java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-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-new/count_by_k_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 22:52:59,071 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 22:52:59,073 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 22:52:59,085 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 22:52:59,086 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 22:52:59,087 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 22:52:59,089 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 22:52:59,091 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 22:52:59,093 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 22:52:59,094 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 22:52:59,095 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 22:52:59,095 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 22:52:59,096 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 22:52:59,097 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 22:52:59,098 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 22:52:59,098 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 22:52:59,099 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 22:52:59,101 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 22:52:59,103 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 22:52:59,105 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 22:52:59,106 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 22:52:59,107 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 22:52:59,110 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-06 22:52:59,110 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-06 22:52:59,110 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-06 22:52:59,111 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-06 22:52:59,112 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-06 22:52:59,113 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-06 22:52:59,114 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-06 22:52:59,115 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-06 22:52:59,115 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-06 22:52:59,116 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-06 22:52:59,118 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-11-06 22:52:59,137 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 22:52:59,138 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 22:52:59,138 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 22:52:59,139 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 22:52:59,139 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 22:52:59,139 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 22:52:59,140 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 22:52:59,140 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 22:52:59,140 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 22:52:59,140 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 22:52:59,140 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 22:52:59,141 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 22:52:59,141 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 22:52:59,141 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 22:52:59,141 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 22:52:59,141 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 22:52:59,142 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 22:52:59,142 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 22:52:59,142 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 22:52:59,142 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:52:59,142 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 22:52:59,142 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 22:52:59,143 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 22:52:59,143 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 22:52:59,143 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 22:52:59,143 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 22:52:59,143 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 22:52:59,144 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 22:52:59,202 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 22:52:59,219 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 22:52:59,224 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 22:52:59,225 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 22:52:59,226 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 22:52:59,227 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_k_true-unreach-call_true-termination.i [2018-11-06 22:52:59,288 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b1df64d5/fe4a01aeedf74c15920cba3925f44d2e/FLAG857296c09 [2018-11-06 22:52:59,691 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 22:52:59,692 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_k_true-unreach-call_true-termination.i [2018-11-06 22:52:59,698 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b1df64d5/fe4a01aeedf74c15920cba3925f44d2e/FLAG857296c09 [2018-11-06 22:52:59,714 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b1df64d5/fe4a01aeedf74c15920cba3925f44d2e [2018-11-06 22:52:59,722 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 22:52:59,723 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 22:52:59,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 22:52:59,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 22:52:59,728 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 22:52:59,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:59" (1/1) ... [2018-11-06 22:52:59,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6698ba59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:59, skipping insertion in model container [2018-11-06 22:52:59,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:59" (1/1) ... [2018-11-06 22:52:59,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 22:52:59,768 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 22:53:00,001 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:53:00,006 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 22:53:00,022 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:53:00,034 INFO L193 MainTranslator]: Completed translation [2018-11-06 22:53:00,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:00 WrapperNode [2018-11-06 22:53:00,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 22:53:00,036 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 22:53:00,036 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 22:53:00,036 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 22:53:00,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:00" (1/1) ... [2018-11-06 22:53:00,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:00" (1/1) ... [2018-11-06 22:53:00,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 22:53:00,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 22:53:00,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 22:53:00,066 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 22:53:00,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:00" (1/1) ... [2018-11-06 22:53:00,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:00" (1/1) ... [2018-11-06 22:53:00,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:00" (1/1) ... [2018-11-06 22:53:00,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:00" (1/1) ... [2018-11-06 22:53:00,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:00" (1/1) ... [2018-11-06 22:53:00,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:00" (1/1) ... [2018-11-06 22:53:00,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:00" (1/1) ... [2018-11-06 22:53:00,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 22:53:00,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 22:53:00,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 22:53:00,083 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 22:53:00,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:53:00,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 22:53:00,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 22:53:00,413 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 22:53:00,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:00 BoogieIcfgContainer [2018-11-06 22:53:00,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 22:53:00,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 22:53:00,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 22:53:00,418 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 22:53:00,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:52:59" (1/3) ... [2018-11-06 22:53:00,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47ca2e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:00, skipping insertion in model container [2018-11-06 22:53:00,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:53:00" (2/3) ... [2018-11-06 22:53:00,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47ca2e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:53:00, skipping insertion in model container [2018-11-06 22:53:00,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:53:00" (3/3) ... [2018-11-06 22:53:00,421 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k_true-unreach-call_true-termination.i [2018-11-06 22:53:00,430 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 22:53:00,438 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 22:53:00,454 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 22:53:00,484 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 22:53:00,484 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 22:53:00,485 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 22:53:00,485 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 22:53:00,485 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 22:53:00,485 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 22:53:00,485 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 22:53:00,485 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 22:53:00,485 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 22:53:00,498 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-11-06 22:53:00,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-11-06 22:53:00,504 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:00,505 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:00,508 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:00,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:00,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1807151048, now seen corresponding path program 1 times [2018-11-06 22:53:00,516 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:00,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:00,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:00,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:53:00,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:00,623 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:53:00,623 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 22:53:00,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-06 22:53:00,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-06 22:53:00,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:53:00,651 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2018-11-06 22:53:00,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:00,672 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2018-11-06 22:53:00,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-06 22:53:00,674 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2018-11-06 22:53:00,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:00,688 INFO L225 Difference]: With dead ends: 22 [2018-11-06 22:53:00,688 INFO L226 Difference]: Without dead ends: 10 [2018-11-06 22:53:00,692 INFO L604 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 [2018-11-06 22:53:00,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-11-06 22:53:00,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-11-06 22:53:00,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-11-06 22:53:00,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-11-06 22:53:00,728 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-11-06 22:53:00,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:00,728 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-11-06 22:53:00,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-06 22:53:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-11-06 22:53:00,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-06 22:53:00,729 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:00,730 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:00,730 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:00,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:00,730 INFO L82 PathProgramCache]: Analyzing trace with hash 178554705, now seen corresponding path program 1 times [2018-11-06 22:53:00,731 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:00,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:00,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:00,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:53:00,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:00,944 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-11-06 22:53:01,222 WARN L179 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 7 [2018-11-06 22:53:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:01,241 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:53:01,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-06 22:53:01,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 22:53:01,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 22:53:01,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:53:01,244 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 5 states. [2018-11-06 22:53:01,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:01,389 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-11-06 22:53:01,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 22:53:01,390 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-11-06 22:53:01,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:01,391 INFO L225 Difference]: With dead ends: 16 [2018-11-06 22:53:01,391 INFO L226 Difference]: Without dead ends: 12 [2018-11-06 22:53:01,393 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:53:01,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-06 22:53:01,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-06 22:53:01,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-06 22:53:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-06 22:53:01,401 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2018-11-06 22:53:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:01,402 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-06 22:53:01,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 22:53:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-06 22:53:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-06 22:53:01,403 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:01,403 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:01,403 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:01,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:01,405 INFO L82 PathProgramCache]: Analyzing trace with hash -494066964, now seen corresponding path program 1 times [2018-11-06 22:53:01,405 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:01,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:01,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:01,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:53:01,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:01,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:01,494 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:53:01,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:53:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:01,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:01,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:01,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-11-06 22:53:01,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 22:53:01,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 22:53:01,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:53:01,791 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states. [2018-11-06 22:53:01,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:01,889 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-11-06 22:53:01,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 22:53:01,890 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-11-06 22:53:01,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:01,891 INFO L225 Difference]: With dead ends: 25 [2018-11-06 22:53:01,891 INFO L226 Difference]: Without dead ends: 21 [2018-11-06 22:53:01,892 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:53:01,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-06 22:53:01,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-06 22:53:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-06 22:53:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-11-06 22:53:01,897 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 11 [2018-11-06 22:53:01,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:01,897 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-11-06 22:53:01,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 22:53:01,897 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-11-06 22:53:01,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-06 22:53:01,898 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:01,898 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:01,898 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:01,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:01,899 INFO L82 PathProgramCache]: Analyzing trace with hash 211590033, now seen corresponding path program 2 times [2018-11-06 22:53:01,899 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:01,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:01,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:01,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:53:01,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:02,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:02,079 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:53:02,094 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:53:02,110 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:53:02,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:02,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:02,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:02,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-11-06 22:53:02,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 22:53:02,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 22:53:02,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:53:02,288 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 10 states. [2018-11-06 22:53:03,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:03,174 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-11-06 22:53:03,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:53:03,174 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-11-06 22:53:03,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:03,175 INFO L225 Difference]: With dead ends: 34 [2018-11-06 22:53:03,176 INFO L226 Difference]: Without dead ends: 30 [2018-11-06 22:53:03,177 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:53:03,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-06 22:53:03,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-06 22:53:03,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-06 22:53:03,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-11-06 22:53:03,183 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 20 [2018-11-06 22:53:03,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:03,183 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-11-06 22:53:03,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 22:53:03,184 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-11-06 22:53:03,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-06 22:53:03,185 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:03,185 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:03,185 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:03,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:03,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1547039604, now seen corresponding path program 3 times [2018-11-06 22:53:03,186 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:03,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:03,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:03,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:03,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:03,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:03,444 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:53:03,463 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:53:03,504 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-11-06 22:53:03,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:03,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:03,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:03,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2018-11-06 22:53:03,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-06 22:53:03,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-06 22:53:03,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:53:03,724 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 13 states. [2018-11-06 22:53:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:04,215 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-11-06 22:53:04,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-06 22:53:04,216 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2018-11-06 22:53:04,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:04,219 INFO L225 Difference]: With dead ends: 43 [2018-11-06 22:53:04,219 INFO L226 Difference]: Without dead ends: 39 [2018-11-06 22:53:04,220 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:53:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-06 22:53:04,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-06 22:53:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-06 22:53:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-11-06 22:53:04,228 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 29 [2018-11-06 22:53:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:04,229 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-11-06 22:53:04,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-06 22:53:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-11-06 22:53:04,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-06 22:53:04,230 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:04,230 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:04,231 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:04,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:04,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1958512113, now seen corresponding path program 4 times [2018-11-06 22:53:04,231 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:04,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:04,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:04,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:04,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:04,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:04,853 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:53:04,862 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:53:04,900 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:53:04,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:04,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:05,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:05,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-11-06 22:53:05,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-06 22:53:05,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-06 22:53:05,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:53:05,613 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 25 states. [2018-11-06 22:53:06,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:06,432 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2018-11-06 22:53:06,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 22:53:06,436 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2018-11-06 22:53:06,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:06,438 INFO L225 Difference]: With dead ends: 52 [2018-11-06 22:53:06,438 INFO L226 Difference]: Without dead ends: 48 [2018-11-06 22:53:06,439 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2018-11-06 22:53:06,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-06 22:53:06,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-06 22:53:06,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-06 22:53:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-11-06 22:53:06,447 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 38 [2018-11-06 22:53:06,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:06,447 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-11-06 22:53:06,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-06 22:53:06,447 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-11-06 22:53:06,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-11-06 22:53:06,449 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:06,449 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:06,449 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:06,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:06,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1417949652, now seen corresponding path program 5 times [2018-11-06 22:53:06,450 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:06,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:06,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:06,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:06,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:07,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:07,007 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:53:07,024 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:53:07,067 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-11-06 22:53:07,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:07,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:07,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:07,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2018-11-06 22:53:07,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-06 22:53:07,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-06 22:53:07,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:53:07,211 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 19 states. [2018-11-06 22:53:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:08,033 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2018-11-06 22:53:08,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-06 22:53:08,034 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2018-11-06 22:53:08,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:08,038 INFO L225 Difference]: With dead ends: 61 [2018-11-06 22:53:08,038 INFO L226 Difference]: Without dead ends: 57 [2018-11-06 22:53:08,039 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=309, Invalid=813, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 22:53:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-06 22:53:08,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-06 22:53:08,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-06 22:53:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-11-06 22:53:08,047 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 47 [2018-11-06 22:53:08,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:08,048 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-11-06 22:53:08,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-06 22:53:08,048 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-11-06 22:53:08,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-06 22:53:08,050 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:08,051 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:08,051 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:08,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:08,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1873110959, now seen corresponding path program 6 times [2018-11-06 22:53:08,052 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:08,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:08,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:08,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:08,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:08,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:08,493 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:53:08,502 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:53:08,526 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-11-06 22:53:08,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:08,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:08,670 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:08,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2018-11-06 22:53:08,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 22:53:08,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 22:53:08,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:53:08,672 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 22 states. [2018-11-06 22:53:09,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:09,914 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2018-11-06 22:53:09,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 22:53:09,915 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 56 [2018-11-06 22:53:09,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:09,917 INFO L225 Difference]: With dead ends: 70 [2018-11-06 22:53:09,917 INFO L226 Difference]: Without dead ends: 66 [2018-11-06 22:53:09,919 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=423, Invalid=1137, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:53:09,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-06 22:53:09,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-06 22:53:09,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-06 22:53:09,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-11-06 22:53:09,928 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 56 [2018-11-06 22:53:09,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:09,929 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-11-06 22:53:09,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 22:53:09,929 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-11-06 22:53:09,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-06 22:53:09,931 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:09,931 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:09,931 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:09,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:09,931 INFO L82 PathProgramCache]: Analyzing trace with hash -2028181556, now seen corresponding path program 7 times [2018-11-06 22:53:09,931 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:09,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:09,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:09,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:09,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:10,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:10,823 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:53:10,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:53:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:10,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:11,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:11,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2018-11-06 22:53:11,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-06 22:53:11,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-06 22:53:11,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=548, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:53:11,005 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 25 states. [2018-11-06 22:53:11,235 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 8 [2018-11-06 22:53:12,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:12,311 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2018-11-06 22:53:12,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-06 22:53:12,311 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2018-11-06 22:53:12,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:12,313 INFO L225 Difference]: With dead ends: 79 [2018-11-06 22:53:12,313 INFO L226 Difference]: Without dead ends: 75 [2018-11-06 22:53:12,315 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=555, Invalid=1515, Unknown=0, NotChecked=0, Total=2070 [2018-11-06 22:53:12,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-06 22:53:12,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-06 22:53:12,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-06 22:53:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-11-06 22:53:12,322 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 65 [2018-11-06 22:53:12,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:12,322 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-11-06 22:53:12,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-06 22:53:12,323 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-11-06 22:53:12,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-11-06 22:53:12,324 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:12,324 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:12,324 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:12,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:12,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1530712753, now seen corresponding path program 8 times [2018-11-06 22:53:12,325 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:12,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:12,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:12,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:53:12,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:12,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:12,846 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:53:12,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:53:12,913 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:53:12,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:12,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:13,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:13,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2018-11-06 22:53:13,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-06 22:53:13,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-06 22:53:13,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:53:13,181 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 28 states. [2018-11-06 22:53:13,543 WARN L179 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 8 [2018-11-06 22:53:15,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:15,100 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2018-11-06 22:53:15,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-06 22:53:15,101 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 74 [2018-11-06 22:53:15,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:15,102 INFO L225 Difference]: With dead ends: 88 [2018-11-06 22:53:15,102 INFO L226 Difference]: Without dead ends: 84 [2018-11-06 22:53:15,104 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=705, Invalid=1947, Unknown=0, NotChecked=0, Total=2652 [2018-11-06 22:53:15,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-06 22:53:15,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-11-06 22:53:15,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-11-06 22:53:15,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-11-06 22:53:15,113 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 74 [2018-11-06 22:53:15,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:15,113 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-11-06 22:53:15,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-06 22:53:15,114 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-11-06 22:53:15,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-11-06 22:53:15,115 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:15,115 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:15,115 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:15,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:15,116 INFO L82 PathProgramCache]: Analyzing trace with hash 430299500, now seen corresponding path program 9 times [2018-11-06 22:53:15,116 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:15,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:15,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:15,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:15,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:16,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:16,006 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:53:16,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:53:16,085 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-11-06 22:53:16,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:16,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:16,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:16,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2018-11-06 22:53:16,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-06 22:53:16,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-06 22:53:16,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=866, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:53:16,305 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 31 states. [2018-11-06 22:53:18,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:18,076 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2018-11-06 22:53:18,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-06 22:53:18,077 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 83 [2018-11-06 22:53:18,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:18,079 INFO L225 Difference]: With dead ends: 97 [2018-11-06 22:53:18,079 INFO L226 Difference]: Without dead ends: 93 [2018-11-06 22:53:18,080 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2018-11-06 22:53:18,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-11-06 22:53:18,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-11-06 22:53:18,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-06 22:53:18,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-11-06 22:53:18,087 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 83 [2018-11-06 22:53:18,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:18,088 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-11-06 22:53:18,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-06 22:53:18,088 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-11-06 22:53:18,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-11-06 22:53:18,090 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:18,090 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:18,090 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:18,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:18,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1414974191, now seen corresponding path program 10 times [2018-11-06 22:53:18,091 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:18,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:18,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:18,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:18,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:18,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:18,776 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:53:18,787 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:53:18,819 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:53:18,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:18,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:19,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:19,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2018-11-06 22:53:19,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-06 22:53:19,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-06 22:53:19,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1052, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 22:53:19,039 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 34 states. [2018-11-06 22:53:19,307 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 8 [2018-11-06 22:53:21,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:21,878 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2018-11-06 22:53:21,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-06 22:53:21,879 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 92 [2018-11-06 22:53:21,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:21,880 INFO L225 Difference]: With dead ends: 106 [2018-11-06 22:53:21,881 INFO L226 Difference]: Without dead ends: 102 [2018-11-06 22:53:21,883 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1059, Invalid=2973, Unknown=0, NotChecked=0, Total=4032 [2018-11-06 22:53:21,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-11-06 22:53:21,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-11-06 22:53:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-11-06 22:53:21,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-11-06 22:53:21,890 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 92 [2018-11-06 22:53:21,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:21,890 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-11-06 22:53:21,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-06 22:53:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-11-06 22:53:21,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-06 22:53:21,892 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:21,892 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:21,893 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:21,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:21,893 INFO L82 PathProgramCache]: Analyzing trace with hash 999432972, now seen corresponding path program 11 times [2018-11-06 22:53:21,893 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:21,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:21,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:21,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:21,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:22,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:22,949 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:53:22,958 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:53:23,022 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2018-11-06 22:53:23,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:23,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:23,309 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:23,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2018-11-06 22:53:23,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-06 22:53:23,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-06 22:53:23,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1256, Unknown=0, NotChecked=0, Total=1332 [2018-11-06 22:53:23,310 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 37 states. [2018-11-06 22:53:24,521 WARN L179 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 11 [2018-11-06 22:53:26,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:26,842 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2018-11-06 22:53:26,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-06 22:53:26,843 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 101 [2018-11-06 22:53:26,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:26,844 INFO L225 Difference]: With dead ends: 115 [2018-11-06 22:53:26,844 INFO L226 Difference]: Without dead ends: 111 [2018-11-06 22:53:26,845 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1263, Invalid=3567, Unknown=0, NotChecked=0, Total=4830 [2018-11-06 22:53:26,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-11-06 22:53:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-11-06 22:53:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-11-06 22:53:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-11-06 22:53:26,852 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 101 [2018-11-06 22:53:26,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:26,853 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-11-06 22:53:26,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-06 22:53:26,853 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-11-06 22:53:26,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-11-06 22:53:26,854 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:26,855 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:26,855 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:26,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:26,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1838825615, now seen corresponding path program 12 times [2018-11-06 22:53:26,855 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:26,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:26,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:26,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:26,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:27,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:27,777 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:53:27,785 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:53:27,823 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-11-06 22:53:27,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:27,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:28,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:28,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2018-11-06 22:53:28,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-06 22:53:28,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-06 22:53:28,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1478, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:53:28,070 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 40 states. [2018-11-06 22:53:28,627 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 11 [2018-11-06 22:53:31,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:31,399 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2018-11-06 22:53:31,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-06 22:53:31,400 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 110 [2018-11-06 22:53:31,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:31,401 INFO L225 Difference]: With dead ends: 124 [2018-11-06 22:53:31,401 INFO L226 Difference]: Without dead ends: 120 [2018-11-06 22:53:31,402 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1485, Invalid=4215, Unknown=0, NotChecked=0, Total=5700 [2018-11-06 22:53:31,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-11-06 22:53:31,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-11-06 22:53:31,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-11-06 22:53:31,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-11-06 22:53:31,409 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 110 [2018-11-06 22:53:31,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:31,410 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-11-06 22:53:31,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-06 22:53:31,410 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-11-06 22:53:31,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-11-06 22:53:31,411 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:31,412 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:31,412 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:31,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:31,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1524319404, now seen corresponding path program 13 times [2018-11-06 22:53:31,412 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:31,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:31,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:31,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:31,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:33,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:33,047 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:53:33,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:53:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:33,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:33,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:33,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2018-11-06 22:53:33,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-06 22:53:33,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-06 22:53:33,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1718, Unknown=0, NotChecked=0, Total=1806 [2018-11-06 22:53:33,419 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 43 states. [2018-11-06 22:53:37,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:37,386 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2018-11-06 22:53:37,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-06 22:53:37,386 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 119 [2018-11-06 22:53:37,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:37,388 INFO L225 Difference]: With dead ends: 133 [2018-11-06 22:53:37,388 INFO L226 Difference]: Without dead ends: 129 [2018-11-06 22:53:37,392 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1725, Invalid=4917, Unknown=0, NotChecked=0, Total=6642 [2018-11-06 22:53:37,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-11-06 22:53:37,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-11-06 22:53:37,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-11-06 22:53:37,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-11-06 22:53:37,397 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 119 [2018-11-06 22:53:37,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:37,398 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-11-06 22:53:37,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-06 22:53:37,398 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-11-06 22:53:37,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-11-06 22:53:37,399 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:37,399 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:37,400 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:37,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:37,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1162317359, now seen corresponding path program 14 times [2018-11-06 22:53:37,400 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:37,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:37,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:37,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:53:37,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:38,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:38,552 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:53:38,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:53:38,651 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:53:38,651 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:38,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:38,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:38,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 46 [2018-11-06 22:53:38,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-11-06 22:53:38,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-11-06 22:53:38,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1976, Unknown=0, NotChecked=0, Total=2070 [2018-11-06 22:53:38,910 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 46 states. [2018-11-06 22:53:39,455 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2018-11-06 22:53:39,622 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 11 [2018-11-06 22:53:40,023 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 11 [2018-11-06 22:53:43,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:43,722 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2018-11-06 22:53:43,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-06 22:53:43,731 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 128 [2018-11-06 22:53:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:43,732 INFO L225 Difference]: With dead ends: 142 [2018-11-06 22:53:43,732 INFO L226 Difference]: Without dead ends: 138 [2018-11-06 22:53:43,735 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1983, Invalid=5673, Unknown=0, NotChecked=0, Total=7656 [2018-11-06 22:53:43,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-11-06 22:53:43,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-11-06 22:53:43,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-11-06 22:53:43,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-11-06 22:53:43,741 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 128 [2018-11-06 22:53:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:43,741 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-11-06 22:53:43,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-11-06 22:53:43,742 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-11-06 22:53:43,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-11-06 22:53:43,743 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:43,743 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:43,743 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:43,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:43,744 INFO L82 PathProgramCache]: Analyzing trace with hash 452673100, now seen corresponding path program 15 times [2018-11-06 22:53:43,744 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:43,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:43,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:43,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:43,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:45,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:45,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:45,569 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:53:45,577 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:53:45,632 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-11-06 22:53:45,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:45,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:45,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:45,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 49 [2018-11-06 22:53:45,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-11-06 22:53:45,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-11-06 22:53:45,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2252, Unknown=0, NotChecked=0, Total=2352 [2018-11-06 22:53:45,867 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 49 states. [2018-11-06 22:53:46,030 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 8 [2018-11-06 22:53:46,353 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-11-06 22:53:46,598 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-11-06 22:53:46,836 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2018-11-06 22:53:46,978 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 11 [2018-11-06 22:53:47,129 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 11 [2018-11-06 22:53:47,290 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 11 [2018-11-06 22:53:47,447 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 11 [2018-11-06 22:53:51,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:51,399 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-11-06 22:53:51,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-11-06 22:53:51,400 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 137 [2018-11-06 22:53:51,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:51,401 INFO L225 Difference]: With dead ends: 151 [2018-11-06 22:53:51,401 INFO L226 Difference]: Without dead ends: 147 [2018-11-06 22:53:51,405 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2259, Invalid=6483, Unknown=0, NotChecked=0, Total=8742 [2018-11-06 22:53:51,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-11-06 22:53:51,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-11-06 22:53:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-11-06 22:53:51,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-11-06 22:53:51,411 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 137 [2018-11-06 22:53:51,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:51,411 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-11-06 22:53:51,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-11-06 22:53:51,411 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-11-06 22:53:51,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-11-06 22:53:51,412 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:51,412 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:51,412 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:51,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:51,413 INFO L82 PathProgramCache]: Analyzing trace with hash -899199951, now seen corresponding path program 16 times [2018-11-06 22:53:51,413 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:51,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:51,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:51,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:51,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:53,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:53,104 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:53:53,112 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:53:53,168 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:53:53,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:53,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:53,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:53,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 52 [2018-11-06 22:53:53,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-06 22:53:53,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-06 22:53:53,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2546, Unknown=0, NotChecked=0, Total=2652 [2018-11-06 22:53:53,421 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 52 states. [2018-11-06 22:53:53,606 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 8 [2018-11-06 22:53:53,830 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2018-11-06 22:53:53,997 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-11-06 22:53:54,182 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-11-06 22:53:54,313 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-11-06 22:53:54,477 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-11-06 22:53:54,654 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-11-06 22:53:54,806 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-11-06 22:53:55,084 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2018-11-06 22:53:55,408 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 11 [2018-11-06 22:53:55,580 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 11 [2018-11-06 22:53:59,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:59,693 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2018-11-06 22:53:59,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-06 22:53:59,699 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 146 [2018-11-06 22:53:59,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:59,700 INFO L225 Difference]: With dead ends: 160 [2018-11-06 22:53:59,700 INFO L226 Difference]: Without dead ends: 156 [2018-11-06 22:53:59,702 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=2553, Invalid=7347, Unknown=0, NotChecked=0, Total=9900 [2018-11-06 22:53:59,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-11-06 22:53:59,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-11-06 22:53:59,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-11-06 22:53:59,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-11-06 22:53:59,708 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 146 [2018-11-06 22:53:59,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:59,708 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-11-06 22:53:59,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-06 22:53:59,708 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-11-06 22:53:59,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-11-06 22:53:59,709 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:59,709 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:59,710 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:59,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:59,710 INFO L82 PathProgramCache]: Analyzing trace with hash -185856020, now seen corresponding path program 17 times [2018-11-06 22:53:59,710 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:59,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:59,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:59,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:59,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:02,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:54:02,287 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:54:02,301 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:54:02,445 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2018-11-06 22:54:02,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:02,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:02,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:54:02,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 55 [2018-11-06 22:54:02,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-11-06 22:54:02,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-11-06 22:54:02,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2858, Unknown=0, NotChecked=0, Total=2970 [2018-11-06 22:54:02,732 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 55 states. [2018-11-06 22:54:02,907 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 8 [2018-11-06 22:54:03,062 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 8 [2018-11-06 22:54:03,178 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 9 [2018-11-06 22:54:03,330 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-11-06 22:54:03,490 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-11-06 22:54:03,668 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-11-06 22:54:03,840 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-11-06 22:54:03,989 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-11-06 22:54:04,165 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-11-06 22:54:04,342 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-11-06 22:54:04,522 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-11-06 22:54:04,702 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-11-06 22:54:05,816 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 11 [2018-11-06 22:54:10,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:10,049 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2018-11-06 22:54:10,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-11-06 22:54:10,049 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 155 [2018-11-06 22:54:10,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:10,051 INFO L225 Difference]: With dead ends: 169 [2018-11-06 22:54:10,051 INFO L226 Difference]: Without dead ends: 165 [2018-11-06 22:54:10,053 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2865, Invalid=8265, Unknown=0, NotChecked=0, Total=11130 [2018-11-06 22:54:10,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-11-06 22:54:10,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-11-06 22:54:10,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-11-06 22:54:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-11-06 22:54:10,058 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 155 [2018-11-06 22:54:10,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:10,058 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-11-06 22:54:10,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-11-06 22:54:10,059 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-11-06 22:54:10,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-11-06 22:54:10,060 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:10,060 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 52, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:10,060 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:10,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:10,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1044885871, now seen corresponding path program 18 times [2018-11-06 22:54:10,060 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:10,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:10,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:10,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:10,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:12,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:54:12,398 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:54:12,406 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:54:12,463 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 53 check-sat command(s) [2018-11-06 22:54:12,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:12,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:12,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:54:12,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 58 [2018-11-06 22:54:12,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-11-06 22:54:12,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-11-06 22:54:12,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=3188, Unknown=0, NotChecked=0, Total=3306 [2018-11-06 22:54:12,745 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 58 states. [2018-11-06 22:54:12,916 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 8 [2018-11-06 22:54:13,042 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 8 [2018-11-06 22:54:13,180 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2018-11-06 22:54:13,349 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-11-06 22:54:13,487 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-11-06 22:54:13,676 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-11-06 22:54:13,842 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-11-06 22:54:14,045 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-11-06 22:54:14,240 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-11-06 22:54:14,409 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-11-06 22:54:14,585 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-11-06 22:54:14,913 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-11-06 22:54:15,111 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-11-06 22:54:15,603 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2018-11-06 22:54:15,803 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 11 [2018-11-06 22:54:21,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:21,107 INFO L93 Difference]: Finished difference Result 178 states and 180 transitions. [2018-11-06 22:54:21,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-11-06 22:54:21,107 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 164 [2018-11-06 22:54:21,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:21,108 INFO L225 Difference]: With dead ends: 178 [2018-11-06 22:54:21,108 INFO L226 Difference]: Without dead ends: 174 [2018-11-06 22:54:21,109 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3195, Invalid=9237, Unknown=0, NotChecked=0, Total=12432 [2018-11-06 22:54:21,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-11-06 22:54:21,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-11-06 22:54:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-11-06 22:54:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-11-06 22:54:21,116 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 164 [2018-11-06 22:54:21,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:21,117 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-11-06 22:54:21,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-11-06 22:54:21,117 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-11-06 22:54:21,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-11-06 22:54:21,118 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:21,118 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 55, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:21,118 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:21,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:21,119 INFO L82 PathProgramCache]: Analyzing trace with hash -685262452, now seen corresponding path program 19 times [2018-11-06 22:54:21,119 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:21,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:21,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:21,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:21,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:23,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:54:23,792 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:54:23,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:24,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:24,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:54:24,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 61 [2018-11-06 22:54:24,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-11-06 22:54:24,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-11-06 22:54:24,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3536, Unknown=0, NotChecked=0, Total=3660 [2018-11-06 22:54:24,369 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 61 states. [2018-11-06 22:54:24,644 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 8 [2018-11-06 22:54:24,819 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 8 [2018-11-06 22:54:25,003 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 9 [2018-11-06 22:54:25,191 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-11-06 22:54:25,388 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-11-06 22:54:25,583 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-11-06 22:54:25,799 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-11-06 22:54:25,985 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-11-06 22:54:26,197 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-11-06 22:54:26,409 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-11-06 22:54:26,598 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-11-06 22:54:26,785 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-11-06 22:54:26,979 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-11-06 22:54:27,184 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-11-06 22:54:27,540 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-11-06 22:54:27,752 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-11-06 22:54:27,943 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-11-06 22:54:28,135 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 11 [2018-11-06 22:54:28,327 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2018-11-06 22:54:34,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:34,073 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2018-11-06 22:54:34,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-11-06 22:54:34,073 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 173 [2018-11-06 22:54:34,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:34,075 INFO L225 Difference]: With dead ends: 187 [2018-11-06 22:54:34,075 INFO L226 Difference]: Without dead ends: 183 [2018-11-06 22:54:34,077 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=3543, Invalid=10263, Unknown=0, NotChecked=0, Total=13806 [2018-11-06 22:54:34,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-11-06 22:54:34,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-11-06 22:54:34,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-11-06 22:54:34,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-11-06 22:54:34,084 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 173 [2018-11-06 22:54:34,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:34,085 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-11-06 22:54:34,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-11-06 22:54:34,085 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-11-06 22:54:34,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-11-06 22:54:34,086 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:34,086 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 58, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:34,086 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:34,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:34,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1534163185, now seen corresponding path program 20 times [2018-11-06 22:54:34,087 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:34,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:34,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:34,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:54:34,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:36,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:54:36,875 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:54:36,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:54:37,108 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:54:37,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:37,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:37,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:54:37,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 64 [2018-11-06 22:54:37,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-11-06 22:54:37,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-11-06 22:54:37,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=3902, Unknown=0, NotChecked=0, Total=4032 [2018-11-06 22:54:37,492 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 64 states. [2018-11-06 22:54:37,742 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 8 [2018-11-06 22:54:37,959 WARN L179 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 8 [2018-11-06 22:54:38,146 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2018-11-06 22:54:38,304 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-11-06 22:54:38,513 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-11-06 22:54:38,713 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-11-06 22:54:38,889 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-11-06 22:54:39,113 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-11-06 22:54:39,289 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-11-06 22:54:39,467 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-11-06 22:54:39,697 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-11-06 22:54:39,893 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-11-06 22:54:40,095 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-11-06 22:54:40,302 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-11-06 22:54:40,495 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-11-06 22:54:40,702 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-11-06 22:54:40,905 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-11-06 22:54:41,110 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-11-06 22:54:41,319 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-11-06 22:54:41,529 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-11-06 22:54:41,763 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-11-06 22:54:48,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:48,335 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2018-11-06 22:54:48,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-11-06 22:54:48,338 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 182 [2018-11-06 22:54:48,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:48,340 INFO L225 Difference]: With dead ends: 196 [2018-11-06 22:54:48,340 INFO L226 Difference]: Without dead ends: 192 [2018-11-06 22:54:48,341 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=3909, Invalid=11343, Unknown=0, NotChecked=0, Total=15252 [2018-11-06 22:54:48,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-11-06 22:54:48,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-11-06 22:54:48,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-11-06 22:54:48,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2018-11-06 22:54:48,347 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 182 [2018-11-06 22:54:48,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:48,347 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2018-11-06 22:54:48,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-11-06 22:54:48,347 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2018-11-06 22:54:48,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-11-06 22:54:48,348 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:48,348 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 61, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:48,349 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:48,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:48,349 INFO L82 PathProgramCache]: Analyzing trace with hash -978830548, now seen corresponding path program 21 times [2018-11-06 22:54:48,349 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:48,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:48,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:48,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:48,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:51,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:54:51,339 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:54:51,348 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:54:51,420 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 62 check-sat command(s) [2018-11-06 22:54:51,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:51,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:51,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:54:51,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 67 [2018-11-06 22:54:51,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-11-06 22:54:51,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-11-06 22:54:51,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4286, Unknown=0, NotChecked=0, Total=4422 [2018-11-06 22:54:51,949 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 67 states. [2018-11-06 22:54:52,153 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2018-11-06 22:54:52,320 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 8 [2018-11-06 22:54:52,505 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 9 [2018-11-06 22:54:52,684 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-11-06 22:54:52,890 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-11-06 22:54:53,054 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-11-06 22:54:53,223 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-11-06 22:54:53,409 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-11-06 22:54:53,604 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-11-06 22:54:53,806 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-11-06 22:54:53,995 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-11-06 22:54:54,231 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-11-06 22:54:54,430 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-11-06 22:54:54,662 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-11-06 22:54:54,895 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-11-06 22:54:55,094 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-11-06 22:54:55,306 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-11-06 22:54:55,520 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-11-06 22:54:55,728 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-11-06 22:54:55,961 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-11-06 22:54:56,205 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-11-06 22:54:56,449 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-11-06 22:54:56,671 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-11-06 22:54:56,949 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-11-06 22:54:57,295 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 11 [2018-11-06 22:54:57,521 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2018-11-06 22:54:57,955 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 11 [2018-11-06 22:55:02,313 WARN L179 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 11 [2018-11-06 22:55:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:05,068 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2018-11-06 22:55:05,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-11-06 22:55:05,069 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 191 [2018-11-06 22:55:05,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:05,070 INFO L225 Difference]: With dead ends: 205 [2018-11-06 22:55:05,070 INFO L226 Difference]: Without dead ends: 201 [2018-11-06 22:55:05,071 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=4293, Invalid=12477, Unknown=0, NotChecked=0, Total=16770 [2018-11-06 22:55:05,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-11-06 22:55:05,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-11-06 22:55:05,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-11-06 22:55:05,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-11-06 22:55:05,077 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 191 [2018-11-06 22:55:05,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:05,078 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-11-06 22:55:05,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-11-06 22:55:05,078 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-11-06 22:55:05,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-11-06 22:55:05,078 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:05,079 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 64, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:05,079 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:05,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:05,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1826147153, now seen corresponding path program 22 times [2018-11-06 22:55:05,079 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:05,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:05,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:05,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:05,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:55:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:08,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:55:08,702 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:55:08,711 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:55:08,905 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:55:08,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:08,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:09,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:55:09,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2018-11-06 22:55:09,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-11-06 22:55:09,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-11-06 22:55:09,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=4688, Unknown=0, NotChecked=0, Total=4830 [2018-11-06 22:55:09,338 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 70 states. [2018-11-06 22:55:09,566 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 8 [2018-11-06 22:55:09,773 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 8 [2018-11-06 22:55:09,979 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2018-11-06 22:55:10,234 WARN L179 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-11-06 22:55:10,487 WARN L179 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-11-06 22:55:10,708 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-11-06 22:55:10,937 WARN L179 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-11-06 22:55:11,181 WARN L179 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-11-06 22:55:11,431 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-11-06 22:55:11,642 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-11-06 22:55:11,915 WARN L179 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-11-06 22:55:12,144 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-11-06 22:55:12,435 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-11-06 22:55:12,652 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-11-06 22:55:12,913 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-11-06 22:55:13,158 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-11-06 22:55:13,424 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-11-06 22:55:13,681 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-11-06 22:55:13,940 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-11-06 22:55:14,195 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-11-06 22:55:14,425 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-11-06 22:55:14,647 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-11-06 22:55:14,861 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-11-06 22:55:15,102 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-11-06 22:55:15,325 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-11-06 22:55:15,565 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-11-06 22:55:15,816 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-11-06 22:55:16,069 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 11 [2018-11-06 22:55:16,547 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 11 [2018-11-06 22:55:17,269 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 11 [2018-11-06 22:55:17,537 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 11 [2018-11-06 22:55:23,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:23,265 INFO L93 Difference]: Finished difference Result 214 states and 216 transitions. [2018-11-06 22:55:23,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-11-06 22:55:23,266 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 200 [2018-11-06 22:55:23,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:23,268 INFO L225 Difference]: With dead ends: 214 [2018-11-06 22:55:23,268 INFO L226 Difference]: Without dead ends: 210 [2018-11-06 22:55:23,269 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=4695, Invalid=13665, Unknown=0, NotChecked=0, Total=18360 [2018-11-06 22:55:23,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-11-06 22:55:23,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-11-06 22:55:23,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-11-06 22:55:23,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2018-11-06 22:55:23,277 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 200 [2018-11-06 22:55:23,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:23,277 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2018-11-06 22:55:23,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-11-06 22:55:23,278 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2018-11-06 22:55:23,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-11-06 22:55:23,279 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:23,279 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 67, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:23,279 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:23,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:23,279 INFO L82 PathProgramCache]: Analyzing trace with hash 2045220044, now seen corresponding path program 23 times [2018-11-06 22:55:23,280 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:23,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:23,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:23,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:23,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:55:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:26,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:55:26,728 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:55:26,743 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:55:27,098 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) [2018-11-06 22:55:27,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:27,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:28,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:55:28,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 73 [2018-11-06 22:55:28,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-11-06 22:55:28,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-11-06 22:55:28,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5108, Unknown=0, NotChecked=0, Total=5256 [2018-11-06 22:55:28,685 INFO L87 Difference]: Start difference. First operand 210 states and 210 transitions. Second operand 73 states. [2018-11-06 22:55:29,007 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 8 [2018-11-06 22:55:29,205 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 8 [2018-11-06 22:55:29,453 WARN L179 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 9 [2018-11-06 22:55:29,720 WARN L179 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-11-06 22:55:30,021 WARN L179 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-11-06 22:55:30,241 WARN L179 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-11-06 22:55:30,518 WARN L179 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-11-06 22:55:30,763 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-11-06 22:55:31,003 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-11-06 22:55:31,247 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-11-06 22:55:31,463 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-11-06 22:55:31,691 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-11-06 22:55:31,961 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-11-06 22:55:32,220 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-11-06 22:55:32,500 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-11-06 22:55:32,777 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-11-06 22:55:33,053 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-11-06 22:55:33,324 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-11-06 22:55:33,582 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-11-06 22:55:33,825 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-11-06 22:55:34,101 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-11-06 22:55:34,325 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-11-06 22:55:34,560 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-11-06 22:55:34,800 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-11-06 22:55:35,064 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-11-06 22:55:35,336 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-11-06 22:55:35,587 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-11-06 22:55:36,082 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-11-06 22:55:37,737 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 11 [2018-11-06 22:55:43,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:55:43,990 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2018-11-06 22:55:43,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-11-06 22:55:43,990 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 209 [2018-11-06 22:55:43,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:55:43,992 INFO L225 Difference]: With dead ends: 223 [2018-11-06 22:55:43,992 INFO L226 Difference]: Without dead ends: 219 [2018-11-06 22:55:43,994 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=5115, Invalid=14907, Unknown=0, NotChecked=0, Total=20022 [2018-11-06 22:55:43,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-11-06 22:55:44,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-11-06 22:55:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-11-06 22:55:44,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-11-06 22:55:44,002 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 209 [2018-11-06 22:55:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:55:44,002 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-11-06 22:55:44,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-11-06 22:55:44,002 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-11-06 22:55:44,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-11-06 22:55:44,003 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:55:44,004 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 70, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:55:44,004 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:55:44,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:55:44,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1169442225, now seen corresponding path program 24 times [2018-11-06 22:55:44,004 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:55:44,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:55:44,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:44,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:55:44,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:55:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:55:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:48,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:55:48,139 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:55:48,148 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:55:48,342 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 71 check-sat command(s) [2018-11-06 22:55:48,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:55:48,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:55:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:55:48,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:55:48,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 76 [2018-11-06 22:55:48,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-11-06 22:55:48,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-11-06 22:55:48,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=5546, Unknown=0, NotChecked=0, Total=5700 [2018-11-06 22:55:48,706 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 76 states. [2018-11-06 22:55:49,021 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 8 [2018-11-06 22:55:49,284 WARN L179 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 8 [2018-11-06 22:55:49,520 WARN L179 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2018-11-06 22:55:49,740 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-11-06 22:55:50,056 WARN L179 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-11-06 22:55:50,339 WARN L179 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-11-06 22:55:50,604 WARN L179 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-11-06 22:55:50,890 WARN L179 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-11-06 22:55:51,197 WARN L179 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-11-06 22:55:51,463 WARN L179 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-11-06 22:55:51,764 WARN L179 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-11-06 22:55:52,046 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-11-06 22:55:52,330 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-11-06 22:55:52,638 WARN L179 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-11-06 22:55:52,914 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-11-06 22:55:53,181 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-11-06 22:55:53,435 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-11-06 22:55:53,726 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-11-06 22:55:54,020 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-11-06 22:55:54,299 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-11-06 22:55:54,582 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-11-06 22:55:54,867 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-11-06 22:55:55,167 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-11-06 22:55:55,418 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-11-06 22:55:55,694 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-11-06 22:55:55,935 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-11-06 22:55:56,180 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-11-06 22:55:56,449 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-11-06 22:55:56,716 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-11-06 22:55:57,016 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-11-06 22:55:57,296 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-11-06 22:55:57,835 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-11-06 22:55:58,407 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 11 [2018-11-06 22:55:58,686 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 11 [2018-11-06 22:55:58,956 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 11 [2018-11-06 22:55:59,472 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 11 [2018-11-06 22:56:05,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:05,870 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2018-11-06 22:56:05,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-11-06 22:56:05,870 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 218 [2018-11-06 22:56:05,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:05,872 INFO L225 Difference]: With dead ends: 232 [2018-11-06 22:56:05,872 INFO L226 Difference]: Without dead ends: 228 [2018-11-06 22:56:05,873 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=5553, Invalid=16203, Unknown=0, NotChecked=0, Total=21756 [2018-11-06 22:56:05,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-11-06 22:56:05,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-11-06 22:56:05,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-11-06 22:56:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2018-11-06 22:56:05,881 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 218 [2018-11-06 22:56:05,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:05,882 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2018-11-06 22:56:05,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-11-06 22:56:05,882 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2018-11-06 22:56:05,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-11-06 22:56:05,883 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:05,883 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 73, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:05,884 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:05,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:05,884 INFO L82 PathProgramCache]: Analyzing trace with hash 48219756, now seen corresponding path program 25 times [2018-11-06 22:56:05,884 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:05,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:05,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:05,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:05,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:56:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:10,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:56:10,005 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:56:10,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:56:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:56:10,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:11,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:56:11,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 79 [2018-11-06 22:56:11,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-11-06 22:56:11,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-11-06 22:56:11,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=6002, Unknown=0, NotChecked=0, Total=6162 [2018-11-06 22:56:11,116 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 79 states. [2018-11-06 22:56:11,431 WARN L179 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 8 [2018-11-06 22:56:11,707 WARN L179 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 8 [2018-11-06 22:56:11,966 WARN L179 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 9 [2018-11-06 22:56:12,244 WARN L179 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-11-06 22:56:12,573 WARN L179 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-11-06 22:56:12,867 WARN L179 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-11-06 22:56:13,124 WARN L179 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-11-06 22:56:13,402 WARN L179 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-11-06 22:56:13,720 WARN L179 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-11-06 22:56:14,052 WARN L179 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-11-06 22:56:14,358 WARN L179 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-11-06 22:56:14,662 WARN L179 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-11-06 22:56:14,938 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-11-06 22:56:15,216 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-11-06 22:56:15,491 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-11-06 22:56:15,800 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-11-06 22:56:16,089 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-11-06 22:56:16,351 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-11-06 22:56:16,634 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-11-06 22:56:16,938 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-11-06 22:56:17,261 WARN L179 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-11-06 22:56:17,542 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-11-06 22:56:17,824 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-11-06 22:56:18,139 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-11-06 22:56:18,421 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-11-06 22:56:18,736 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-11-06 22:56:19,047 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-11-06 22:56:19,338 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-11-06 22:56:19,619 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-11-06 22:56:19,907 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-11-06 22:56:20,190 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-11-06 22:56:20,492 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-11-06 22:56:20,796 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-11-06 22:56:21,075 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-11-06 22:56:21,642 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-11-06 22:56:21,940 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 11 [2018-11-06 22:56:22,776 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 11 [2018-11-06 22:56:23,063 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 11 [2018-11-06 22:56:23,863 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 11 [2018-11-06 22:56:30,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:30,541 INFO L93 Difference]: Finished difference Result 241 states and 243 transitions. [2018-11-06 22:56:30,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-11-06 22:56:30,541 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 227 [2018-11-06 22:56:30,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:30,546 INFO L225 Difference]: With dead ends: 241 [2018-11-06 22:56:30,546 INFO L226 Difference]: Without dead ends: 237 [2018-11-06 22:56:30,548 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=6009, Invalid=17553, Unknown=0, NotChecked=0, Total=23562 [2018-11-06 22:56:30,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-11-06 22:56:30,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-11-06 22:56:30,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-11-06 22:56:30,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2018-11-06 22:56:30,557 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 227 [2018-11-06 22:56:30,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:30,557 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2018-11-06 22:56:30,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-11-06 22:56:30,557 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2018-11-06 22:56:30,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-11-06 22:56:30,559 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:30,559 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 76, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:30,559 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:30,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:30,559 INFO L82 PathProgramCache]: Analyzing trace with hash 273278993, now seen corresponding path program 26 times [2018-11-06 22:56:30,560 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:30,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:30,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:30,560 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:56:30,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:56:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:35,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:56:35,753 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:56:35,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:56:36,295 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:56:36,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:36,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:36,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:56:36,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 82 [2018-11-06 22:56:36,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-11-06 22:56:36,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-11-06 22:56:36,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=6476, Unknown=0, NotChecked=0, Total=6642 [2018-11-06 22:56:36,919 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 82 states. [2018-11-06 22:56:37,271 WARN L179 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 8 [2018-11-06 22:56:37,567 WARN L179 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 8 [2018-11-06 22:56:37,844 WARN L179 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 9 [2018-11-06 22:56:38,150 WARN L179 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-11-06 22:56:38,463 WARN L179 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-11-06 22:56:38,792 WARN L179 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-11-06 22:56:39,111 WARN L179 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-11-06 22:56:39,447 WARN L179 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-11-06 22:56:39,711 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-11-06 22:56:39,974 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-11-06 22:56:40,322 WARN L179 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-11-06 22:56:40,622 WARN L179 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-11-06 22:56:40,924 WARN L179 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-11-06 22:56:41,249 WARN L179 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-11-06 22:56:41,544 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-11-06 22:56:41,855 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-11-06 22:56:42,219 WARN L179 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-11-06 22:56:42,520 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-11-06 22:56:42,831 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-11-06 22:56:43,157 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-11-06 22:56:43,483 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-11-06 22:56:43,819 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-11-06 22:56:44,159 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-11-06 22:56:44,538 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-11-06 22:56:44,870 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-11-06 22:56:45,170 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-11-06 22:56:45,511 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-11-06 22:56:45,852 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-11-06 22:56:46,145 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-11-06 22:56:46,435 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-11-06 22:56:46,752 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-11-06 22:56:47,042 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-11-06 22:56:47,363 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-11-06 22:56:47,685 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-11-06 22:56:48,000 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-11-06 22:56:48,309 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-11-06 22:56:48,613 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-11-06 22:56:48,911 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-11-06 22:56:49,205 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 11 [2018-11-06 22:56:50,388 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 11 [2018-11-06 22:56:57,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:58,000 INFO L93 Difference]: Finished difference Result 250 states and 252 transitions. [2018-11-06 22:56:58,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-11-06 22:56:58,000 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 236 [2018-11-06 22:56:58,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:58,002 INFO L225 Difference]: With dead ends: 250 [2018-11-06 22:56:58,002 INFO L226 Difference]: Without dead ends: 246 [2018-11-06 22:56:58,004 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=6483, Invalid=18957, Unknown=0, NotChecked=0, Total=25440 [2018-11-06 22:56:58,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-11-06 22:56:58,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-11-06 22:56:58,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-11-06 22:56:58,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 246 transitions. [2018-11-06 22:56:58,012 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 246 transitions. Word has length 236 [2018-11-06 22:56:58,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:58,013 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 246 transitions. [2018-11-06 22:56:58,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-11-06 22:56:58,013 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 246 transitions. [2018-11-06 22:56:58,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-11-06 22:56:58,014 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:58,014 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 79, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:58,015 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:58,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:58,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1695207436, now seen corresponding path program 27 times [2018-11-06 22:56:58,015 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:58,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:58,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:58,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:58,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:04,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:57:04,537 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:57:04,547 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:57:04,656 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 80 check-sat command(s) [2018-11-06 22:57:04,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:04,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:05,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:57:05,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 85 [2018-11-06 22:57:05,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-11-06 22:57:05,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-11-06 22:57:05,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=6968, Unknown=0, NotChecked=0, Total=7140 [2018-11-06 22:57:05,998 INFO L87 Difference]: Start difference. First operand 246 states and 246 transitions. Second operand 85 states. [2018-11-06 22:57:06,398 WARN L179 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 8 [2018-11-06 22:57:06,732 WARN L179 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 8 [2018-11-06 22:57:07,094 WARN L179 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 9 [2018-11-06 22:57:07,449 WARN L179 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-11-06 22:57:07,840 WARN L179 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-11-06 22:57:08,184 WARN L179 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-11-06 22:57:08,536 WARN L179 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-11-06 22:57:08,867 WARN L179 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-11-06 22:57:09,235 WARN L179 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-11-06 22:57:09,604 WARN L179 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-11-06 22:57:09,970 WARN L179 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 Received shutdown request... [2018-11-06 22:57:10,314 WARN L187 SmtUtils]: Removed 7 from assertion stack [2018-11-06 22:57:10,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-06 22:57:10,314 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-06 22:57:10,320 WARN L205 ceAbstractionStarter]: Timeout [2018-11-06 22:57:10,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:57:10 BoogieIcfgContainer [2018-11-06 22:57:10,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-06 22:57:10,321 INFO L168 Benchmark]: Toolchain (without parser) took 250598.16 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 685.8 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -711.7 MB). Peak memory consumption was 564.4 MB. Max. memory is 7.1 GB. [2018-11-06 22:57:10,321 INFO L168 Benchmark]: CDTParser took 0.91 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. [2018-11-06 22:57:10,322 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.22 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. [2018-11-06 22:57:10,322 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.27 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. [2018-11-06 22:57:10,322 INFO L168 Benchmark]: Boogie Preprocessor took 16.53 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. [2018-11-06 22:57:10,322 INFO L168 Benchmark]: RCFGBuilder took 331.58 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 728.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -781.6 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. [2018-11-06 22:57:10,323 INFO L168 Benchmark]: TraceAbstraction took 249905.37 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -43.0 MB). Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 59.3 MB). Peak memory consumption was 606.8 MB. Max. memory is 7.1 GB. [2018-11-06 22:57:10,324 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.91 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 311.22 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 29.27 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 16.53 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 331.58 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 728.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -781.6 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 249905.37 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -43.0 MB). Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 59.3 MB). Peak memory consumption was 606.8 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 constructing difference of abstraction (246states) and FLOYD_HOARE automaton (currently 13 states, 85 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 221. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. TIMEOUT Result, 249.8s OverallTime, 29 OverallIterations, 80 TraceHistogramMax, 180.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 269 SDtfs, 3873 SDslu, 4613 SDs, 0 SdLazy, 6028 SolverSat, 2474 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5678 GetRequests, 3424 SyntacticMatches, 0 SemanticMatches, 2253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28519 ImplicationChecksByTransitivity, 226.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=246occurred in iteration=28, 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: 0.2s AutomataMinimizationTime, 28 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 6.6s SatisfiabilityAnalysisTime, 60.4s InterpolantComputationTime, 6927 NumberOfCodeBlocks, 6927 NumberOfCodeBlocksAsserted, 612 NumberOfCheckSat, 6871 ConstructedInterpolants, 0 QuantifiedInterpolants, 5566483 SizeOfPredicates, 54 NumberOfNonLiveVariables, 4806 ConjunctsInSsa, 1161 ConjunctsInUnsatCore, 56 InterpolantComputations, 2 PerfectInterpolantSequences, 0/174906 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown