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/down_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:46:47,416 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:46:47,419 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:46:47,431 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:46:47,431 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:46:47,432 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:46:47,434 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:46:47,436 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:46:47,438 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:46:47,439 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:46:47,440 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:46:47,440 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:46:47,441 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:46:47,442 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:46:47,444 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:46:47,445 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:46:47,445 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:46:47,448 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:46:47,450 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:46:47,452 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:46:47,453 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:46:47,454 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:46:47,457 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:46:47,467 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 15:46:47,499 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:46:47,500 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:46:47,501 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:46:47,501 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:46:47,502 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:46:47,502 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:46:47,503 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:46:47,503 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:46:47,503 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:46:47,503 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:46:47,503 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:46:47,504 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:46:47,505 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:46:47,505 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:46:47,505 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:46:47,505 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:46:47,506 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:46:47,506 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:46:47,506 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:46:47,506 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:46:47,506 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:46:47,507 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:46:47,508 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:46:47,508 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:46:47,509 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:46:47,509 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:46:47,509 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:46:47,509 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:46:47,561 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:46:47,574 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:46:47,578 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:46:47,580 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:46:47,580 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:46:47,581 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/down_true-unreach-call_true-termination.i [2018-10-22 15:46:47,642 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/00ca5a6d9/fbe657a959f34a22af445e0e63494bd4/FLAG6d8332dc4 [2018-10-22 15:46:48,067 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:46:48,068 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/down_true-unreach-call_true-termination.i [2018-10-22 15:46:48,074 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/00ca5a6d9/fbe657a959f34a22af445e0e63494bd4/FLAG6d8332dc4 [2018-10-22 15:46:48,088 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/00ca5a6d9/fbe657a959f34a22af445e0e63494bd4 [2018-10-22 15:46:48,098 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:46:48,100 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:46:48,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:46:48,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:46:48,105 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:46:48,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:46:48" (1/1) ... [2018-10-22 15:46:48,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@200f77fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:48, skipping insertion in model container [2018-10-22 15:46:48,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:46:48" (1/1) ... [2018-10-22 15:46:48,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:46:48,142 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:46:48,332 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:46:48,336 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:46:48,358 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:46:48,377 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:46:48,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:48 WrapperNode [2018-10-22 15:46:48,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:46:48,379 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:46:48,379 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:46:48,379 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:46:48,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:48" (1/1) ... [2018-10-22 15:46:48,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:48" (1/1) ... [2018-10-22 15:46:48,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:46:48,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:46:48,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:46:48,422 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:46:48,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:48" (1/1) ... [2018-10-22 15:46:48,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:48" (1/1) ... [2018-10-22 15:46:48,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:48" (1/1) ... [2018-10-22 15:46:48,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:48" (1/1) ... [2018-10-22 15:46:48,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:48" (1/1) ... [2018-10-22 15:46:48,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:48" (1/1) ... [2018-10-22 15:46:48,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:48" (1/1) ... [2018-10-22 15:46:48,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:46:48,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:46:48,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:46:48,449 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:46:48,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:48" (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 15:46:48,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:46:48,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:46:48,806 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:46:48,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:46:48 BoogieIcfgContainer [2018-10-22 15:46:48,807 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:46:48,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:46:48,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:46:48,812 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:46:48,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:46:48" (1/3) ... [2018-10-22 15:46:48,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18414092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:46:48, skipping insertion in model container [2018-10-22 15:46:48,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:46:48" (2/3) ... [2018-10-22 15:46:48,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18414092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:46:48, skipping insertion in model container [2018-10-22 15:46:48,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:46:48" (3/3) ... [2018-10-22 15:46:48,815 INFO L112 eAbstractionObserver]: Analyzing ICFG down_true-unreach-call_true-termination.i [2018-10-22 15:46:48,825 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:46:48,833 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:46:48,850 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:46:48,883 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:46:48,884 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:46:48,885 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:46:48,885 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:46:48,885 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:46:48,885 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:46:48,885 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:46:48,886 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:46:48,886 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:46:48,901 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-10-22 15:46:48,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-22 15:46:48,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:48,909 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:48,912 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:48,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:48,919 INFO L82 PathProgramCache]: Analyzing trace with hash 383759085, now seen corresponding path program 1 times [2018-10-22 15:46:48,921 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:48,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:48,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:48,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:48,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:49,036 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 15:46:49,039 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:46:49,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:46:49,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:46:49,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:46:49,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:46:49,057 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2018-10-22 15:46:49,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:49,074 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-10-22 15:46:49,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:46:49,075 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-10-22 15:46:49,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:49,085 INFO L225 Difference]: With dead ends: 26 [2018-10-22 15:46:49,085 INFO L226 Difference]: Without dead ends: 11 [2018-10-22 15:46:49,089 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 15:46:49,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-22 15:46:49,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-22 15:46:49,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-22 15:46:49,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-22 15:46:49,123 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-22 15:46:49,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:49,124 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-22 15:46:49,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:46:49,124 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-22 15:46:49,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-22 15:46:49,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:49,125 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:49,126 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:49,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:49,126 INFO L82 PathProgramCache]: Analyzing trace with hash 325884241, now seen corresponding path program 1 times [2018-10-22 15:46:49,126 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:49,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:49,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:49,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:49,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:49,323 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 15:46:49,323 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:46:49,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:46:49,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:46:49,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:46:49,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:46:49,327 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2018-10-22 15:46:49,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:49,701 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2018-10-22 15:46:49,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:46:49,702 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-10-22 15:46:49,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:49,702 INFO L225 Difference]: With dead ends: 22 [2018-10-22 15:46:49,703 INFO L226 Difference]: Without dead ends: 13 [2018-10-22 15:46:49,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:46:49,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-22 15:46:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-22 15:46:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-22 15:46:49,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-22 15:46:49,709 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-10-22 15:46:49,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:49,710 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-22 15:46:49,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:46:49,710 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-22 15:46:49,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 15:46:49,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:49,711 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:49,712 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:49,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:49,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1748104565, now seen corresponding path program 1 times [2018-10-22 15:46:49,713 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:49,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:49,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:49,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:49,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:49,798 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 15:46:49,799 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:46:49,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 15:46:49,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:46:49,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:46:49,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:46:49,801 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2018-10-22 15:46:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:49,997 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-22 15:46:49,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:46:49,998 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-22 15:46:49,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:49,999 INFO L225 Difference]: With dead ends: 25 [2018-10-22 15:46:49,999 INFO L226 Difference]: Without dead ends: 23 [2018-10-22 15:46:50,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:46:50,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-22 15:46:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-10-22 15:46:50,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 15:46:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-22 15:46:50,004 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2018-10-22 15:46:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:50,005 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-22 15:46:50,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:46:50,005 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-22 15:46:50,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 15:46:50,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:50,006 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:50,006 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:50,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:50,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1639575084, now seen corresponding path program 1 times [2018-10-22 15:46:50,007 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:50,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:50,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:50,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:50,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:50,242 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 15:46:50,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:50,243 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 15:46:50,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:50,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:50,320 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 15:46:50,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:50,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-22 15:46:50,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:46:50,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:46:50,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:46:50,350 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 7 states. [2018-10-22 15:46:50,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:50,555 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-10-22 15:46:50,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:46:50,556 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-10-22 15:46:50,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:50,557 INFO L225 Difference]: With dead ends: 31 [2018-10-22 15:46:50,557 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 15:46:50,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:46:50,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 15:46:50,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-22 15:46:50,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 15:46:50,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-22 15:46:50,562 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2018-10-22 15:46:50,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:50,563 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-22 15:46:50,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:46:50,563 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-22 15:46:50,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-22 15:46:50,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:50,564 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:50,564 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:50,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:50,564 INFO L82 PathProgramCache]: Analyzing trace with hash 842542990, now seen corresponding path program 2 times [2018-10-22 15:46:50,564 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:50,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:50,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:50,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:50,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:50,801 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 15:46:50,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:50,802 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 15:46:50,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:46:50,825 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:46:50,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:50,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:50,874 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 15:46:50,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:50,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-10-22 15:46:50,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:46:50,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:46:50,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:46:50,897 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2018-10-22 15:46:51,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:51,066 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-22 15:46:51,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:46:51,067 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-10-22 15:46:51,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:51,069 INFO L225 Difference]: With dead ends: 31 [2018-10-22 15:46:51,069 INFO L226 Difference]: Without dead ends: 29 [2018-10-22 15:46:51,070 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 15:46:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-22 15:46:51,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-10-22 15:46:51,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-22 15:46:51,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-22 15:46:51,076 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2018-10-22 15:46:51,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:51,076 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-22 15:46:51,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:46:51,077 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-22 15:46:51,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 15:46:51,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:51,078 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:51,078 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:51,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:51,079 INFO L82 PathProgramCache]: Analyzing trace with hash -46138025, now seen corresponding path program 3 times [2018-10-22 15:46:51,079 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:51,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:51,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:51,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:51,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:51,473 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 15:46:51,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:51,473 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 15:46:51,492 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:46:51,545 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-22 15:46:51,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:51,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:51,564 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 15:46:51,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:51,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-22 15:46:51,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:46:51,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:46:51,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:46:51,592 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2018-10-22 15:46:51,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:51,808 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-10-22 15:46:51,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:46:51,808 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2018-10-22 15:46:51,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:51,809 INFO L225 Difference]: With dead ends: 41 [2018-10-22 15:46:51,810 INFO L226 Difference]: Without dead ends: 24 [2018-10-22 15:46:51,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:46:51,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-22 15:46:51,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-22 15:46:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-22 15:46:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-22 15:46:51,815 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2018-10-22 15:46:51,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:51,816 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-22 15:46:51,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:46:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-22 15:46:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-22 15:46:51,817 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:51,817 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:51,817 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:51,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:51,818 INFO L82 PathProgramCache]: Analyzing trace with hash -676370543, now seen corresponding path program 4 times [2018-10-22 15:46:51,818 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:51,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:51,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:51,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:51,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:51,989 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 15:46:51,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:51,990 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 15:46:52,005 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:46:52,025 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:46:52,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:52,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:52,067 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 15:46:52,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:52,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-22 15:46:52,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:46:52,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:46:52,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:46:52,092 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2018-10-22 15:46:52,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:52,266 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-22 15:46:52,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:46:52,267 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2018-10-22 15:46:52,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:52,268 INFO L225 Difference]: With dead ends: 37 [2018-10-22 15:46:52,268 INFO L226 Difference]: Without dead ends: 35 [2018-10-22 15:46:52,269 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 15:46:52,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-22 15:46:52,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-10-22 15:46:52,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-22 15:46:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-10-22 15:46:52,275 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2018-10-22 15:46:52,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:52,276 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-10-22 15:46:52,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:46:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-10-22 15:46:52,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-22 15:46:52,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:52,277 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:52,277 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:52,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:52,278 INFO L82 PathProgramCache]: Analyzing trace with hash 612727770, now seen corresponding path program 5 times [2018-10-22 15:46:52,278 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:52,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:52,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:52,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:52,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:52,610 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 15:46:52,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:52,611 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 15:46:52,626 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:46:52,668 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-22 15:46:52,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:52,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:52,680 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 15:46:52,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:52,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-22 15:46:52,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:46:52,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:46:52,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:46:52,703 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 11 states. [2018-10-22 15:46:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:52,918 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-10-22 15:46:52,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:46:52,918 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2018-10-22 15:46:52,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:52,919 INFO L225 Difference]: With dead ends: 51 [2018-10-22 15:46:52,920 INFO L226 Difference]: Without dead ends: 30 [2018-10-22 15:46:52,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:46:52,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-22 15:46:52,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-22 15:46:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-22 15:46:52,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-10-22 15:46:52,925 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2018-10-22 15:46:52,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:52,926 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-10-22 15:46:52,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:46:52,926 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-10-22 15:46:52,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-22 15:46:52,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:52,927 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:52,927 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:52,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:52,928 INFO L82 PathProgramCache]: Analyzing trace with hash -2140745068, now seen corresponding path program 6 times [2018-10-22 15:46:52,928 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:52,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:52,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:52,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:52,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:53,062 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 15:46:53,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:53,063 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 15:46:53,072 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:46:53,090 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-22 15:46:53,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:53,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:53,116 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 15:46:53,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:53,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-10-22 15:46:53,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:46:53,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:46:53,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:46:53,147 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-10-22 15:46:53,427 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-10-22 15:46:53,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:53,946 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-10-22 15:46:53,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:46:53,952 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2018-10-22 15:46:53,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:53,953 INFO L225 Difference]: With dead ends: 43 [2018-10-22 15:46:53,953 INFO L226 Difference]: Without dead ends: 41 [2018-10-22 15:46:53,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:46:53,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-22 15:46:53,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2018-10-22 15:46:53,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-22 15:46:53,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-10-22 15:46:53,960 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2018-10-22 15:46:53,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:53,961 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-10-22 15:46:53,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:46:53,961 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-10-22 15:46:53,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-22 15:46:53,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:53,962 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:53,962 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:53,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:53,963 INFO L82 PathProgramCache]: Analyzing trace with hash 2109320541, now seen corresponding path program 7 times [2018-10-22 15:46:53,963 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:53,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:53,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:53,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:53,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:54,102 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 15:46:54,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:54,103 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 15:46:54,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:54,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:54,142 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 15:46:54,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:54,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-22 15:46:54,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:46:54,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:46:54,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:46:54,168 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2018-10-22 15:46:54,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:54,333 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2018-10-22 15:46:54,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:46:54,334 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2018-10-22 15:46:54,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:54,335 INFO L225 Difference]: With dead ends: 61 [2018-10-22 15:46:54,335 INFO L226 Difference]: Without dead ends: 36 [2018-10-22 15:46:54,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:46:54,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-22 15:46:54,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-22 15:46:54,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-22 15:46:54,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-22 15:46:54,342 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2018-10-22 15:46:54,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:54,342 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-22 15:46:54,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:46:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-22 15:46:54,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-22 15:46:54,343 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:54,343 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:54,344 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:54,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:54,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1946783895, now seen corresponding path program 8 times [2018-10-22 15:46:54,344 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:54,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:54,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:54,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:54,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:54,512 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 15:46:54,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:54,513 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 15:46:54,525 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:46:54,555 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:46:54,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:54,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:54,602 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 15:46:54,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:54,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-22 15:46:54,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:46:54,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:46:54,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:46:54,625 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 11 states. [2018-10-22 15:46:54,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:54,851 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-22 15:46:54,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:46:54,851 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2018-10-22 15:46:54,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:54,852 INFO L225 Difference]: With dead ends: 49 [2018-10-22 15:46:54,852 INFO L226 Difference]: Without dead ends: 47 [2018-10-22 15:46:54,853 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 15:46:54,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-22 15:46:54,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2018-10-22 15:46:54,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-22 15:46:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-10-22 15:46:54,861 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2018-10-22 15:46:54,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:54,862 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-10-22 15:46:54,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:46:54,862 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-10-22 15:46:54,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-22 15:46:54,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:54,863 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:54,864 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:54,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:54,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1173860832, now seen corresponding path program 9 times [2018-10-22 15:46:54,864 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:54,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:54,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:54,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:54,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:55,073 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 15:46:55,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:55,073 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 15:46:55,087 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:46:55,183 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-22 15:46:55,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:55,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:55,199 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 15:46:55,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:55,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-22 15:46:55,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:46:55,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:46:55,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:46:55,237 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 15 states. [2018-10-22 15:46:55,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:55,529 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-10-22 15:46:55,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:46:55,529 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2018-10-22 15:46:55,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:55,530 INFO L225 Difference]: With dead ends: 71 [2018-10-22 15:46:55,531 INFO L226 Difference]: Without dead ends: 42 [2018-10-22 15:46:55,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:46:55,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-22 15:46:55,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-22 15:46:55,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-22 15:46:55,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-10-22 15:46:55,537 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2018-10-22 15:46:55,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:55,537 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-10-22 15:46:55,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:46:55,538 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-10-22 15:46:55,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-22 15:46:55,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:55,538 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:55,539 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:55,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:55,539 INFO L82 PathProgramCache]: Analyzing trace with hash 666550682, now seen corresponding path program 10 times [2018-10-22 15:46:55,539 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:55,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:55,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:55,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:55,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:55,697 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 15:46:55,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:55,698 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 15:46:55,707 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:46:55,757 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:46:55,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:55,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:55,947 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 15:46:55,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:55,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-22 15:46:55,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:46:55,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:46:55,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:46:55,981 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 12 states. [2018-10-22 15:46:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:56,511 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-10-22 15:46:56,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:46:56,512 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2018-10-22 15:46:56,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:56,513 INFO L225 Difference]: With dead ends: 55 [2018-10-22 15:46:56,513 INFO L226 Difference]: Without dead ends: 53 [2018-10-22 15:46:56,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:46:56,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-22 15:46:56,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2018-10-22 15:46:56,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-22 15:46:56,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-10-22 15:46:56,523 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2018-10-22 15:46:56,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:56,523 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-10-22 15:46:56,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:46:56,523 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-10-22 15:46:56,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-22 15:46:56,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:56,524 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:56,524 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:56,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:56,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1808968035, now seen corresponding path program 11 times [2018-10-22 15:46:56,525 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:56,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:56,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:56,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:56,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:56,698 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 15:46:56,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:56,699 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 15:46:56,707 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:46:56,776 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-22 15:46:56,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:56,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:56,799 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 15:46:56,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:56,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-22 15:46:56,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:46:56,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:46:56,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:46:56,832 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 17 states. [2018-10-22 15:46:57,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:57,312 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-10-22 15:46:57,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:46:57,313 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2018-10-22 15:46:57,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:57,314 INFO L225 Difference]: With dead ends: 81 [2018-10-22 15:46:57,314 INFO L226 Difference]: Without dead ends: 48 [2018-10-22 15:46:57,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:46:57,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-22 15:46:57,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-22 15:46:57,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-22 15:46:57,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-22 15:46:57,323 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2018-10-22 15:46:57,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:57,323 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-22 15:46:57,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:46:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-22 15:46:57,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-22 15:46:57,324 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:57,324 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:57,325 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:57,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:57,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1676311139, now seen corresponding path program 12 times [2018-10-22 15:46:57,325 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:57,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:57,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:57,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:57,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:57,493 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 15:46:57,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:57,493 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 15:46:57,501 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:46:57,559 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-22 15:46:57,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:57,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:57,608 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 15:46:57,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:57,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-22 15:46:57,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:46:57,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:46:57,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:46:57,631 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 13 states. [2018-10-22 15:46:57,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:57,856 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-22 15:46:57,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:46:57,856 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2018-10-22 15:46:57,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:57,857 INFO L225 Difference]: With dead ends: 61 [2018-10-22 15:46:57,858 INFO L226 Difference]: Without dead ends: 59 [2018-10-22 15:46:57,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:46:57,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-22 15:46:57,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2018-10-22 15:46:57,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-22 15:46:57,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-10-22 15:46:57,868 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2018-10-22 15:46:57,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:57,868 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-10-22 15:46:57,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:46:57,868 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-10-22 15:46:57,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-22 15:46:57,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:57,869 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:57,870 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:57,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:57,870 INFO L82 PathProgramCache]: Analyzing trace with hash -313150490, now seen corresponding path program 13 times [2018-10-22 15:46:57,870 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:57,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:57,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:57,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:57,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:58,456 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 15:46:58,457 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:58,457 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 15:46:58,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:58,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:58,527 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 15:46:58,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:58,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-22 15:46:58,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:46:58,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:46:58,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:46:58,560 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 19 states. [2018-10-22 15:46:58,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:58,897 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-10-22 15:46:58,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-22 15:46:58,897 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2018-10-22 15:46:58,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:58,898 INFO L225 Difference]: With dead ends: 91 [2018-10-22 15:46:58,898 INFO L226 Difference]: Without dead ends: 54 [2018-10-22 15:46:58,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:46:58,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-22 15:46:58,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-22 15:46:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-22 15:46:58,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-10-22 15:46:58,906 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2018-10-22 15:46:58,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:58,907 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-10-22 15:46:58,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:46:58,907 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-10-22 15:46:58,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-22 15:46:58,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:58,908 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:58,908 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:58,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:58,908 INFO L82 PathProgramCache]: Analyzing trace with hash 992804000, now seen corresponding path program 14 times [2018-10-22 15:46:58,909 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:58,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:58,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:58,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:46:58,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:59,194 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 15:46:59,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:59,194 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 15:46:59,204 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:46:59,238 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:46:59,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:59,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:46:59,312 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 15:46:59,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:46:59,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-10-22 15:46:59,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:46:59,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:46:59,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:46:59,335 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 14 states. [2018-10-22 15:46:59,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:46:59,661 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-10-22 15:46:59,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:46:59,662 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-10-22 15:46:59,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:46:59,663 INFO L225 Difference]: With dead ends: 67 [2018-10-22 15:46:59,663 INFO L226 Difference]: Without dead ends: 65 [2018-10-22 15:46:59,664 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 15:46:59,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-22 15:46:59,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2018-10-22 15:46:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-22 15:46:59,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-10-22 15:46:59,673 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2018-10-22 15:46:59,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:46:59,674 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-10-22 15:46:59,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:46:59,674 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-10-22 15:46:59,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-22 15:46:59,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:46:59,675 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-22 15:46:59,675 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:46:59,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:46:59,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1241255575, now seen corresponding path program 15 times [2018-10-22 15:46:59,675 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:46:59,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:46:59,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:59,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:46:59,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:46:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:46:59,951 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 15:46:59,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:46:59,951 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 15:46:59,958 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:46:59,985 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-22 15:46:59,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:46:59,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:00,000 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 15:47:00,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:00,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-22 15:47:00,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:47:00,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:47:00,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:47:00,022 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 21 states. [2018-10-22 15:47:00,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:00,404 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-10-22 15:47:00,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 15:47:00,405 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2018-10-22 15:47:00,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:00,406 INFO L225 Difference]: With dead ends: 101 [2018-10-22 15:47:00,406 INFO L226 Difference]: Without dead ends: 60 [2018-10-22 15:47:00,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:47:00,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-22 15:47:00,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-22 15:47:00,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-22 15:47:00,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-10-22 15:47:00,416 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2018-10-22 15:47:00,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:00,416 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-10-22 15:47:00,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:47:00,417 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-10-22 15:47:00,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-22 15:47:00,418 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:00,418 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:00,418 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:00,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:00,418 INFO L82 PathProgramCache]: Analyzing trace with hash 915162787, now seen corresponding path program 16 times [2018-10-22 15:47:00,419 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:00,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:00,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:00,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:00,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:00,574 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 15:47:00,574 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:00,574 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 15:47:00,582 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:47:00,609 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:47:00,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:00,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:00,673 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 15:47:00,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:00,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-22 15:47:00,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:47:00,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:47:00,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:47:00,696 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 15 states. [2018-10-22 15:47:00,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:00,929 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-22 15:47:00,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 15:47:00,929 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2018-10-22 15:47:00,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:00,930 INFO L225 Difference]: With dead ends: 73 [2018-10-22 15:47:00,930 INFO L226 Difference]: Without dead ends: 71 [2018-10-22 15:47:00,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:47:00,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-22 15:47:00,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2018-10-22 15:47:00,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-22 15:47:00,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-10-22 15:47:00,940 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2018-10-22 15:47:00,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:00,941 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-10-22 15:47:00,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:47:00,941 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-10-22 15:47:00,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-22 15:47:00,941 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:00,942 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:00,942 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:00,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:00,942 INFO L82 PathProgramCache]: Analyzing trace with hash -52919828, now seen corresponding path program 17 times [2018-10-22 15:47:00,942 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:00,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:00,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:00,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:00,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:01,213 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 15:47:01,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:01,213 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 15:47:01,221 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:47:01,253 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-22 15:47:01,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:01,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:01,270 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 15:47:01,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:01,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-22 15:47:01,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:47:01,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:47:01,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:47:01,293 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 23 states. [2018-10-22 15:47:02,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:02,100 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-10-22 15:47:02,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:47:02,101 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2018-10-22 15:47:02,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:02,102 INFO L225 Difference]: With dead ends: 111 [2018-10-22 15:47:02,102 INFO L226 Difference]: Without dead ends: 66 [2018-10-22 15:47:02,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:47:02,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-22 15:47:02,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-22 15:47:02,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-22 15:47:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-10-22 15:47:02,110 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 63 [2018-10-22 15:47:02,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:02,110 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-10-22 15:47:02,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:47:02,111 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-10-22 15:47:02,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-22 15:47:02,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:02,112 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:02,112 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:02,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:02,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1698071462, now seen corresponding path program 18 times [2018-10-22 15:47:02,112 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:02,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:02,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:02,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:02,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:03,026 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 15:47:03,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:03,027 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 15:47:03,036 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:47:03,072 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-22 15:47:03,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:03,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:03,148 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 15:47:03,169 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:03,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-22 15:47:03,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:47:03,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:47:03,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:47:03,170 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 16 states. [2018-10-22 15:47:03,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:03,691 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-10-22 15:47:03,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:47:03,691 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2018-10-22 15:47:03,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:03,692 INFO L225 Difference]: With dead ends: 79 [2018-10-22 15:47:03,692 INFO L226 Difference]: Without dead ends: 77 [2018-10-22 15:47:03,692 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 15:47:03,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-22 15:47:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2018-10-22 15:47:03,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-22 15:47:03,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-10-22 15:47:03,700 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2018-10-22 15:47:03,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:03,700 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-10-22 15:47:03,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:47:03,700 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-10-22 15:47:03,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-22 15:47:03,701 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:03,701 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:03,701 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:03,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:03,701 INFO L82 PathProgramCache]: Analyzing trace with hash 575047023, now seen corresponding path program 19 times [2018-10-22 15:47:03,701 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:03,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:03,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:03,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:03,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:04,148 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 15:47:04,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:04,149 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 15:47:04,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:04,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:04,198 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 15:47:04,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:04,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-22 15:47:04,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:47:04,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:47:04,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:47:04,221 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 25 states. [2018-10-22 15:47:04,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:04,543 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2018-10-22 15:47:04,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-22 15:47:04,543 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2018-10-22 15:47:04,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:04,544 INFO L225 Difference]: With dead ends: 121 [2018-10-22 15:47:04,544 INFO L226 Difference]: Without dead ends: 72 [2018-10-22 15:47:04,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=995, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:47:04,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-22 15:47:04,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-22 15:47:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-22 15:47:04,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-10-22 15:47:04,553 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2018-10-22 15:47:04,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:04,554 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-10-22 15:47:04,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:47:04,554 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-10-22 15:47:04,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-22 15:47:04,554 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:04,554 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:04,555 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:04,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:04,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1582902359, now seen corresponding path program 20 times [2018-10-22 15:47:04,555 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:04,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:04,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:04,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:04,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:05,083 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 15:47:05,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:05,084 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 15:47:05,091 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:47:05,127 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:47:05,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:05,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:05,260 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 15:47:05,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:05,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-22 15:47:05,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:47:05,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:47:05,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:47:05,282 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 17 states. [2018-10-22 15:47:05,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:05,597 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-22 15:47:05,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 15:47:05,598 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2018-10-22 15:47:05,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:05,598 INFO L225 Difference]: With dead ends: 85 [2018-10-22 15:47:05,598 INFO L226 Difference]: Without dead ends: 83 [2018-10-22 15:47:05,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=319, Invalid=551, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:47:05,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-22 15:47:05,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2018-10-22 15:47:05,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-22 15:47:05,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-10-22 15:47:05,607 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2018-10-22 15:47:05,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:05,608 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-10-22 15:47:05,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:47:05,608 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-10-22 15:47:05,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-22 15:47:05,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:05,609 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:05,609 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:05,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:05,609 INFO L82 PathProgramCache]: Analyzing trace with hash 238623730, now seen corresponding path program 21 times [2018-10-22 15:47:05,609 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:05,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:05,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:05,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:05,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:06,039 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 15:47:06,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:06,040 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 15:47:06,047 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:47:06,088 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-22 15:47:06,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:06,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:06,106 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 15:47:06,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:06,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-22 15:47:06,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 15:47:06,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 15:47:06,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:47:06,134 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 27 states. [2018-10-22 15:47:06,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:06,494 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-10-22 15:47:06,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 15:47:06,494 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 75 [2018-10-22 15:47:06,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:06,495 INFO L225 Difference]: With dead ends: 131 [2018-10-22 15:47:06,495 INFO L226 Difference]: Without dead ends: 78 [2018-10-22 15:47:06,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=391, Invalid=1169, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:47:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-22 15:47:06,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-22 15:47:06,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-22 15:47:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-10-22 15:47:06,506 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2018-10-22 15:47:06,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:06,507 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-10-22 15:47:06,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 15:47:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-10-22 15:47:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-22 15:47:06,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:06,508 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:06,508 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:06,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:06,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1479518548, now seen corresponding path program 22 times [2018-10-22 15:47:06,509 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:06,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:06,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:06,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:06,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:06,738 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 15:47:06,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:06,738 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 15:47:06,745 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:47:06,781 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:47:06,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:06,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:06,817 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 15:47:06,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:06,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-10-22 15:47:06,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:47:06,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:47:06,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:47:06,838 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 18 states. [2018-10-22 15:47:07,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:07,331 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-10-22 15:47:07,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 15:47:07,332 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2018-10-22 15:47:07,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:07,332 INFO L225 Difference]: With dead ends: 91 [2018-10-22 15:47:07,332 INFO L226 Difference]: Without dead ends: 89 [2018-10-22 15:47:07,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=364, Invalid=628, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:47:07,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-22 15:47:07,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2018-10-22 15:47:07,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-22 15:47:07,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-10-22 15:47:07,343 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2018-10-22 15:47:07,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:07,343 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-10-22 15:47:07,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:47:07,344 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-10-22 15:47:07,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-22 15:47:07,344 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:07,345 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:07,345 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:07,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:07,345 INFO L82 PathProgramCache]: Analyzing trace with hash 236152181, now seen corresponding path program 23 times [2018-10-22 15:47:07,345 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:07,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:07,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:07,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:07,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:07,732 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 15:47:07,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:07,732 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 15:47:07,740 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:47:07,782 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-22 15:47:07,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:07,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:07,797 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 15:47:07,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:07,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-22 15:47:07,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:47:07,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:47:07,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:47:07,819 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 29 states. [2018-10-22 15:47:08,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:08,619 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-10-22 15:47:08,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:47:08,619 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2018-10-22 15:47:08,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:08,620 INFO L225 Difference]: With dead ends: 141 [2018-10-22 15:47:08,620 INFO L226 Difference]: Without dead ends: 84 [2018-10-22 15:47:08,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:47:08,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-22 15:47:08,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-22 15:47:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-22 15:47:08,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-10-22 15:47:08,632 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2018-10-22 15:47:08,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:08,632 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-10-22 15:47:08,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:47:08,632 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-10-22 15:47:08,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-22 15:47:08,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:08,633 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:08,633 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:08,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:08,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1931357359, now seen corresponding path program 24 times [2018-10-22 15:47:08,633 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:08,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:08,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:08,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:08,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:08,897 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 15:47:08,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:08,897 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 15:47:08,907 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:47:08,947 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-22 15:47:08,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:08,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:09,006 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 15:47:09,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:09,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-10-22 15:47:09,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:47:09,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:47:09,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:47:09,032 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 19 states. [2018-10-22 15:47:09,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:09,309 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-22 15:47:09,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 15:47:09,312 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2018-10-22 15:47:09,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:09,313 INFO L225 Difference]: With dead ends: 97 [2018-10-22 15:47:09,313 INFO L226 Difference]: Without dead ends: 95 [2018-10-22 15:47:09,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=412, Invalid=710, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:47:09,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-22 15:47:09,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2018-10-22 15:47:09,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-22 15:47:09,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-10-22 15:47:09,325 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2018-10-22 15:47:09,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:09,326 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-10-22 15:47:09,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:47:09,326 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-10-22 15:47:09,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-22 15:47:09,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:09,326 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:09,327 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:09,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:09,327 INFO L82 PathProgramCache]: Analyzing trace with hash 850428408, now seen corresponding path program 25 times [2018-10-22 15:47:09,327 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:09,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:09,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:09,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:09,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:10,409 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 15:47:10,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:10,409 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 15:47:10,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:10,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:10,470 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 15:47:10,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:10,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-22 15:47:10,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:47:10,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:47:10,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:47:10,491 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 31 states. [2018-10-22 15:47:11,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:11,428 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-10-22 15:47:11,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 15:47:11,429 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 87 [2018-10-22 15:47:11,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:11,429 INFO L225 Difference]: With dead ends: 151 [2018-10-22 15:47:11,429 INFO L226 Difference]: Without dead ends: 90 [2018-10-22 15:47:11,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=511, Invalid=1559, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:47:11,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-22 15:47:11,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-22 15:47:11,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-22 15:47:11,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-10-22 15:47:11,442 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 87 [2018-10-22 15:47:11,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:11,442 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-10-22 15:47:11,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:47:11,442 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-10-22 15:47:11,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-22 15:47:11,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:11,443 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:11,443 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:11,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:11,443 INFO L82 PathProgramCache]: Analyzing trace with hash 477328818, now seen corresponding path program 26 times [2018-10-22 15:47:11,443 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:11,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:11,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:11,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:11,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:12,397 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 15:47:12,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:12,398 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 15:47:12,417 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:47:12,454 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:47:12,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:12,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:12,504 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 15:47:12,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:12,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-10-22 15:47:12,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:47:12,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:47:12,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:47:12,527 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 20 states. [2018-10-22 15:47:12,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:12,838 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-10-22 15:47:12,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-22 15:47:12,838 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2018-10-22 15:47:12,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:12,839 INFO L225 Difference]: With dead ends: 103 [2018-10-22 15:47:12,839 INFO L226 Difference]: Without dead ends: 101 [2018-10-22 15:47:12,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=463, Invalid=797, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:47:12,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-22 15:47:12,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2018-10-22 15:47:12,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-22 15:47:12,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-10-22 15:47:12,853 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 89 [2018-10-22 15:47:12,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:12,853 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-10-22 15:47:12,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:47:12,854 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-10-22 15:47:12,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-22 15:47:12,854 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:12,854 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:12,854 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:12,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:12,854 INFO L82 PathProgramCache]: Analyzing trace with hash 778277243, now seen corresponding path program 27 times [2018-10-22 15:47:12,855 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:12,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:12,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:12,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:12,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:13,555 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 15:47:13,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:13,556 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 15:47:13,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:47:13,621 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-22 15:47:13,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:13,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:13,641 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 15:47:13,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:13,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-22 15:47:13,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:47:13,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:47:13,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:47:13,667 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 33 states. [2018-10-22 15:47:14,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:14,260 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-10-22 15:47:14,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-22 15:47:14,261 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 93 [2018-10-22 15:47:14,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:14,261 INFO L225 Difference]: With dead ends: 161 [2018-10-22 15:47:14,262 INFO L226 Difference]: Without dead ends: 96 [2018-10-22 15:47:14,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=577, Invalid=1775, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:47:14,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-22 15:47:14,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-22 15:47:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-22 15:47:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-10-22 15:47:14,278 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 93 [2018-10-22 15:47:14,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:14,278 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-10-22 15:47:14,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 15:47:14,278 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-10-22 15:47:14,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-22 15:47:14,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:14,279 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:14,279 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:14,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:14,280 INFO L82 PathProgramCache]: Analyzing trace with hash 942363061, now seen corresponding path program 28 times [2018-10-22 15:47:14,280 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:14,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:14,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:14,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:14,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:14,511 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 15:47:14,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:14,511 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 15:47:14,518 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:47:14,561 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:47:14,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:14,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:14,589 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 15:47:14,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:14,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-10-22 15:47:14,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:47:14,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:47:14,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:47:14,611 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 21 states. [2018-10-22 15:47:14,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:14,930 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-22 15:47:14,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-22 15:47:14,931 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 95 [2018-10-22 15:47:14,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:14,932 INFO L225 Difference]: With dead ends: 109 [2018-10-22 15:47:14,932 INFO L226 Difference]: Without dead ends: 107 [2018-10-22 15:47:14,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=517, Invalid=889, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:47:14,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-22 15:47:14,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2018-10-22 15:47:14,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-22 15:47:14,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-10-22 15:47:14,948 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2018-10-22 15:47:14,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:14,948 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-10-22 15:47:14,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:47:14,948 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-10-22 15:47:14,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-22 15:47:14,949 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:14,949 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:14,949 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:14,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:14,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1292389378, now seen corresponding path program 29 times [2018-10-22 15:47:14,950 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:14,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:14,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:14,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:14,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:15,492 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 15:47:15,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:15,492 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 15:47:15,500 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:47:15,708 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-22 15:47:15,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:15,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:15,728 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 15:47:15,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:15,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-22 15:47:15,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:47:15,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:47:15,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:47:15,752 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 35 states. [2018-10-22 15:47:16,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:16,408 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-10-22 15:47:16,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 15:47:16,408 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 99 [2018-10-22 15:47:16,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:16,409 INFO L225 Difference]: With dead ends: 171 [2018-10-22 15:47:16,409 INFO L226 Difference]: Without dead ends: 102 [2018-10-22 15:47:16,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=647, Invalid=2005, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:47:16,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-22 15:47:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-22 15:47:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-22 15:47:16,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-10-22 15:47:16,426 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2018-10-22 15:47:16,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:16,426 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-10-22 15:47:16,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:47:16,427 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-10-22 15:47:16,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-22 15:47:16,427 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:16,427 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:16,427 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:16,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:16,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1273438024, now seen corresponding path program 30 times [2018-10-22 15:47:16,428 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:16,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:16,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:16,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:16,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:16,725 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 15:47:16,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:16,726 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 15:47:16,733 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:47:16,787 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-22 15:47:16,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:16,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:16,940 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 15:47:16,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:16,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-10-22 15:47:16,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:47:16,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:47:16,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:47:16,963 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 22 states. [2018-10-22 15:47:17,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:17,469 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-10-22 15:47:17,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-22 15:47:17,470 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2018-10-22 15:47:17,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:17,470 INFO L225 Difference]: With dead ends: 115 [2018-10-22 15:47:17,470 INFO L226 Difference]: Without dead ends: 113 [2018-10-22 15:47:17,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=986, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:47:17,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-22 15:47:17,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 106. [2018-10-22 15:47:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-22 15:47:17,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-10-22 15:47:17,486 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2018-10-22 15:47:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:17,486 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-10-22 15:47:17,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:47:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-10-22 15:47:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-22 15:47:17,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:17,487 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:17,487 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:17,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:17,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1336936833, now seen corresponding path program 31 times [2018-10-22 15:47:17,487 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:17,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:17,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:17,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:17,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:18,071 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 15:47:18,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:18,071 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 15:47:18,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:18,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:18,137 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 15:47:18,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:18,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-22 15:47:18,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:47:18,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:47:18,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:47:18,158 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 37 states. [2018-10-22 15:47:20,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:20,020 INFO L93 Difference]: Finished difference Result 181 states and 183 transitions. [2018-10-22 15:47:20,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-22 15:47:20,020 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 105 [2018-10-22 15:47:20,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:20,021 INFO L225 Difference]: With dead ends: 181 [2018-10-22 15:47:20,021 INFO L226 Difference]: Without dead ends: 108 [2018-10-22 15:47:20,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2018-10-22 15:47:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-22 15:47:20,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-22 15:47:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-22 15:47:20,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-10-22 15:47:20,036 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 105 [2018-10-22 15:47:20,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:20,036 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-10-22 15:47:20,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:47:20,036 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-10-22 15:47:20,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-22 15:47:20,037 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:20,037 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:20,037 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:20,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:20,037 INFO L82 PathProgramCache]: Analyzing trace with hash 898056891, now seen corresponding path program 32 times [2018-10-22 15:47:20,037 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:20,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:20,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:20,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:20,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:20,361 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 15:47:20,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:20,362 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 15:47:20,370 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:47:20,420 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:47:20,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:20,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:20,465 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 15:47:20,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:20,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-10-22 15:47:20,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:47:20,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:47:20,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:47:20,486 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 23 states. [2018-10-22 15:47:20,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:20,864 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-22 15:47:20,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-22 15:47:20,865 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2018-10-22 15:47:20,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:20,866 INFO L225 Difference]: With dead ends: 121 [2018-10-22 15:47:20,866 INFO L226 Difference]: Without dead ends: 119 [2018-10-22 15:47:20,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=634, Invalid=1088, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:47:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-22 15:47:20,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2018-10-22 15:47:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-22 15:47:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-10-22 15:47:20,883 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2018-10-22 15:47:20,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:20,883 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-10-22 15:47:20,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:47:20,883 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-10-22 15:47:20,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-22 15:47:20,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:20,884 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:20,884 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:20,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:20,884 INFO L82 PathProgramCache]: Analyzing trace with hash -817384956, now seen corresponding path program 33 times [2018-10-22 15:47:20,884 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:20,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:20,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:20,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:20,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:21,418 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 15:47:21,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:21,418 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 15:47:21,425 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:47:21,482 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-22 15:47:21,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:21,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:21,501 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 15:47:21,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:21,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-22 15:47:21,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-22 15:47:21,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-22 15:47:21,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:47:21,523 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 39 states. [2018-10-22 15:47:22,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:22,575 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2018-10-22 15:47:22,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-22 15:47:22,575 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 111 [2018-10-22 15:47:22,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:22,576 INFO L225 Difference]: With dead ends: 191 [2018-10-22 15:47:22,576 INFO L226 Difference]: Without dead ends: 114 [2018-10-22 15:47:22,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=799, Invalid=2507, Unknown=0, NotChecked=0, Total=3306 [2018-10-22 15:47:22,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-22 15:47:22,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-22 15:47:22,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-22 15:47:22,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-10-22 15:47:22,592 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 111 [2018-10-22 15:47:22,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:22,592 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-10-22 15:47:22,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-22 15:47:22,593 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-10-22 15:47:22,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-22 15:47:22,593 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:22,593 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:22,594 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:22,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:22,594 INFO L82 PathProgramCache]: Analyzing trace with hash -147220546, now seen corresponding path program 34 times [2018-10-22 15:47:22,594 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:22,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:22,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:22,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:22,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:23,031 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 15:47:23,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:23,031 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 15:47:23,038 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:47:23,092 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:47:23,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:23,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:23,393 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 15:47:23,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:23,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-10-22 15:47:23,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 15:47:23,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 15:47:23,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:47:23,433 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 24 states. [2018-10-22 15:47:24,302 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-10-22 15:47:25,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:25,737 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2018-10-22 15:47:25,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-22 15:47:25,739 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2018-10-22 15:47:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:25,739 INFO L225 Difference]: With dead ends: 127 [2018-10-22 15:47:25,739 INFO L226 Difference]: Without dead ends: 125 [2018-10-22 15:47:25,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=697, Invalid=1195, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:47:25,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-22 15:47:25,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2018-10-22 15:47:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-22 15:47:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-10-22 15:47:25,761 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 113 [2018-10-22 15:47:25,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:25,761 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-10-22 15:47:25,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 15:47:25,761 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-10-22 15:47:25,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-22 15:47:25,762 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:25,762 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:25,762 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:25,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:25,763 INFO L82 PathProgramCache]: Analyzing trace with hash 368168327, now seen corresponding path program 35 times [2018-10-22 15:47:25,763 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:25,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:25,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:25,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:25,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:26,594 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 15:47:26,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:26,595 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 15:47:26,602 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:47:26,747 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-22 15:47:26,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:26,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:26,767 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 15:47:26,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:26,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-22 15:47:26,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:47:26,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:47:26,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:47:26,788 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 41 states. [2018-10-22 15:47:27,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:27,385 INFO L93 Difference]: Finished difference Result 201 states and 203 transitions. [2018-10-22 15:47:27,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-22 15:47:27,385 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 117 [2018-10-22 15:47:27,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:27,386 INFO L225 Difference]: With dead ends: 201 [2018-10-22 15:47:27,386 INFO L226 Difference]: Without dead ends: 120 [2018-10-22 15:47:27,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=881, Invalid=2779, Unknown=0, NotChecked=0, Total=3660 [2018-10-22 15:47:27,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-22 15:47:27,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-22 15:47:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-22 15:47:27,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2018-10-22 15:47:27,411 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 117 [2018-10-22 15:47:27,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:27,412 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2018-10-22 15:47:27,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 15:47:27,412 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2018-10-22 15:47:27,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-22 15:47:27,413 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:27,413 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:27,413 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:27,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:27,414 INFO L82 PathProgramCache]: Analyzing trace with hash 661323713, now seen corresponding path program 36 times [2018-10-22 15:47:27,414 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:27,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:27,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:27,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:27,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:28,257 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 15:47:28,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:28,258 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:47:28,271 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:47:28,333 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-22 15:47:28,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:28,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:28,665 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 15:47:28,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:28,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-10-22 15:47:28,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:47:28,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:47:28,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:47:28,704 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 25 states. [2018-10-22 15:47:29,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:29,868 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-10-22 15:47:29,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-22 15:47:29,869 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 119 [2018-10-22 15:47:29,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:29,870 INFO L225 Difference]: With dead ends: 133 [2018-10-22 15:47:29,870 INFO L226 Difference]: Without dead ends: 131 [2018-10-22 15:47:29,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=763, Invalid=1307, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:47:29,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-22 15:47:29,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2018-10-22 15:47:29,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-22 15:47:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2018-10-22 15:47:29,889 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 119 [2018-10-22 15:47:29,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:29,889 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2018-10-22 15:47:29,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:47:29,890 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2018-10-22 15:47:29,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-22 15:47:29,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:29,890 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:29,890 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:29,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:29,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2136570890, now seen corresponding path program 37 times [2018-10-22 15:47:29,891 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:29,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:29,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:29,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:29,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:30,576 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 15:47:30,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:30,576 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 15:47:30,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:30,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:30,657 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 15:47:30,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:30,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-22 15:47:30,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-22 15:47:30,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-22 15:47:30,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1343, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:47:30,680 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 43 states. [2018-10-22 15:47:31,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:31,821 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2018-10-22 15:47:31,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-22 15:47:31,821 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 123 [2018-10-22 15:47:31,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:31,822 INFO L225 Difference]: With dead ends: 211 [2018-10-22 15:47:31,822 INFO L226 Difference]: Without dead ends: 126 [2018-10-22 15:47:31,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=967, Invalid=3065, Unknown=0, NotChecked=0, Total=4032 [2018-10-22 15:47:31,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-22 15:47:31,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-22 15:47:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-22 15:47:31,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2018-10-22 15:47:31,848 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 123 [2018-10-22 15:47:31,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:31,849 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2018-10-22 15:47:31,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-22 15:47:31,849 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2018-10-22 15:47:31,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-22 15:47:31,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:31,850 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:31,850 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:31,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:31,850 INFO L82 PathProgramCache]: Analyzing trace with hash -976315708, now seen corresponding path program 38 times [2018-10-22 15:47:31,851 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:31,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:31,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:31,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:31,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:32,598 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 15:47:32,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:32,599 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 15:47:32,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:47:32,664 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:47:32,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:32,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:32,733 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 15:47:32,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:32,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-10-22 15:47:32,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-22 15:47:32,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-22 15:47:32,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:47:32,754 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 26 states. [2018-10-22 15:47:33,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:33,303 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2018-10-22 15:47:33,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-22 15:47:33,303 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 125 [2018-10-22 15:47:33,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:33,304 INFO L225 Difference]: With dead ends: 139 [2018-10-22 15:47:33,304 INFO L226 Difference]: Without dead ends: 137 [2018-10-22 15:47:33,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=832, Invalid=1424, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:47:33,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-22 15:47:33,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2018-10-22 15:47:33,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-22 15:47:33,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2018-10-22 15:47:33,331 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 125 [2018-10-22 15:47:33,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:33,332 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2018-10-22 15:47:33,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-22 15:47:33,332 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2018-10-22 15:47:33,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-22 15:47:33,332 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:33,333 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:33,333 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:33,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:33,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1130242675, now seen corresponding path program 39 times [2018-10-22 15:47:33,333 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:33,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:33,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:33,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:33,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:34,655 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 15:47:34,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:34,655 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 15:47:34,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:47:34,736 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-22 15:47:34,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:34,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:34,765 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 15:47:34,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:34,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-22 15:47:34,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-22 15:47:34,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-22 15:47:34,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:47:34,795 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 45 states. [2018-10-22 15:47:35,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:35,842 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2018-10-22 15:47:35,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-22 15:47:35,842 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 129 [2018-10-22 15:47:35,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:35,843 INFO L225 Difference]: With dead ends: 221 [2018-10-22 15:47:35,843 INFO L226 Difference]: Without dead ends: 132 [2018-10-22 15:47:35,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1057, Invalid=3365, Unknown=0, NotChecked=0, Total=4422 [2018-10-22 15:47:35,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-22 15:47:35,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-10-22 15:47:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-22 15:47:35,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2018-10-22 15:47:35,871 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2018-10-22 15:47:35,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:35,871 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2018-10-22 15:47:35,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-22 15:47:35,871 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2018-10-22 15:47:35,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-22 15:47:35,872 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:35,872 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:35,872 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:35,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:35,873 INFO L82 PathProgramCache]: Analyzing trace with hash 26183879, now seen corresponding path program 40 times [2018-10-22 15:47:35,873 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:35,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:35,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:35,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:35,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:36,384 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 15:47:36,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:36,385 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 15:47:36,391 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:47:36,442 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:47:36,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:36,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:36,509 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 15:47:36,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:36,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-10-22 15:47:36,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 15:47:36,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 15:47:36,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:47:36,530 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 27 states. [2018-10-22 15:47:37,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:37,029 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-10-22 15:47:37,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-22 15:47:37,030 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 131 [2018-10-22 15:47:37,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:37,031 INFO L225 Difference]: With dead ends: 145 [2018-10-22 15:47:37,032 INFO L226 Difference]: Without dead ends: 143 [2018-10-22 15:47:37,032 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 15:47:37,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-22 15:47:37,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2018-10-22 15:47:37,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-22 15:47:37,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2018-10-22 15:47:37,058 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 131 [2018-10-22 15:47:37,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:37,058 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2018-10-22 15:47:37,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 15:47:37,058 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2018-10-22 15:47:37,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-22 15:47:37,059 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:37,059 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:37,059 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:37,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:37,059 INFO L82 PathProgramCache]: Analyzing trace with hash 845550096, now seen corresponding path program 41 times [2018-10-22 15:47:37,059 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:37,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:37,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:37,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:37,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:38,136 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 15:47:38,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:38,136 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 15:47:38,143 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:47:38,221 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-22 15:47:38,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:38,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:38,251 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 15:47:38,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:38,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-22 15:47:38,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-22 15:47:38,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-22 15:47:38,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=1609, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:47:38,282 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 47 states. [2018-10-22 15:47:39,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:39,427 INFO L93 Difference]: Finished difference Result 231 states and 233 transitions. [2018-10-22 15:47:39,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-22 15:47:39,427 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 135 [2018-10-22 15:47:39,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:39,427 INFO L225 Difference]: With dead ends: 231 [2018-10-22 15:47:39,428 INFO L226 Difference]: Without dead ends: 138 [2018-10-22 15:47:39,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1151, Invalid=3679, Unknown=0, NotChecked=0, Total=4830 [2018-10-22 15:47:39,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-22 15:47:39,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-22 15:47:39,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-22 15:47:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2018-10-22 15:47:39,451 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 135 [2018-10-22 15:47:39,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:39,451 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2018-10-22 15:47:39,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-22 15:47:39,451 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2018-10-22 15:47:39,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-22 15:47:39,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:39,452 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:39,452 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:39,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:39,452 INFO L82 PathProgramCache]: Analyzing trace with hash 391178698, now seen corresponding path program 42 times [2018-10-22 15:47:39,452 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:39,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:39,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:39,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:39,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:39,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:39,906 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 15:47:39,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:39,906 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 15:47:39,913 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:47:39,986 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-22 15:47:39,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:39,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:40,051 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 15:47:40,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:40,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-10-22 15:47:40,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:47:40,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:47:40,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:47:40,073 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 28 states. [2018-10-22 15:47:40,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:40,554 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2018-10-22 15:47:40,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-22 15:47:40,554 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 137 [2018-10-22 15:47:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:40,555 INFO L225 Difference]: With dead ends: 151 [2018-10-22 15:47:40,555 INFO L226 Difference]: Without dead ends: 149 [2018-10-22 15:47:40,556 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 15:47:40,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-22 15:47:40,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 142. [2018-10-22 15:47:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-22 15:47:40,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2018-10-22 15:47:40,581 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 137 [2018-10-22 15:47:40,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:40,581 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2018-10-22 15:47:40,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:47:40,581 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2018-10-22 15:47:40,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-22 15:47:40,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:40,582 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:40,582 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:40,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:40,582 INFO L82 PathProgramCache]: Analyzing trace with hash -692504173, now seen corresponding path program 43 times [2018-10-22 15:47:40,582 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:40,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:40,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:40,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:40,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:41,477 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 15:47:41,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:41,477 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 15:47:41,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:41,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:41,570 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 15:47:41,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:41,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-22 15:47:41,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-22 15:47:41,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-22 15:47:41,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=1751, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:47:41,591 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 49 states. [2018-10-22 15:47:42,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:42,837 INFO L93 Difference]: Finished difference Result 241 states and 243 transitions. [2018-10-22 15:47:42,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-22 15:47:42,837 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 141 [2018-10-22 15:47:42,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:42,838 INFO L225 Difference]: With dead ends: 241 [2018-10-22 15:47:42,838 INFO L226 Difference]: Without dead ends: 144 [2018-10-22 15:47:42,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1249, Invalid=4007, Unknown=0, NotChecked=0, Total=5256 [2018-10-22 15:47:42,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-22 15:47:42,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-10-22 15:47:42,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-22 15:47:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2018-10-22 15:47:42,863 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 141 [2018-10-22 15:47:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:42,863 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2018-10-22 15:47:42,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-22 15:47:42,863 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2018-10-22 15:47:42,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-22 15:47:42,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:42,864 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:42,864 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:42,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:42,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1355948595, now seen corresponding path program 44 times [2018-10-22 15:47:42,865 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:42,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:42,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:42,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:42,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:43,551 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 15:47:43,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:43,551 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 15:47:43,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:47:43,625 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:47:43,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:43,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:43,954 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 15:47:43,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:43,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-10-22 15:47:43,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:47:43,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:47:43,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:47:43,975 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 29 states. [2018-10-22 15:47:44,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:44,487 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-10-22 15:47:44,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-22 15:47:44,487 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 143 [2018-10-22 15:47:44,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:44,488 INFO L225 Difference]: With dead ends: 157 [2018-10-22 15:47:44,489 INFO L226 Difference]: Without dead ends: 155 [2018-10-22 15:47:44,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1057, Invalid=1805, Unknown=0, NotChecked=0, Total=2862 [2018-10-22 15:47:44,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-22 15:47:44,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 148. [2018-10-22 15:47:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-22 15:47:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2018-10-22 15:47:44,521 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 143 [2018-10-22 15:47:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:44,521 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2018-10-22 15:47:44,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:47:44,521 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2018-10-22 15:47:44,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-22 15:47:44,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:44,522 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:44,522 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:44,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:44,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1893305322, now seen corresponding path program 45 times [2018-10-22 15:47:44,522 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:44,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:44,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:44,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:44,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:46,783 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 15:47:46,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:46,783 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 15:47:46,792 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:47:46,869 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-22 15:47:46,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:46,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:46,903 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 15:47:46,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:46,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-22 15:47:46,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-22 15:47:46,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-22 15:47:46,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=1899, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 15:47:46,936 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 51 states. [2018-10-22 15:47:49,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:49,598 INFO L93 Difference]: Finished difference Result 251 states and 253 transitions. [2018-10-22 15:47:49,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-22 15:47:49,598 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 147 [2018-10-22 15:47:49,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:49,599 INFO L225 Difference]: With dead ends: 251 [2018-10-22 15:47:49,599 INFO L226 Difference]: Without dead ends: 150 [2018-10-22 15:47:49,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1351, Invalid=4349, Unknown=0, NotChecked=0, Total=5700 [2018-10-22 15:47:49,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-22 15:47:49,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-22 15:47:49,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-22 15:47:49,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2018-10-22 15:47:49,625 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 147 [2018-10-22 15:47:49,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:49,625 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2018-10-22 15:47:49,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-22 15:47:49,625 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2018-10-22 15:47:49,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-22 15:47:49,626 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:49,626 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:49,627 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:49,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:49,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1162246960, now seen corresponding path program 46 times [2018-10-22 15:47:49,627 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:49,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:49,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:49,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:49,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:50,056 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 15:47:50,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:50,057 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 15:47:50,064 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:47:50,126 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:47:50,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:50,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:50,217 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 15:47:50,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:50,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-10-22 15:47:50,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-22 15:47:50,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-22 15:47:50,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:47:50,239 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 30 states. [2018-10-22 15:47:50,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:50,801 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2018-10-22 15:47:50,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-22 15:47:50,802 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 149 [2018-10-22 15:47:50,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:50,803 INFO L225 Difference]: With dead ends: 163 [2018-10-22 15:47:50,803 INFO L226 Difference]: Without dead ends: 161 [2018-10-22 15:47:50,804 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 15:47:50,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-22 15:47:50,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 154. [2018-10-22 15:47:50,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-22 15:47:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2018-10-22 15:47:50,844 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 149 [2018-10-22 15:47:50,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:50,845 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2018-10-22 15:47:50,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-22 15:47:50,845 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2018-10-22 15:47:50,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-22 15:47:50,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:50,846 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:50,846 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:50,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:50,846 INFO L82 PathProgramCache]: Analyzing trace with hash 246473113, now seen corresponding path program 47 times [2018-10-22 15:47:50,847 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:50,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:50,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:50,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:50,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:52,568 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 15:47:52,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:52,568 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 15:47:52,577 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:47:52,662 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-22 15:47:52,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:52,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:52,696 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 15:47:52,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:52,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-22 15:47:52,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-22 15:47:52,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-22 15:47:52,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=2053, Unknown=0, NotChecked=0, Total=2756 [2018-10-22 15:47:52,717 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 53 states. [2018-10-22 15:47:54,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:54,352 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2018-10-22 15:47:54,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-22 15:47:54,352 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 153 [2018-10-22 15:47:54,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:54,353 INFO L225 Difference]: With dead ends: 261 [2018-10-22 15:47:54,353 INFO L226 Difference]: Without dead ends: 156 [2018-10-22 15:47:54,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1457, Invalid=4705, Unknown=0, NotChecked=0, Total=6162 [2018-10-22 15:47:54,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-22 15:47:54,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-22 15:47:54,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-22 15:47:54,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2018-10-22 15:47:54,391 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 153 [2018-10-22 15:47:54,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:54,391 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2018-10-22 15:47:54,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-22 15:47:54,391 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2018-10-22 15:47:54,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-22 15:47:54,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:54,392 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:54,392 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:54,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:54,393 INFO L82 PathProgramCache]: Analyzing trace with hash -755040557, now seen corresponding path program 48 times [2018-10-22 15:47:54,393 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:54,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:54,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:54,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:54,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:55,204 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 15:47:55,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:55,205 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 15:47:55,212 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:47:55,298 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-22 15:47:55,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:55,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:55,340 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 15:47:55,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:55,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-10-22 15:47:55,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:47:55,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:47:55,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:47:55,361 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand 31 states. [2018-10-22 15:47:55,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:55,921 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-10-22 15:47:55,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-22 15:47:55,921 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 155 [2018-10-22 15:47:55,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:55,922 INFO L225 Difference]: With dead ends: 169 [2018-10-22 15:47:55,922 INFO L226 Difference]: Without dead ends: 167 [2018-10-22 15:47:55,923 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 15:47:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-22 15:47:55,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2018-10-22 15:47:55,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-22 15:47:55,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2018-10-22 15:47:55,951 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 155 [2018-10-22 15:47:55,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:55,951 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2018-10-22 15:47:55,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:47:55,952 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2018-10-22 15:47:55,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-22 15:47:55,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:55,953 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:55,953 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:55,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:55,953 INFO L82 PathProgramCache]: Analyzing trace with hash 869507612, now seen corresponding path program 49 times [2018-10-22 15:47:55,953 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:55,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:55,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:55,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:47:55,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:57,149 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 15:47:57,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:57,149 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 15:47:57,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:57,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:57,271 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 15:47:57,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:57,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-22 15:47:57,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-22 15:47:57,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-22 15:47:57,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=2213, Unknown=0, NotChecked=0, Total=2970 [2018-10-22 15:47:57,299 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 55 states. [2018-10-22 15:47:58,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:47:58,842 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2018-10-22 15:47:58,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-22 15:47:58,843 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 159 [2018-10-22 15:47:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:47:58,844 INFO L225 Difference]: With dead ends: 271 [2018-10-22 15:47:58,844 INFO L226 Difference]: Without dead ends: 162 [2018-10-22 15:47:58,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1567, Invalid=5075, Unknown=0, NotChecked=0, Total=6642 [2018-10-22 15:47:58,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-22 15:47:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-22 15:47:58,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-22 15:47:58,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2018-10-22 15:47:58,874 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 159 [2018-10-22 15:47:58,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:47:58,875 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2018-10-22 15:47:58,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-22 15:47:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2018-10-22 15:47:58,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-22 15:47:58,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:47:58,876 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-22 15:47:58,876 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:47:58,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:47:58,876 INFO L82 PathProgramCache]: Analyzing trace with hash 377580502, now seen corresponding path program 50 times [2018-10-22 15:47:58,877 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:47:58,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:47:58,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:58,877 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:47:58,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:47:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:47:59,446 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 15:47:59,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:47:59,447 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 15:47:59,455 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:47:59,526 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:47:59,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:47:59,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:47:59,915 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 15:47:59,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:47:59,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-10-22 15:47:59,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-22 15:47:59,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-22 15:47:59,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:47:59,937 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 32 states. [2018-10-22 15:48:00,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:00,521 INFO L93 Difference]: Finished difference Result 175 states and 176 transitions. [2018-10-22 15:48:00,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-22 15:48:00,522 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 161 [2018-10-22 15:48:00,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:00,523 INFO L225 Difference]: With dead ends: 175 [2018-10-22 15:48:00,523 INFO L226 Difference]: Without dead ends: 173 [2018-10-22 15:48:00,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1309, Invalid=2231, Unknown=0, NotChecked=0, Total=3540 [2018-10-22 15:48:00,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-22 15:48:00,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 166. [2018-10-22 15:48:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-22 15:48:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2018-10-22 15:48:00,553 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 161 [2018-10-22 15:48:00,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:00,553 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2018-10-22 15:48:00,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-22 15:48:00,553 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2018-10-22 15:48:00,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-22 15:48:00,554 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:00,554 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:00,554 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:00,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:00,555 INFO L82 PathProgramCache]: Analyzing trace with hash -427698785, now seen corresponding path program 51 times [2018-10-22 15:48:00,555 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:00,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:00,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:00,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:00,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:01,804 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 15:48:01,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:01,804 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 15:48:01,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:48:01,901 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-22 15:48:01,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:01,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:01,942 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 15:48:01,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:01,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-22 15:48:01,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-22 15:48:01,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-22 15:48:01,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=813, Invalid=2379, Unknown=0, NotChecked=0, Total=3192 [2018-10-22 15:48:01,974 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 57 states. [2018-10-22 15:48:03,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:03,529 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2018-10-22 15:48:03,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-22 15:48:03,529 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 165 [2018-10-22 15:48:03,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:03,530 INFO L225 Difference]: With dead ends: 281 [2018-10-22 15:48:03,530 INFO L226 Difference]: Without dead ends: 168 [2018-10-22 15:48:03,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1681, Invalid=5459, Unknown=0, NotChecked=0, Total=7140 [2018-10-22 15:48:03,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-22 15:48:03,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-10-22 15:48:03,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-22 15:48:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2018-10-22 15:48:03,561 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 165 [2018-10-22 15:48:03,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:03,561 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2018-10-22 15:48:03,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-22 15:48:03,561 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2018-10-22 15:48:03,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-22 15:48:03,562 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:03,562 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:03,562 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:03,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:03,562 INFO L82 PathProgramCache]: Analyzing trace with hash -2026116135, now seen corresponding path program 52 times [2018-10-22 15:48:03,563 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:03,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:03,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:03,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:03,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:04,113 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 15:48:04,113 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:04,113 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 15:48:04,122 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:48:04,190 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:48:04,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:04,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:04,321 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 15:48:04,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:04,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-10-22 15:48:04,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:48:04,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:48:04,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:48:04,343 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand 33 states. [2018-10-22 15:48:04,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:04,980 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-10-22 15:48:04,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-22 15:48:04,980 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 167 [2018-10-22 15:48:04,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:04,981 INFO L225 Difference]: With dead ends: 181 [2018-10-22 15:48:04,981 INFO L226 Difference]: Without dead ends: 179 [2018-10-22 15:48:04,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1399, Invalid=2383, Unknown=0, NotChecked=0, Total=3782 [2018-10-22 15:48:04,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-22 15:48:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 172. [2018-10-22 15:48:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-22 15:48:05,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2018-10-22 15:48:05,027 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 167 [2018-10-22 15:48:05,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:05,027 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2018-10-22 15:48:05,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 15:48:05,028 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2018-10-22 15:48:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-22 15:48:05,028 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:05,029 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:05,029 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:05,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1982241826, now seen corresponding path program 53 times [2018-10-22 15:48:05,029 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:05,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:05,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:05,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:05,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:06,081 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 15:48:06,081 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:06,081 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 15:48:06,089 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:48:06,195 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-22 15:48:06,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:06,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:06,236 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 15:48:06,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:06,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-22 15:48:06,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-22 15:48:06,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-22 15:48:06,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2018-10-22 15:48:06,271 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand 59 states. [2018-10-22 15:48:08,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:08,048 INFO L93 Difference]: Finished difference Result 291 states and 293 transitions. [2018-10-22 15:48:08,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-22 15:48:08,049 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 171 [2018-10-22 15:48:08,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:08,049 INFO L225 Difference]: With dead ends: 291 [2018-10-22 15:48:08,050 INFO L226 Difference]: Without dead ends: 174 [2018-10-22 15:48:08,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1799, Invalid=5857, Unknown=0, NotChecked=0, Total=7656 [2018-10-22 15:48:08,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-22 15:48:08,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-10-22 15:48:08,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-10-22 15:48:08,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2018-10-22 15:48:08,083 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 171 [2018-10-22 15:48:08,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:08,083 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2018-10-22 15:48:08,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-22 15:48:08,084 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2018-10-22 15:48:08,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-22 15:48:08,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:08,084 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:08,085 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:08,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:08,085 INFO L82 PathProgramCache]: Analyzing trace with hash -392061220, now seen corresponding path program 54 times [2018-10-22 15:48:08,085 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:08,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:08,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:08,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:08,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:08,822 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 15:48:08,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:08,823 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 15:48:08,831 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:48:08,928 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-22 15:48:08,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:08,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:09,204 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 15:48:09,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:09,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-10-22 15:48:09,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-22 15:48:09,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-22 15:48:09,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:48:09,227 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 34 states. [2018-10-22 15:48:09,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:09,883 INFO L93 Difference]: Finished difference Result 187 states and 188 transitions. [2018-10-22 15:48:09,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-22 15:48:09,883 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 173 [2018-10-22 15:48:09,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:09,884 INFO L225 Difference]: With dead ends: 187 [2018-10-22 15:48:09,884 INFO L226 Difference]: Without dead ends: 185 [2018-10-22 15:48:09,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1492, Invalid=2540, Unknown=0, NotChecked=0, Total=4032 [2018-10-22 15:48:09,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-22 15:48:09,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 178. [2018-10-22 15:48:09,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-22 15:48:09,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2018-10-22 15:48:09,935 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 173 [2018-10-22 15:48:09,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:09,935 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2018-10-22 15:48:09,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-22 15:48:09,936 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2018-10-22 15:48:09,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-22 15:48:09,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:09,937 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:09,937 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:09,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:09,937 INFO L82 PathProgramCache]: Analyzing trace with hash 2007307685, now seen corresponding path program 55 times [2018-10-22 15:48:09,938 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:09,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:09,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:09,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:09,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:11,109 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 15:48:11,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:11,110 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 15:48:11,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:11,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:11,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:11,231 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 15:48:11,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:11,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-22 15:48:11,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-22 15:48:11,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-22 15:48:11,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=931, Invalid=2729, Unknown=0, NotChecked=0, Total=3660 [2018-10-22 15:48:11,262 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand 61 states. [2018-10-22 15:48:13,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:13,167 INFO L93 Difference]: Finished difference Result 301 states and 303 transitions. [2018-10-22 15:48:13,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-22 15:48:13,167 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 177 [2018-10-22 15:48:13,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:13,168 INFO L225 Difference]: With dead ends: 301 [2018-10-22 15:48:13,168 INFO L226 Difference]: Without dead ends: 180 [2018-10-22 15:48:13,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1921, Invalid=6269, Unknown=0, NotChecked=0, Total=8190 [2018-10-22 15:48:13,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-22 15:48:13,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2018-10-22 15:48:13,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-10-22 15:48:13,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2018-10-22 15:48:13,209 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 177 [2018-10-22 15:48:13,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:13,210 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2018-10-22 15:48:13,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-22 15:48:13,210 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2018-10-22 15:48:13,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-22 15:48:13,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:13,211 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:13,211 INFO L424 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:13,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:13,211 INFO L82 PathProgramCache]: Analyzing trace with hash 496870623, now seen corresponding path program 56 times [2018-10-22 15:48:13,212 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:13,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:13,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:13,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:13,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:14,059 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 15:48:14,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:14,059 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 15:48:14,067 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:48:14,135 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:48:14,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:14,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:14,198 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 15:48:14,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:14,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-10-22 15:48:14,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:48:14,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:48:14,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:48:14,228 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 35 states. [2018-10-22 15:48:14,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:14,978 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2018-10-22 15:48:14,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-22 15:48:14,978 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 179 [2018-10-22 15:48:14,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:14,979 INFO L225 Difference]: With dead ends: 193 [2018-10-22 15:48:14,979 INFO L226 Difference]: Without dead ends: 191 [2018-10-22 15:48:14,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1588, Invalid=2702, Unknown=0, NotChecked=0, Total=4290 [2018-10-22 15:48:14,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-22 15:48:15,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2018-10-22 15:48:15,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-22 15:48:15,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2018-10-22 15:48:15,019 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 179 [2018-10-22 15:48:15,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:15,019 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2018-10-22 15:48:15,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:48:15,019 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2018-10-22 15:48:15,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-22 15:48:15,020 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:15,020 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:15,021 INFO L424 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:15,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:15,021 INFO L82 PathProgramCache]: Analyzing trace with hash 592994856, now seen corresponding path program 57 times [2018-10-22 15:48:15,021 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:15,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:15,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:15,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:15,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:16,219 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 15:48:16,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:16,219 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 15:48:16,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:48:16,342 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-22 15:48:16,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:16,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:16,389 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 15:48:16,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:16,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-22 15:48:16,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-22 15:48:16,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-22 15:48:16,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=993, Invalid=2913, Unknown=0, NotChecked=0, Total=3906 [2018-10-22 15:48:16,419 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 63 states. [2018-10-22 15:48:18,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:18,626 INFO L93 Difference]: Finished difference Result 311 states and 313 transitions. [2018-10-22 15:48:18,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-22 15:48:18,626 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 183 [2018-10-22 15:48:18,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:18,628 INFO L225 Difference]: With dead ends: 311 [2018-10-22 15:48:18,628 INFO L226 Difference]: Without dead ends: 186 [2018-10-22 15:48:18,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2047, Invalid=6695, Unknown=0, NotChecked=0, Total=8742 [2018-10-22 15:48:18,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-22 15:48:18,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-10-22 15:48:18,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-10-22 15:48:18,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2018-10-22 15:48:18,672 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 183 [2018-10-22 15:48:18,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:18,673 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2018-10-22 15:48:18,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-22 15:48:18,673 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2018-10-22 15:48:18,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-10-22 15:48:18,673 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:18,674 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:18,674 INFO L424 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:18,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:18,674 INFO L82 PathProgramCache]: Analyzing trace with hash 110304738, now seen corresponding path program 58 times [2018-10-22 15:48:18,674 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:18,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:18,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:18,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:18,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:19,383 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 15:48:19,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:19,384 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 15:48:19,391 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:48:19,469 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:48:19,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:19,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:19,570 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 15:48:19,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:19,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-10-22 15:48:19,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-22 15:48:19,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-22 15:48:19,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:48:19,592 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 36 states. [2018-10-22 15:48:20,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:20,301 INFO L93 Difference]: Finished difference Result 199 states and 200 transitions. [2018-10-22 15:48:20,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-22 15:48:20,302 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 185 [2018-10-22 15:48:20,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:20,303 INFO L225 Difference]: With dead ends: 199 [2018-10-22 15:48:20,303 INFO L226 Difference]: Without dead ends: 197 [2018-10-22 15:48:20,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1687, Invalid=2869, Unknown=0, NotChecked=0, Total=4556 [2018-10-22 15:48:20,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-22 15:48:20,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2018-10-22 15:48:20,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-10-22 15:48:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2018-10-22 15:48:20,341 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 185 [2018-10-22 15:48:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:20,342 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2018-10-22 15:48:20,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-22 15:48:20,342 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2018-10-22 15:48:20,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-10-22 15:48:20,343 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:20,343 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:20,343 INFO L424 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:20,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:20,344 INFO L82 PathProgramCache]: Analyzing trace with hash 856924587, now seen corresponding path program 59 times [2018-10-22 15:48:20,344 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:20,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:20,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:20,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:20,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:21,582 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 15:48:21,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:21,582 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 15:48:21,590 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:48:21,697 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-22 15:48:21,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:21,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:21,742 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 15:48:21,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:21,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-22 15:48:21,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-22 15:48:21,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-22 15:48:21,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=3103, Unknown=0, NotChecked=0, Total=4160 [2018-10-22 15:48:21,763 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 65 states. [2018-10-22 15:48:24,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:24,097 INFO L93 Difference]: Finished difference Result 321 states and 323 transitions. [2018-10-22 15:48:24,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-22 15:48:24,097 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 189 [2018-10-22 15:48:24,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:24,098 INFO L225 Difference]: With dead ends: 321 [2018-10-22 15:48:24,098 INFO L226 Difference]: Without dead ends: 192 [2018-10-22 15:48:24,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2177, Invalid=7135, Unknown=0, NotChecked=0, Total=9312 [2018-10-22 15:48:24,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-10-22 15:48:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-10-22 15:48:24,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-22 15:48:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2018-10-22 15:48:24,146 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2018-10-22 15:48:24,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:24,146 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2018-10-22 15:48:24,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-22 15:48:24,146 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2018-10-22 15:48:24,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-22 15:48:24,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:24,147 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:24,147 INFO L424 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:24,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:24,147 INFO L82 PathProgramCache]: Analyzing trace with hash -547542555, now seen corresponding path program 60 times [2018-10-22 15:48:24,147 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:24,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:24,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:24,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:24,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:24,736 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 15:48:24,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:24,736 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 15:48:24,745 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:48:24,866 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-22 15:48:24,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:24,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:24,940 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 15:48:24,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:24,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-10-22 15:48:24,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:48:24,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:48:24,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:48:24,961 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand 37 states. [2018-10-22 15:48:25,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:25,708 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2018-10-22 15:48:25,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-22 15:48:25,709 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 191 [2018-10-22 15:48:25,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:25,711 INFO L225 Difference]: With dead ends: 205 [2018-10-22 15:48:25,711 INFO L226 Difference]: Without dead ends: 203 [2018-10-22 15:48:25,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1789, Invalid=3041, Unknown=0, NotChecked=0, Total=4830 [2018-10-22 15:48:25,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-22 15:48:25,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 196. [2018-10-22 15:48:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-22 15:48:25,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2018-10-22 15:48:25,759 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 191 [2018-10-22 15:48:25,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:25,759 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2018-10-22 15:48:25,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:48:25,760 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2018-10-22 15:48:25,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-22 15:48:25,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:25,761 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:25,761 INFO L424 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:25,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:25,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1075967022, now seen corresponding path program 61 times [2018-10-22 15:48:25,761 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:25,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:25,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:25,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:25,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:27,050 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 15:48:27,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:27,050 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 15:48:27,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:27,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:27,174 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 15:48:27,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:27,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-22 15:48:27,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-22 15:48:27,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-22 15:48:27,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1123, Invalid=3299, Unknown=0, NotChecked=0, Total=4422 [2018-10-22 15:48:27,196 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand 67 states. [2018-10-22 15:48:29,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:29,675 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2018-10-22 15:48:29,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-22 15:48:29,675 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 195 [2018-10-22 15:48:29,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:29,676 INFO L225 Difference]: With dead ends: 331 [2018-10-22 15:48:29,676 INFO L226 Difference]: Without dead ends: 198 [2018-10-22 15:48:29,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2311, Invalid=7589, Unknown=0, NotChecked=0, Total=9900 [2018-10-22 15:48:29,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-10-22 15:48:29,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-10-22 15:48:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-10-22 15:48:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2018-10-22 15:48:29,723 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 195 [2018-10-22 15:48:29,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:29,723 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2018-10-22 15:48:29,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-22 15:48:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2018-10-22 15:48:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-22 15:48:29,724 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:29,724 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:29,725 INFO L424 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:29,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:29,725 INFO L82 PathProgramCache]: Analyzing trace with hash 491710696, now seen corresponding path program 62 times [2018-10-22 15:48:29,725 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:29,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:29,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:29,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:29,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:30,356 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 15:48:30,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:30,356 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 15:48:30,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:48:30,459 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:48:30,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:30,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:30,606 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 15:48:30,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:30,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-10-22 15:48:30,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-22 15:48:30,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-22 15:48:30,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:48:30,628 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 38 states. [2018-10-22 15:48:31,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:31,428 INFO L93 Difference]: Finished difference Result 211 states and 212 transitions. [2018-10-22 15:48:31,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-22 15:48:31,429 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 197 [2018-10-22 15:48:31,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:31,430 INFO L225 Difference]: With dead ends: 211 [2018-10-22 15:48:31,430 INFO L226 Difference]: Without dead ends: 209 [2018-10-22 15:48:31,431 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 15:48:31,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-22 15:48:31,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 202. [2018-10-22 15:48:31,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-10-22 15:48:31,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2018-10-22 15:48:31,474 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 197 [2018-10-22 15:48:31,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:31,475 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2018-10-22 15:48:31,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-22 15:48:31,475 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2018-10-22 15:48:31,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-10-22 15:48:31,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:31,476 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:31,476 INFO L424 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:31,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:31,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1589216847, now seen corresponding path program 63 times [2018-10-22 15:48:31,477 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:31,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:31,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:31,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:31,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:32,881 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 15:48:32,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:32,882 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 15:48:32,889 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:48:33,015 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-22 15:48:33,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:33,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:33,065 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 15:48:33,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:33,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-22 15:48:33,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-22 15:48:33,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-22 15:48:33,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1191, Invalid=3501, Unknown=0, NotChecked=0, Total=4692 [2018-10-22 15:48:33,087 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 69 states. [2018-10-22 15:48:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:35,827 INFO L93 Difference]: Finished difference Result 341 states and 343 transitions. [2018-10-22 15:48:35,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-22 15:48:35,827 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 201 [2018-10-22 15:48:35,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:35,828 INFO L225 Difference]: With dead ends: 341 [2018-10-22 15:48:35,828 INFO L226 Difference]: Without dead ends: 204 [2018-10-22 15:48:35,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2449, Invalid=8057, Unknown=0, NotChecked=0, Total=10506 [2018-10-22 15:48:35,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-22 15:48:35,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2018-10-22 15:48:35,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-10-22 15:48:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2018-10-22 15:48:35,872 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 201 [2018-10-22 15:48:35,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:35,872 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2018-10-22 15:48:35,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-22 15:48:35,873 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2018-10-22 15:48:35,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-22 15:48:35,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:35,874 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:35,874 INFO L424 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:35,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:35,874 INFO L82 PathProgramCache]: Analyzing trace with hash -852264213, now seen corresponding path program 64 times [2018-10-22 15:48:35,874 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:35,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:35,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:35,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:35,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:36,484 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 15:48:36,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:36,484 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 15:48:36,491 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:48:36,580 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:48:36,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:36,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:36,674 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 15:48:36,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:36,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-10-22 15:48:36,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-22 15:48:36,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-22 15:48:36,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:48:36,696 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 39 states. [2018-10-22 15:48:37,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:37,566 INFO L93 Difference]: Finished difference Result 217 states and 218 transitions. [2018-10-22 15:48:37,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-22 15:48:37,566 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 203 [2018-10-22 15:48:37,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:37,567 INFO L225 Difference]: With dead ends: 217 [2018-10-22 15:48:37,567 INFO L226 Difference]: Without dead ends: 215 [2018-10-22 15:48:37,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2002, Invalid=3400, Unknown=0, NotChecked=0, Total=5402 [2018-10-22 15:48:37,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-10-22 15:48:37,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 208. [2018-10-22 15:48:37,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-22 15:48:37,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2018-10-22 15:48:37,621 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 203 [2018-10-22 15:48:37,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:37,621 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2018-10-22 15:48:37,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-22 15:48:37,621 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2018-10-22 15:48:37,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-22 15:48:37,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:37,622 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:37,622 INFO L424 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:37,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:37,623 INFO L82 PathProgramCache]: Analyzing trace with hash -927182284, now seen corresponding path program 65 times [2018-10-22 15:48:37,623 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:37,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:37,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:37,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:37,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:39,231 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 15:48:39,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:39,232 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 15:48:39,239 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:48:39,365 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-22 15:48:39,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:39,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:39,414 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 15:48:39,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:39,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-22 15:48:39,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-22 15:48:39,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-22 15:48:39,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1261, Invalid=3709, Unknown=0, NotChecked=0, Total=4970 [2018-10-22 15:48:39,435 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand 71 states. [2018-10-22 15:48:42,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:42,029 INFO L93 Difference]: Finished difference Result 351 states and 353 transitions. [2018-10-22 15:48:42,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-22 15:48:42,029 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 207 [2018-10-22 15:48:42,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:42,030 INFO L225 Difference]: With dead ends: 351 [2018-10-22 15:48:42,030 INFO L226 Difference]: Without dead ends: 210 [2018-10-22 15:48:42,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2591, Invalid=8539, Unknown=0, NotChecked=0, Total=11130 [2018-10-22 15:48:42,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-10-22 15:48:42,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-10-22 15:48:42,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-10-22 15:48:42,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2018-10-22 15:48:42,086 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 207 [2018-10-22 15:48:42,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:42,086 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2018-10-22 15:48:42,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-22 15:48:42,086 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2018-10-22 15:48:42,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-22 15:48:42,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:42,087 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:42,087 INFO L424 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:42,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:42,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1900937198, now seen corresponding path program 66 times [2018-10-22 15:48:42,088 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:42,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:42,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:42,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:42,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:42,682 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 15:48:42,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:42,682 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 15:48:42,690 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:48:42,814 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-10-22 15:48:42,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:42,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:43,091 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 15:48:43,111 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:43,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-10-22 15:48:43,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:48:43,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:48:43,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:48:43,112 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand 40 states. [2018-10-22 15:48:43,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:43,970 INFO L93 Difference]: Finished difference Result 223 states and 224 transitions. [2018-10-22 15:48:43,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-22 15:48:43,971 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 209 [2018-10-22 15:48:43,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:43,971 INFO L225 Difference]: With dead ends: 223 [2018-10-22 15:48:43,972 INFO L226 Difference]: Without dead ends: 221 [2018-10-22 15:48:43,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2113, Invalid=3587, Unknown=0, NotChecked=0, Total=5700 [2018-10-22 15:48:43,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-22 15:48:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 214. [2018-10-22 15:48:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-10-22 15:48:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2018-10-22 15:48:44,031 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 209 [2018-10-22 15:48:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:44,032 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2018-10-22 15:48:44,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:48:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2018-10-22 15:48:44,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-22 15:48:44,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:44,033 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:44,033 INFO L424 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:44,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:44,034 INFO L82 PathProgramCache]: Analyzing trace with hash 574004663, now seen corresponding path program 67 times [2018-10-22 15:48:44,034 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:44,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:44,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:44,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:44,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:45,793 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 15:48:45,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:45,794 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 15:48:45,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:45,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:45,930 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 15:48:45,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:45,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-22 15:48:45,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-22 15:48:45,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-22 15:48:45,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=3923, Unknown=0, NotChecked=0, Total=5256 [2018-10-22 15:48:45,951 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 73 states. [2018-10-22 15:48:48,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:48,640 INFO L93 Difference]: Finished difference Result 361 states and 363 transitions. [2018-10-22 15:48:48,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-22 15:48:48,641 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 213 [2018-10-22 15:48:48,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:48,642 INFO L225 Difference]: With dead ends: 361 [2018-10-22 15:48:48,642 INFO L226 Difference]: Without dead ends: 216 [2018-10-22 15:48:48,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2737, Invalid=9035, Unknown=0, NotChecked=0, Total=11772 [2018-10-22 15:48:48,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-10-22 15:48:48,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-10-22 15:48:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-10-22 15:48:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2018-10-22 15:48:48,692 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 213 [2018-10-22 15:48:48,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:48,692 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2018-10-22 15:48:48,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-22 15:48:48,692 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2018-10-22 15:48:48,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-10-22 15:48:48,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:48,693 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:48,693 INFO L424 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:48,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:48,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1599707121, now seen corresponding path program 68 times [2018-10-22 15:48:48,694 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:48,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:48,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:48,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:48:48,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:49,460 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 15:48:49,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:49,461 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 15:48:49,467 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:48:49,554 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:48:49,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:49,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:49,765 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 15:48:49,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:49,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-10-22 15:48:49,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:48:49,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:48:49,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:48:49,788 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand 41 states. [2018-10-22 15:48:50,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:50,682 INFO L93 Difference]: Finished difference Result 229 states and 230 transitions. [2018-10-22 15:48:50,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-22 15:48:50,682 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 215 [2018-10-22 15:48:50,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:50,683 INFO L225 Difference]: With dead ends: 229 [2018-10-22 15:48:50,684 INFO L226 Difference]: Without dead ends: 227 [2018-10-22 15:48:50,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2227, Invalid=3779, Unknown=0, NotChecked=0, Total=6006 [2018-10-22 15:48:50,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-22 15:48:50,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2018-10-22 15:48:50,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-22 15:48:50,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2018-10-22 15:48:50,737 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 215 [2018-10-22 15:48:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:50,737 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2018-10-22 15:48:50,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 15:48:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2018-10-22 15:48:50,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-22 15:48:50,738 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:50,738 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:50,738 INFO L424 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:50,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:50,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1893760058, now seen corresponding path program 69 times [2018-10-22 15:48:50,739 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:50,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:50,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:50,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:50,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:50,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:52,344 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 15:48:52,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:52,344 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 15:48:52,352 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:48:52,483 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-22 15:48:52,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:52,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:52,536 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 15:48:52,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:52,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-22 15:48:52,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-22 15:48:52,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-22 15:48:52,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1407, Invalid=4143, Unknown=0, NotChecked=0, Total=5550 [2018-10-22 15:48:52,558 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand 75 states. [2018-10-22 15:48:55,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:55,559 INFO L93 Difference]: Finished difference Result 371 states and 373 transitions. [2018-10-22 15:48:55,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-22 15:48:55,559 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 219 [2018-10-22 15:48:55,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:55,560 INFO L225 Difference]: With dead ends: 371 [2018-10-22 15:48:55,560 INFO L226 Difference]: Without dead ends: 222 [2018-10-22 15:48:55,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1925 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2887, Invalid=9545, Unknown=0, NotChecked=0, Total=12432 [2018-10-22 15:48:55,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-22 15:48:55,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2018-10-22 15:48:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-10-22 15:48:55,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2018-10-22 15:48:55,612 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 219 [2018-10-22 15:48:55,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:55,613 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2018-10-22 15:48:55,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-22 15:48:55,613 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2018-10-22 15:48:55,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-22 15:48:55,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:55,614 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:55,614 INFO L424 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:55,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:55,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1635163404, now seen corresponding path program 70 times [2018-10-22 15:48:55,614 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:55,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:55,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:55,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:55,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:56,284 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 15:48:56,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:56,285 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 15:48:56,292 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:48:56,390 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:48:56,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:56,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:56,485 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 15:48:56,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:56,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-10-22 15:48:56,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-22 15:48:56,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-22 15:48:56,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:48:56,507 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 42 states. [2018-10-22 15:48:57,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:48:57,614 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2018-10-22 15:48:57,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-22 15:48:57,615 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 221 [2018-10-22 15:48:57,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:48:57,616 INFO L225 Difference]: With dead ends: 235 [2018-10-22 15:48:57,616 INFO L226 Difference]: Without dead ends: 233 [2018-10-22 15:48:57,616 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 15:48:57,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-10-22 15:48:57,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2018-10-22 15:48:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-10-22 15:48:57,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2018-10-22 15:48:57,671 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 221 [2018-10-22 15:48:57,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:48:57,671 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2018-10-22 15:48:57,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-22 15:48:57,672 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2018-10-22 15:48:57,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-10-22 15:48:57,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:48:57,672 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-10-22 15:48:57,673 INFO L424 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:48:57,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:48:57,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1386410563, now seen corresponding path program 71 times [2018-10-22 15:48:57,673 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:48:57,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:48:57,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:57,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:48:57,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:48:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:48:59,375 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 15:48:59,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:48:59,376 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 15:48:59,382 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:48:59,525 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-22 15:48:59,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:48:59,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:48:59,576 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 15:48:59,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:48:59,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-22 15:48:59,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-22 15:48:59,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-22 15:48:59,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=4369, Unknown=0, NotChecked=0, Total=5852 [2018-10-22 15:48:59,599 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand 77 states. [2018-10-22 15:49:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:01,951 INFO L93 Difference]: Finished difference Result 381 states and 383 transitions. [2018-10-22 15:49:01,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-22 15:49:01,952 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 225 [2018-10-22 15:49:01,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:01,952 INFO L225 Difference]: With dead ends: 381 [2018-10-22 15:49:01,952 INFO L226 Difference]: Without dead ends: 228 [2018-10-22 15:49:01,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3041, Invalid=10069, Unknown=0, NotChecked=0, Total=13110 [2018-10-22 15:49:01,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-22 15:49:02,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-10-22 15:49:02,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-10-22 15:49:02,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 229 transitions. [2018-10-22 15:49:02,012 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 229 transitions. Word has length 225 [2018-10-22 15:49:02,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:02,012 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 229 transitions. [2018-10-22 15:49:02,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-22 15:49:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 229 transitions. [2018-10-22 15:49:02,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-10-22 15:49:02,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:02,013 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:02,013 INFO L424 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:02,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:02,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1166573815, now seen corresponding path program 72 times [2018-10-22 15:49:02,014 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:02,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:02,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:02,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:02,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:02,752 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 15:49:02,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:02,752 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:49:02,759 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:49:02,908 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-22 15:49:02,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:02,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:02,998 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 15:49:03,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:03,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-10-22 15:49:03,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-22 15:49:03,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-22 15:49:03,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:49:03,019 INFO L87 Difference]: Start difference. First operand 228 states and 229 transitions. Second operand 43 states. [2018-10-22 15:49:03,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:03,978 INFO L93 Difference]: Finished difference Result 241 states and 242 transitions. [2018-10-22 15:49:03,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-22 15:49:03,978 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 227 [2018-10-22 15:49:03,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:03,979 INFO L225 Difference]: With dead ends: 241 [2018-10-22 15:49:03,979 INFO L226 Difference]: Without dead ends: 239 [2018-10-22 15:49:03,980 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 15:49:03,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-22 15:49:04,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 232. [2018-10-22 15:49:04,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-22 15:49:04,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2018-10-22 15:49:04,039 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 227 [2018-10-22 15:49:04,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:04,039 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2018-10-22 15:49:04,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-22 15:49:04,039 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2018-10-22 15:49:04,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-22 15:49:04,040 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:04,040 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:04,040 INFO L424 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:04,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:04,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1674015296, now seen corresponding path program 73 times [2018-10-22 15:49:04,041 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:04,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:04,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:04,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:04,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:06,095 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 15:49:06,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:06,095 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 15:49:06,103 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:06,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:06,249 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 15:49:06,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:06,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-22 15:49:06,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-22 15:49:06,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-22 15:49:06,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1561, Invalid=4601, Unknown=0, NotChecked=0, Total=6162 [2018-10-22 15:49:06,270 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand 79 states. [2018-10-22 15:49:09,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:09,442 INFO L93 Difference]: Finished difference Result 391 states and 393 transitions. [2018-10-22 15:49:09,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-22 15:49:09,442 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 231 [2018-10-22 15:49:09,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:09,443 INFO L225 Difference]: With dead ends: 391 [2018-10-22 15:49:09,443 INFO L226 Difference]: Without dead ends: 234 [2018-10-22 15:49:09,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3199, Invalid=10607, Unknown=0, NotChecked=0, Total=13806 [2018-10-22 15:49:09,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-22 15:49:09,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2018-10-22 15:49:09,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-10-22 15:49:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2018-10-22 15:49:09,510 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 231 [2018-10-22 15:49:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:09,510 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2018-10-22 15:49:09,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-22 15:49:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2018-10-22 15:49:09,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-10-22 15:49:09,511 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:09,511 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:09,511 INFO L424 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:09,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:09,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1484395002, now seen corresponding path program 74 times [2018-10-22 15:49:09,511 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:09,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:09,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:09,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:09,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:10,610 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 15:49:10,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:10,611 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 15:49:10,618 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:49:10,714 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:49:10,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:10,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:10,804 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 15:49:10,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:10,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-10-22 15:49:10,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-22 15:49:10,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-22 15:49:10,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:49:10,826 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 44 states. [2018-10-22 15:49:11,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:11,865 INFO L93 Difference]: Finished difference Result 247 states and 248 transitions. [2018-10-22 15:49:11,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-22 15:49:11,866 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 233 [2018-10-22 15:49:11,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:11,867 INFO L225 Difference]: With dead ends: 247 [2018-10-22 15:49:11,867 INFO L226 Difference]: Without dead ends: 245 [2018-10-22 15:49:11,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2587, Invalid=4385, Unknown=0, NotChecked=0, Total=6972 [2018-10-22 15:49:11,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-10-22 15:49:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 238. [2018-10-22 15:49:11,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-10-22 15:49:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 239 transitions. [2018-10-22 15:49:11,930 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 239 transitions. Word has length 233 [2018-10-22 15:49:11,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:11,931 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 239 transitions. [2018-10-22 15:49:11,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-22 15:49:11,931 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 239 transitions. [2018-10-22 15:49:11,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-10-22 15:49:11,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:11,932 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:11,932 INFO L424 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:11,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:11,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1850553917, now seen corresponding path program 75 times [2018-10-22 15:49:11,932 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:11,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:11,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:11,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:11,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:14,006 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 15:49:14,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:14,007 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 15:49:14,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:49:14,170 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-22 15:49:14,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:14,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:14,223 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 15:49:14,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:14,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-22 15:49:14,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-22 15:49:14,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-22 15:49:14,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1641, Invalid=4839, Unknown=0, NotChecked=0, Total=6480 [2018-10-22 15:49:14,245 INFO L87 Difference]: Start difference. First operand 238 states and 239 transitions. Second operand 81 states. [2018-10-22 15:49:16,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:16,977 INFO L93 Difference]: Finished difference Result 401 states and 403 transitions. [2018-10-22 15:49:16,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-22 15:49:16,978 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 237 [2018-10-22 15:49:16,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:16,978 INFO L225 Difference]: With dead ends: 401 [2018-10-22 15:49:16,979 INFO L226 Difference]: Without dead ends: 240 [2018-10-22 15:49:16,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3361, Invalid=11159, Unknown=0, NotChecked=0, Total=14520 [2018-10-22 15:49:16,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-10-22 15:49:17,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2018-10-22 15:49:17,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-10-22 15:49:17,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2018-10-22 15:49:17,042 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 237 [2018-10-22 15:49:17,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:17,042 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2018-10-22 15:49:17,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-22 15:49:17,042 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2018-10-22 15:49:17,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-10-22 15:49:17,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:17,043 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 38, 38, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:17,043 INFO L424 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:17,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:17,044 INFO L82 PathProgramCache]: Analyzing trace with hash 653866493, now seen corresponding path program 76 times [2018-10-22 15:49:17,044 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:17,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:17,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:17,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:17,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:17,802 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 15:49:17,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:17,803 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 15:49:17,810 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:49:17,912 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:49:17,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:17,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:17,998 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 15:49:18,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:18,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-10-22 15:49:18,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-22 15:49:18,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-22 15:49:18,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:49:18,020 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand 45 states. [2018-10-22 15:49:19,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:19,142 INFO L93 Difference]: Finished difference Result 253 states and 254 transitions. [2018-10-22 15:49:19,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-22 15:49:19,142 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 239 [2018-10-22 15:49:19,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:19,143 INFO L225 Difference]: With dead ends: 253 [2018-10-22 15:49:19,143 INFO L226 Difference]: Without dead ends: 251 [2018-10-22 15:49:19,144 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 15:49:19,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-10-22 15:49:19,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 244. [2018-10-22 15:49:19,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-22 15:49:19,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2018-10-22 15:49:19,209 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 239 [2018-10-22 15:49:19,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:19,209 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2018-10-22 15:49:19,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-22 15:49:19,209 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2018-10-22 15:49:19,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-22 15:49:19,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:19,210 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:19,210 INFO L424 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:19,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:19,210 INFO L82 PathProgramCache]: Analyzing trace with hash 69874758, now seen corresponding path program 77 times [2018-10-22 15:49:19,210 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:19,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:19,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:19,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:19,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:21,285 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 15:49:21,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:21,285 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 15:49:21,292 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:49:21,450 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-22 15:49:21,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:21,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:21,504 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 15:49:21,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:21,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-22 15:49:21,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-22 15:49:21,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-22 15:49:21,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1723, Invalid=5083, Unknown=0, NotChecked=0, Total=6806 [2018-10-22 15:49:21,526 INFO L87 Difference]: Start difference. First operand 244 states and 245 transitions. Second operand 83 states. [2018-10-22 15:49:24,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:24,211 INFO L93 Difference]: Finished difference Result 411 states and 413 transitions. [2018-10-22 15:49:24,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-22 15:49:24,211 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 243 [2018-10-22 15:49:24,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:24,212 INFO L225 Difference]: With dead ends: 411 [2018-10-22 15:49:24,213 INFO L226 Difference]: Without dead ends: 246 [2018-10-22 15:49:24,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2379 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3527, Invalid=11725, Unknown=0, NotChecked=0, Total=15252 [2018-10-22 15:49:24,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-22 15:49:24,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-10-22 15:49:24,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-10-22 15:49:24,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2018-10-22 15:49:24,277 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 243 [2018-10-22 15:49:24,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:24,277 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2018-10-22 15:49:24,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-22 15:49:24,278 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2018-10-22 15:49:24,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-10-22 15:49:24,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:24,278 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 39, 39, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:24,279 INFO L424 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:24,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:24,279 INFO L82 PathProgramCache]: Analyzing trace with hash 706284800, now seen corresponding path program 78 times [2018-10-22 15:49:24,279 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:24,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:24,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:24,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:24,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:25,796 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 15:49:25,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:25,797 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 15:49:25,804 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:49:25,959 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-10-22 15:49:25,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:25,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:26,057 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 15:49:26,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:26,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-10-22 15:49:26,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-22 15:49:26,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-22 15:49:26,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:49:26,080 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand 46 states. [2018-10-22 15:49:27,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:27,230 INFO L93 Difference]: Finished difference Result 259 states and 260 transitions. [2018-10-22 15:49:27,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-22 15:49:27,231 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 245 [2018-10-22 15:49:27,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:27,232 INFO L225 Difference]: With dead ends: 259 [2018-10-22 15:49:27,232 INFO L226 Difference]: Without dead ends: 257 [2018-10-22 15:49:27,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2842, Invalid=4814, Unknown=0, NotChecked=0, Total=7656 [2018-10-22 15:49:27,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-10-22 15:49:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2018-10-22 15:49:27,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-10-22 15:49:27,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2018-10-22 15:49:27,299 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 245 [2018-10-22 15:49:27,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:27,299 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2018-10-22 15:49:27,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-22 15:49:27,300 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2018-10-22 15:49:27,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-10-22 15:49:27,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:27,300 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:27,301 INFO L424 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:27,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:27,301 INFO L82 PathProgramCache]: Analyzing trace with hash 900780489, now seen corresponding path program 79 times [2018-10-22 15:49:27,301 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:27,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:27,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:27,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:27,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:29,454 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 15:49:29,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:29,455 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 15:49:29,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:29,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:29,647 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 15:49:29,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:29,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-22 15:49:29,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-22 15:49:29,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-22 15:49:29,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1807, Invalid=5333, Unknown=0, NotChecked=0, Total=7140 [2018-10-22 15:49:29,678 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand 85 states. [2018-10-22 15:49:32,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:32,169 INFO L93 Difference]: Finished difference Result 421 states and 423 transitions. [2018-10-22 15:49:32,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-22 15:49:32,169 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 249 [2018-10-22 15:49:32,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:32,170 INFO L225 Difference]: With dead ends: 421 [2018-10-22 15:49:32,170 INFO L226 Difference]: Without dead ends: 252 [2018-10-22 15:49:32,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2500 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3697, Invalid=12305, Unknown=0, NotChecked=0, Total=16002 [2018-10-22 15:49:32,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-10-22 15:49:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2018-10-22 15:49:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-10-22 15:49:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2018-10-22 15:49:32,238 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 249 [2018-10-22 15:49:32,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:32,238 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2018-10-22 15:49:32,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-22 15:49:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2018-10-22 15:49:32,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-10-22 15:49:32,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:32,240 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 40, 40, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:32,240 INFO L424 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:32,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:32,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1650767619, now seen corresponding path program 80 times [2018-10-22 15:49:32,240 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:32,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:32,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:32,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:32,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:33,125 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 15:49:33,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:33,126 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 15:49:33,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:49:33,237 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:49:33,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:33,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:33,345 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 15:49:33,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:33,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-10-22 15:49:33,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-22 15:49:33,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-22 15:49:33,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:49:33,368 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand 47 states. [2018-10-22 15:49:34,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:34,508 INFO L93 Difference]: Finished difference Result 265 states and 266 transitions. [2018-10-22 15:49:34,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-22 15:49:34,508 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 251 [2018-10-22 15:49:34,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:34,509 INFO L225 Difference]: With dead ends: 265 [2018-10-22 15:49:34,509 INFO L226 Difference]: Without dead ends: 263 [2018-10-22 15:49:34,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2974, Invalid=5036, Unknown=0, NotChecked=0, Total=8010 [2018-10-22 15:49:34,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-10-22 15:49:34,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 256. [2018-10-22 15:49:34,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-22 15:49:34,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 257 transitions. [2018-10-22 15:49:34,577 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 257 transitions. Word has length 251 [2018-10-22 15:49:34,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:34,578 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 257 transitions. [2018-10-22 15:49:34,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-22 15:49:34,578 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 257 transitions. [2018-10-22 15:49:34,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-22 15:49:34,579 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:34,579 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:34,579 INFO L424 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:34,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:34,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1404976564, now seen corresponding path program 81 times [2018-10-22 15:49:34,579 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:34,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:34,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:34,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:34,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:36,902 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 15:49:36,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:36,903 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 15:49:36,912 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:49:37,090 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-22 15:49:37,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:37,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:37,152 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 15:49:37,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:37,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-22 15:49:37,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-22 15:49:37,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-22 15:49:37,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=5589, Unknown=0, NotChecked=0, Total=7482 [2018-10-22 15:49:37,175 INFO L87 Difference]: Start difference. First operand 256 states and 257 transitions. Second operand 87 states. [2018-10-22 15:49:39,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:39,220 INFO L93 Difference]: Finished difference Result 431 states and 433 transitions. [2018-10-22 15:49:39,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-22 15:49:39,220 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 255 [2018-10-22 15:49:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:39,221 INFO L225 Difference]: With dead ends: 431 [2018-10-22 15:49:39,221 INFO L226 Difference]: Without dead ends: 258 [2018-10-22 15:49:39,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3871, Invalid=12899, Unknown=0, NotChecked=0, Total=16770 [2018-10-22 15:49:39,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-10-22 15:49:39,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2018-10-22 15:49:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-10-22 15:49:39,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2018-10-22 15:49:39,299 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 255 [2018-10-22 15:49:39,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:39,299 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2018-10-22 15:49:39,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-22 15:49:39,300 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2018-10-22 15:49:39,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-10-22 15:49:39,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:39,301 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:39,301 INFO L424 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:39,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:39,301 INFO L82 PathProgramCache]: Analyzing trace with hash 903828486, now seen corresponding path program 82 times [2018-10-22 15:49:39,301 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:39,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:39,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:39,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:39,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:40,189 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 15:49:40,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:40,190 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 15:49:40,196 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:49:40,307 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:49:40,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:40,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:40,408 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 15:49:40,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:40,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-10-22 15:49:40,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-22 15:49:40,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-22 15:49:40,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:49:40,431 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand 48 states. [2018-10-22 15:49:41,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:41,797 INFO L93 Difference]: Finished difference Result 271 states and 272 transitions. [2018-10-22 15:49:41,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-22 15:49:41,797 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 257 [2018-10-22 15:49:41,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:41,798 INFO L225 Difference]: With dead ends: 271 [2018-10-22 15:49:41,798 INFO L226 Difference]: Without dead ends: 269 [2018-10-22 15:49:41,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3109, Invalid=5263, Unknown=0, NotChecked=0, Total=8372 [2018-10-22 15:49:41,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-10-22 15:49:41,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 262. [2018-10-22 15:49:41,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-10-22 15:49:41,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2018-10-22 15:49:41,873 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 257 [2018-10-22 15:49:41,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:41,874 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2018-10-22 15:49:41,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-22 15:49:41,874 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2018-10-22 15:49:41,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-10-22 15:49:41,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:41,875 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:41,875 INFO L424 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:41,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:41,876 INFO L82 PathProgramCache]: Analyzing trace with hash -682613297, now seen corresponding path program 83 times [2018-10-22 15:49:41,876 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:41,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:41,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:41,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:41,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:44,019 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 15:49:44,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:44,019 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 15:49:44,026 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:49:44,218 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-22 15:49:44,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:44,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:44,278 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 15:49:44,299 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:44,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-22 15:49:44,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-22 15:49:44,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-22 15:49:44,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1981, Invalid=5851, Unknown=0, NotChecked=0, Total=7832 [2018-10-22 15:49:44,301 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand 89 states. [2018-10-22 15:49:47,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:47,520 INFO L93 Difference]: Finished difference Result 441 states and 443 transitions. [2018-10-22 15:49:47,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-22 15:49:47,520 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 261 [2018-10-22 15:49:47,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:47,521 INFO L225 Difference]: With dead ends: 441 [2018-10-22 15:49:47,521 INFO L226 Difference]: Without dead ends: 264 [2018-10-22 15:49:47,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2751 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4049, Invalid=13507, Unknown=0, NotChecked=0, Total=17556 [2018-10-22 15:49:47,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-10-22 15:49:47,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2018-10-22 15:49:47,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-10-22 15:49:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 265 transitions. [2018-10-22 15:49:47,598 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 265 transitions. Word has length 261 [2018-10-22 15:49:47,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:47,598 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 265 transitions. [2018-10-22 15:49:47,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-22 15:49:47,598 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 265 transitions. [2018-10-22 15:49:47,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-10-22 15:49:47,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:47,600 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 42, 42, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:47,600 INFO L424 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:47,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:47,600 INFO L82 PathProgramCache]: Analyzing trace with hash -838597623, now seen corresponding path program 84 times [2018-10-22 15:49:47,600 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:47,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:47,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:47,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:47,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:48,542 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 15:49:48,543 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:48,543 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 15:49:48,551 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:49:48,746 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-10-22 15:49:48,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:48,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:48,831 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 15:49:48,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:48,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-10-22 15:49:48,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-22 15:49:48,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-22 15:49:48,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:49:48,853 INFO L87 Difference]: Start difference. First operand 264 states and 265 transitions. Second operand 49 states. [2018-10-22 15:49:50,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:50,067 INFO L93 Difference]: Finished difference Result 277 states and 278 transitions. [2018-10-22 15:49:50,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-22 15:49:50,067 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 263 [2018-10-22 15:49:50,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:50,068 INFO L225 Difference]: With dead ends: 277 [2018-10-22 15:49:50,068 INFO L226 Difference]: Without dead ends: 275 [2018-10-22 15:49:50,069 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 15:49:50,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-10-22 15:49:50,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 268. [2018-10-22 15:49:50,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-22 15:49:50,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 269 transitions. [2018-10-22 15:49:50,166 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 269 transitions. Word has length 263 [2018-10-22 15:49:50,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:50,167 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 269 transitions. [2018-10-22 15:49:50,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-22 15:49:50,167 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 269 transitions. [2018-10-22 15:49:50,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-22 15:49:50,168 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:50,168 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:50,168 INFO L424 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:50,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:50,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1841765458, now seen corresponding path program 85 times [2018-10-22 15:49:50,169 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:50,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:50,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:50,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:50,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:50,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:52,599 INFO L134 CoverageAnalysis]: Checked inductivity of 5633 backedges. 3741 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:52,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:52,599 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:52,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:52,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5633 backedges. 3741 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:52,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:52,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-22 15:49:52,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-22 15:49:52,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-22 15:49:52,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=6119, Unknown=0, NotChecked=0, Total=8190 [2018-10-22 15:49:52,815 INFO L87 Difference]: Start difference. First operand 268 states and 269 transitions. Second operand 91 states. [2018-10-22 15:49:56,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:56,277 INFO L93 Difference]: Finished difference Result 451 states and 453 transitions. [2018-10-22 15:49:56,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-22 15:49:56,277 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 267 [2018-10-22 15:49:56,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:56,278 INFO L225 Difference]: With dead ends: 451 [2018-10-22 15:49:56,278 INFO L226 Difference]: Without dead ends: 270 [2018-10-22 15:49:56,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4231, Invalid=14129, Unknown=0, NotChecked=0, Total=18360 [2018-10-22 15:49:56,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-10-22 15:49:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2018-10-22 15:49:56,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-10-22 15:49:56,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 271 transitions. [2018-10-22 15:49:56,368 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 271 transitions. Word has length 267 [2018-10-22 15:49:56,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:56,368 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 271 transitions. [2018-10-22 15:49:56,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-22 15:49:56,369 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 271 transitions. [2018-10-22 15:49:56,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2018-10-22 15:49:56,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:56,370 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 43, 43, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:56,370 INFO L424 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:56,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:56,370 INFO L82 PathProgramCache]: Analyzing trace with hash -171579636, now seen corresponding path program 86 times [2018-10-22 15:49:56,370 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:56,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:56,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:56,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:49:56,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:49:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5721 backedges. 1980 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:57,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:49:57,390 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:49:57,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:49:57,515 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:49:57,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:49:57,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:49:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5721 backedges. 1980 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:49:57,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:49:57,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2018-10-22 15:49:57,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-22 15:49:57,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-22 15:49:57,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:49:57,645 INFO L87 Difference]: Start difference. First operand 270 states and 271 transitions. Second operand 50 states. [2018-10-22 15:49:58,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:49:58,938 INFO L93 Difference]: Finished difference Result 283 states and 284 transitions. [2018-10-22 15:49:58,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-22 15:49:58,939 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 269 [2018-10-22 15:49:58,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:49:58,940 INFO L225 Difference]: With dead ends: 283 [2018-10-22 15:49:58,940 INFO L226 Difference]: Without dead ends: 281 [2018-10-22 15:49:58,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3388, Invalid=5732, Unknown=0, NotChecked=0, Total=9120 [2018-10-22 15:49:58,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-10-22 15:49:59,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 274. [2018-10-22 15:49:59,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-10-22 15:49:59,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 275 transitions. [2018-10-22 15:49:59,021 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 275 transitions. Word has length 269 [2018-10-22 15:49:59,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:49:59,021 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 275 transitions. [2018-10-22 15:49:59,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-22 15:49:59,022 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 275 transitions. [2018-10-22 15:49:59,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-10-22 15:49:59,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:49:59,023 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2018-10-22 15:49:59,023 INFO L424 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:49:59,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:49:59,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1275708885, now seen corresponding path program 87 times [2018-10-22 15:49:59,023 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:49:59,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:49:59,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:59,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:49:59,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:49:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5896 backedges. 3916 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:01,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:01,782 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:01,789 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:01,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-22 15:50:01,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:02,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5896 backedges. 3916 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:02,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:02,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-22 15:50:02,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-22 15:50:02,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-22 15:50:02,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2163, Invalid=6393, Unknown=0, NotChecked=0, Total=8556 [2018-10-22 15:50:02,087 INFO L87 Difference]: Start difference. First operand 274 states and 275 transitions. Second operand 93 states. [2018-10-22 15:50:05,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:05,515 INFO L93 Difference]: Finished difference Result 461 states and 463 transitions. [2018-10-22 15:50:05,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-22 15:50:05,515 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 273 [2018-10-22 15:50:05,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:05,516 INFO L225 Difference]: With dead ends: 461 [2018-10-22 15:50:05,516 INFO L226 Difference]: Without dead ends: 276 [2018-10-22 15:50:05,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3014 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4417, Invalid=14765, Unknown=0, NotChecked=0, Total=19182 [2018-10-22 15:50:05,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-10-22 15:50:05,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2018-10-22 15:50:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-10-22 15:50:05,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 277 transitions. [2018-10-22 15:50:05,599 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 277 transitions. Word has length 273 [2018-10-22 15:50:05,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:05,599 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 277 transitions. [2018-10-22 15:50:05,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-22 15:50:05,599 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 277 transitions. [2018-10-22 15:50:05,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-10-22 15:50:05,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:05,600 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 44, 44, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:05,601 INFO L424 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:05,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:05,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2005933327, now seen corresponding path program 88 times [2018-10-22 15:50:05,601 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:05,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:05,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:05,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:05,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 2070 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:07,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:07,002 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:07,009 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:07,146 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:07,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:07,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 2070 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:07,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:07,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-10-22 15:50:07,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-22 15:50:07,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-22 15:50:07,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 15:50:07,290 INFO L87 Difference]: Start difference. First operand 276 states and 277 transitions. Second operand 51 states. [2018-10-22 15:50:08,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:08,611 INFO L93 Difference]: Finished difference Result 289 states and 290 transitions. [2018-10-22 15:50:08,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-22 15:50:08,612 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 275 [2018-10-22 15:50:08,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:08,613 INFO L225 Difference]: With dead ends: 289 [2018-10-22 15:50:08,613 INFO L226 Difference]: Without dead ends: 287 [2018-10-22 15:50:08,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2253 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3532, Invalid=5974, Unknown=0, NotChecked=0, Total=9506 [2018-10-22 15:50:08,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-10-22 15:50:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 280. [2018-10-22 15:50:08,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-22 15:50:08,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 281 transitions. [2018-10-22 15:50:08,699 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 281 transitions. Word has length 275 [2018-10-22 15:50:08,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:08,699 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 281 transitions. [2018-10-22 15:50:08,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-22 15:50:08,699 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 281 transitions. [2018-10-22 15:50:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-22 15:50:08,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:08,700 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:08,700 INFO L424 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:08,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:08,701 INFO L82 PathProgramCache]: Analyzing trace with hash -772586920, now seen corresponding path program 89 times [2018-10-22 15:50:08,701 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:08,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:08,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:08,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:08,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6165 backedges. 4095 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:11,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:11,166 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:11,173 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:11,372 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-22 15:50:11,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:11,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6165 backedges. 4095 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:11,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:11,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-22 15:50:11,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-22 15:50:11,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-22 15:50:11,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2257, Invalid=6673, Unknown=0, NotChecked=0, Total=8930 [2018-10-22 15:50:11,495 INFO L87 Difference]: Start difference. First operand 280 states and 281 transitions. Second operand 95 states. [2018-10-22 15:50:14,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:14,952 INFO L93 Difference]: Finished difference Result 471 states and 473 transitions. [2018-10-22 15:50:14,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-22 15:50:14,953 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 279 [2018-10-22 15:50:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:14,954 INFO L225 Difference]: With dead ends: 471 [2018-10-22 15:50:14,954 INFO L226 Difference]: Without dead ends: 282 [2018-10-22 15:50:14,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3150 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4607, Invalid=15415, Unknown=0, NotChecked=0, Total=20022 [2018-10-22 15:50:14,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-10-22 15:50:15,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2018-10-22 15:50:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-10-22 15:50:15,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 283 transitions. [2018-10-22 15:50:15,040 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 283 transitions. Word has length 279 [2018-10-22 15:50:15,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:15,040 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 283 transitions. [2018-10-22 15:50:15,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-22 15:50:15,040 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 283 transitions. [2018-10-22 15:50:15,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-10-22 15:50:15,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:15,041 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 45, 45, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:15,042 INFO L424 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:15,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:15,042 INFO L82 PathProgramCache]: Analyzing trace with hash -79313390, now seen corresponding path program 90 times [2018-10-22 15:50:15,042 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:15,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:15,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:15,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:15,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6257 backedges. 2162 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:16,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:16,100 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:16,109 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:16,307 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-10-22 15:50:16,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:16,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6257 backedges. 2162 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:16,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:16,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2018-10-22 15:50:16,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-22 15:50:16,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-22 15:50:16,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:50:16,486 INFO L87 Difference]: Start difference. First operand 282 states and 283 transitions. Second operand 52 states. [2018-10-22 15:50:17,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:17,939 INFO L93 Difference]: Finished difference Result 295 states and 296 transitions. [2018-10-22 15:50:17,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-22 15:50:17,939 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 281 [2018-10-22 15:50:17,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:17,940 INFO L225 Difference]: With dead ends: 295 [2018-10-22 15:50:17,940 INFO L226 Difference]: Without dead ends: 293 [2018-10-22 15:50:17,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3679, Invalid=6221, Unknown=0, NotChecked=0, Total=9900 [2018-10-22 15:50:17,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-10-22 15:50:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 286. [2018-10-22 15:50:18,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-10-22 15:50:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2018-10-22 15:50:18,029 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 281 [2018-10-22 15:50:18,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:18,030 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2018-10-22 15:50:18,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-22 15:50:18,030 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2018-10-22 15:50:18,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-10-22 15:50:18,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:18,031 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:18,031 INFO L424 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:18,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:18,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1059671589, now seen corresponding path program 91 times [2018-10-22 15:50:18,032 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:18,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:18,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:18,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:18,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6440 backedges. 4278 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:20,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:20,610 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:20,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:20,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6440 backedges. 4278 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:20,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:20,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-22 15:50:20,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-22 15:50:20,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-22 15:50:20,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2353, Invalid=6959, Unknown=0, NotChecked=0, Total=9312 [2018-10-22 15:50:20,843 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand 97 states. [2018-10-22 15:50:24,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:24,702 INFO L93 Difference]: Finished difference Result 481 states and 483 transitions. [2018-10-22 15:50:24,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-22 15:50:24,702 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 285 [2018-10-22 15:50:24,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:24,703 INFO L225 Difference]: With dead ends: 481 [2018-10-22 15:50:24,703 INFO L226 Difference]: Without dead ends: 288 [2018-10-22 15:50:24,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3289 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4801, Invalid=16079, Unknown=0, NotChecked=0, Total=20880 [2018-10-22 15:50:24,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-10-22 15:50:24,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2018-10-22 15:50:24,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2018-10-22 15:50:24,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 289 transitions. [2018-10-22 15:50:24,793 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 289 transitions. Word has length 285 [2018-10-22 15:50:24,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:24,793 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 289 transitions. [2018-10-22 15:50:24,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-22 15:50:24,793 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 289 transitions. [2018-10-22 15:50:24,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-10-22 15:50:24,794 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:24,794 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 46, 46, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:24,794 INFO L424 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:24,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:24,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1682047509, now seen corresponding path program 92 times [2018-10-22 15:50:24,795 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:24,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:24,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:24,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:24,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6534 backedges. 2256 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:25,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:25,881 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:25,890 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:26,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:26,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:26,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6534 backedges. 2256 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:26,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:26,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-10-22 15:50:26,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-22 15:50:26,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-22 15:50:26,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1476, Unknown=0, NotChecked=0, Total=2756 [2018-10-22 15:50:26,165 INFO L87 Difference]: Start difference. First operand 288 states and 289 transitions. Second operand 53 states. [2018-10-22 15:50:27,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:27,718 INFO L93 Difference]: Finished difference Result 301 states and 302 transitions. [2018-10-22 15:50:27,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-22 15:50:27,718 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 287 [2018-10-22 15:50:27,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:27,719 INFO L225 Difference]: With dead ends: 301 [2018-10-22 15:50:27,720 INFO L226 Difference]: Without dead ends: 299 [2018-10-22 15:50:27,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2447 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3829, Invalid=6473, Unknown=0, NotChecked=0, Total=10302 [2018-10-22 15:50:27,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-10-22 15:50:27,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 292. [2018-10-22 15:50:27,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-22 15:50:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 293 transitions. [2018-10-22 15:50:27,814 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 293 transitions. Word has length 287 [2018-10-22 15:50:27,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:27,814 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 293 transitions. [2018-10-22 15:50:27,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-22 15:50:27,814 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 293 transitions. [2018-10-22 15:50:27,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-22 15:50:27,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:27,815 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:27,815 INFO L424 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:27,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:27,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1719716770, now seen corresponding path program 93 times [2018-10-22 15:50:27,816 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:27,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:27,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:27,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:27,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:30,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6721 backedges. 4465 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:30,572 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:30,572 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:30,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:30,788 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-22 15:50:30,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:30,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6721 backedges. 4465 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:30,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:30,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-22 15:50:30,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-22 15:50:30,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-22 15:50:30,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2451, Invalid=7251, Unknown=0, NotChecked=0, Total=9702 [2018-10-22 15:50:30,884 INFO L87 Difference]: Start difference. First operand 292 states and 293 transitions. Second operand 99 states. [2018-10-22 15:50:34,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:34,973 INFO L93 Difference]: Finished difference Result 491 states and 493 transitions. [2018-10-22 15:50:34,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-22 15:50:34,973 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 291 [2018-10-22 15:50:34,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:34,974 INFO L225 Difference]: With dead ends: 491 [2018-10-22 15:50:34,975 INFO L226 Difference]: Without dead ends: 294 [2018-10-22 15:50:34,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3431 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4999, Invalid=16757, Unknown=0, NotChecked=0, Total=21756 [2018-10-22 15:50:34,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-10-22 15:50:35,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2018-10-22 15:50:35,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-10-22 15:50:35,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 295 transitions. [2018-10-22 15:50:35,060 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 295 transitions. Word has length 291 [2018-10-22 15:50:35,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:35,060 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 295 transitions. [2018-10-22 15:50:35,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-22 15:50:35,061 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 295 transitions. [2018-10-22 15:50:35,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-10-22 15:50:35,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:35,062 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 47, 47, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:35,062 INFO L424 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:35,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:35,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1353191144, now seen corresponding path program 94 times [2018-10-22 15:50:35,063 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:35,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:35,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:35,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:35,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6817 backedges. 2352 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:36,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:36,201 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:36,211 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:36,340 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:36,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:36,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6817 backedges. 2352 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:36,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:36,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2018-10-22 15:50:36,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-22 15:50:36,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-22 15:50:36,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2018-10-22 15:50:36,462 INFO L87 Difference]: Start difference. First operand 294 states and 295 transitions. Second operand 54 states. [2018-10-22 15:50:38,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:38,106 INFO L93 Difference]: Finished difference Result 307 states and 308 transitions. [2018-10-22 15:50:38,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-22 15:50:38,106 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 293 [2018-10-22 15:50:38,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:38,107 INFO L225 Difference]: With dead ends: 307 [2018-10-22 15:50:38,107 INFO L226 Difference]: Without dead ends: 305 [2018-10-22 15:50:38,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3982, Invalid=6730, Unknown=0, NotChecked=0, Total=10712 [2018-10-22 15:50:38,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2018-10-22 15:50:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 298. [2018-10-22 15:50:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2018-10-22 15:50:38,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 299 transitions. [2018-10-22 15:50:38,203 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 299 transitions. Word has length 293 [2018-10-22 15:50:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:38,204 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 299 transitions. [2018-10-22 15:50:38,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-22 15:50:38,204 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 299 transitions. [2018-10-22 15:50:38,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-10-22 15:50:38,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:38,205 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:38,205 INFO L424 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:38,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:38,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2049960417, now seen corresponding path program 95 times [2018-10-22 15:50:38,205 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:38,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:38,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:38,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:38,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7008 backedges. 4656 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:41,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:41,071 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:41,080 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... [2018-10-22 15:50:41,304 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-22 15:50:41,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:41,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:41,312 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-22 15:50:41,513 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:41,514 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 15:50:41,519 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 15:50:41,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:50:41 BoogieIcfgContainer [2018-10-22 15:50:41,519 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:50:41,520 INFO L168 Benchmark]: Toolchain (without parser) took 233421.26 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 619.7 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -628.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:50:41,521 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 15:50:41,521 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.65 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 15:50:41,521 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.29 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 15:50:41,521 INFO L168 Benchmark]: Boogie Preprocessor took 27.03 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 15:50:41,521 INFO L168 Benchmark]: RCFGBuilder took 358.48 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -807.9 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:50:41,522 INFO L168 Benchmark]: TraceAbstraction took 232711.26 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -135.3 MB). Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 168.6 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. [2018-10-22 15:50:41,523 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 277.65 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 42.29 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 27.03 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 358.48 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -807.9 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 232711.26 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -135.3 MB). Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 168.6 MB). Peak memory consumption was 33.3 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 298 with TraceHistMax 49,while TraceCheckSpWp was constructing forward predicates,while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. TIMEOUT Result, 232.6s OverallTime, 98 OverallIterations, 49 TraceHistogramMax, 118.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4171 SDtfs, 9248 SDslu, 62297 SDs, 0 SdLazy, 65586 SolverSat, 5558 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 41.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21965 GetRequests, 15704 SyntacticMatches, 0 SemanticMatches, 6261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100441 ImplicationChecksByTransitivity, 143.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=298occurred in iteration=97, 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: 3.5s AutomataMinimizationTime, 97 MinimizatonAttempts, 336 StatesRemovedByMinimization, 48 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.4s SsaConstructionTime, 8.1s SatisfiabilityAnalysisTime, 92.5s InterpolantComputationTime, 28980 NumberOfCodeBlocks, 28980 NumberOfCodeBlocksAsserted, 1350 NumberOfCheckSat, 28789 ConstructedInterpolants, 0 QuantifiedInterpolants, 16861139 SizeOfPredicates, 282 NumberOfNonLiveVariables, 40702 ConjunctsInSsa, 5076 ConjunctsInUnsatCore, 191 InterpolantComputations, 3 PerfectInterpolantSequences, 223534/442366 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown