dead ends: 277 [2018-10-22 15:53:37,132 INFO L226 Difference]: Without dead ends: 275 [2018-10-22 15:53:37,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3247, Invalid=5495, Unknown=0, NotChecked=0, Total=8742 [2018-10-22 15:53:37,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-10-22 15:53:37,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 268. [2018-10-22 15:53:37,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-22 15:53:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 269 transitions. [2018-10-22 15:53:37,209 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 269 transitions. Word has length 263 [2018-10-22 15:53:37,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:37,209 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 269 transitions. [2018-10-22 15:53:37,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-22 15:53:37,209 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 269 transitions. [2018-10-22 15:53:37,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-22 15:53:37,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:37,211 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:37,211 INFO L424 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:37,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:37,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1841765458, now seen corresponding path program 85 times [2018-10-22 15:53:37,211 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:37,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:37,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:37,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:37,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-22 15:53:37,987 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 15:53:37,991 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 15:53:37,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:53:37 BoogieIcfgContainer [2018-10-22 15:53:37,992 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:53:37,992 INFO L168 Benchmark]: Toolchain (without parser) took 234890.36 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 836.2 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -686.5 MB). Peak memory consumption was 149.7 MB. Max. memory is 7.1 GB. [2018-10-22 15:53:37,993 INFO L168 Benchmark]: CDTParser took 0.21 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. [2018-10-22 15:53:37,993 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.92 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. [2018-10-22 15:53:37,994 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.97 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. [2018-10-22 15:53:37,994 INFO L168 Benchmark]: Boogie Preprocessor took 18.58 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. [2018-10-22 15:53:37,994 INFO L168 Benchmark]: RCFGBuilder took 366.57 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 773.8 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -823.9 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-10-22 15:53:37,995 INFO L168 Benchmark]: TraceAbstraction took 234169.48 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 62.4 MB). Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 126.8 MB). Peak memory consumption was 189.2 MB. Max. memory is 7.1 GB. [2018-10-22 15:53:37,997 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 296.92 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 32.97 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. * Boogie Preprocessor took 18.58 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 366.57 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 773.8 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -823.9 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 234169.48 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 62.4 MB). Free memory was 2.3 GB in the beginning and 2.1 GB in the end (delta: 126.8 MB). Peak memory consumption was 189.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 268 with TraceHistMax 44,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 44 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. TIMEOUT Result, 234.0s OverallTime, 88 OverallIterations, 44 TraceHistogramMax, 91.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3458 SDtfs, 7736 SDslu, 54513 SDs, 0 SdLazy, 55367 SolverSat, 4585 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 33.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17740 GetRequests, 11724 SyntacticMatches, 0 SemanticMatches, 6016 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125939 ImplicationChecksByTransitivity, 162.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=268occurred in iteration=87, 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: 2.6s AutomataMinimizationTime, 87 MinimizatonAttempts, 301 StatesRemovedByMinimization, 43 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.1s SsaConstructionTime, 6.7s SatisfiabilityAnalysisTime, 125.9s InterpolantComputationTime, 23380 NumberOfCodeBlocks, 23380 NumberOfCodeBlocksAsserted, 1144 NumberOfCheckSat, 23209 ConstructedInterpolants, 0 QuantifiedInterpolants, 16105227 SizeOfPredicates, 252 NumberOfNonLiveVariables, 32802 ConjunctsInSsa, 4116 ConjunctsInUnsatCore, 171 InterpolantComputations, 3 PerfectInterpolantSequences, 160904/318026 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown