java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/down_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 11:56:02,889 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 11:56:02,891 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 11:56:02,909 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 11:56:02,910 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 11:56:02,911 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 11:56:02,913 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 11:56:02,915 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 11:56:02,918 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 11:56:02,921 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 11:56:02,924 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 11:56:02,924 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 11:56:02,925 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 11:56:02,926 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 11:56:02,929 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 11:56:02,930 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 11:56:02,931 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 11:56:02,941 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 11:56:02,946 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 11:56:02,948 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 11:56:02,949 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 11:56:02,950 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 11:56:02,955 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 11:56:02,970 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 11:56:02,998 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 11:56:02,998 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 11:56:03,000 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 11:56:03,000 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 11:56:03,000 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 11:56:03,001 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 11:56:03,001 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 11:56:03,001 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 11:56:03,001 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 11:56:03,002 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 11:56:03,002 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 11:56:03,003 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 11:56:03,003 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 11:56:03,003 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 11:56:03,003 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 11:56:03,003 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 11:56:03,004 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 11:56:03,004 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 11:56:03,004 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 11:56:03,004 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:56:03,004 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 11:56:03,006 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 11:56:03,006 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 11:56:03,006 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 11:56:03,006 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 11:56:03,006 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 11:56:03,007 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 11:56:03,007 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 11:56:03,064 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 11:56:03,081 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 11:56:03,085 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 11:56:03,087 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 11:56:03,087 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 11:56:03,088 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/down_true-unreach-call_true-termination.i [2018-10-24 11:56:03,150 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a940e026e/1444f4b734b546f69febc7430579ccb2/FLAG9e6c7d8da [2018-10-24 11:56:03,592 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 11:56:03,593 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/down_true-unreach-call_true-termination.i [2018-10-24 11:56:03,602 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a940e026e/1444f4b734b546f69febc7430579ccb2/FLAG9e6c7d8da [2018-10-24 11:56:03,619 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/a940e026e/1444f4b734b546f69febc7430579ccb2 [2018-10-24 11:56:03,631 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 11:56:03,633 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 11:56:03,634 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 11:56:03,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 11:56:03,638 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 11:56:03,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:56:03" (1/1) ... [2018-10-24 11:56:03,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f341465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:03, skipping insertion in model container [2018-10-24 11:56:03,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:56:03" (1/1) ... [2018-10-24 11:56:03,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 11:56:03,673 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 11:56:03,823 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:56:03,827 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 11:56:03,844 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:56:03,859 INFO L193 MainTranslator]: Completed translation [2018-10-24 11:56:03,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:03 WrapperNode [2018-10-24 11:56:03,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 11:56:03,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 11:56:03,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 11:56:03,861 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 11:56:03,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:03" (1/1) ... [2018-10-24 11:56:03,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:03" (1/1) ... [2018-10-24 11:56:03,893 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 11:56:03,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 11:56:03,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 11:56:03,894 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 11:56:03,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:03" (1/1) ... [2018-10-24 11:56:03,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:03" (1/1) ... [2018-10-24 11:56:03,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:03" (1/1) ... [2018-10-24 11:56:03,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:03" (1/1) ... [2018-10-24 11:56:03,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:03" (1/1) ... [2018-10-24 11:56:03,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:03" (1/1) ... [2018-10-24 11:56:03,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:03" (1/1) ... [2018-10-24 11:56:03,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 11:56:03,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 11:56:03,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 11:56:03,915 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 11:56:03,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:56:04,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 11:56:04,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 11:56:04,194 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 11:56:04,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:56:04 BoogieIcfgContainer [2018-10-24 11:56:04,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 11:56:04,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 11:56:04,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 11:56:04,200 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 11:56:04,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:56:03" (1/3) ... [2018-10-24 11:56:04,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa24a81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:56:04, skipping insertion in model container [2018-10-24 11:56:04,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:56:03" (2/3) ... [2018-10-24 11:56:04,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa24a81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:56:04, skipping insertion in model container [2018-10-24 11:56:04,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:56:04" (3/3) ... [2018-10-24 11:56:04,203 INFO L112 eAbstractionObserver]: Analyzing ICFG down_true-unreach-call_true-termination.i [2018-10-24 11:56:04,213 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 11:56:04,220 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 11:56:04,237 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 11:56:04,270 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 11:56:04,271 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 11:56:04,271 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 11:56:04,271 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 11:56:04,271 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 11:56:04,271 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 11:56:04,272 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 11:56:04,272 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 11:56:04,272 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 11:56:04,288 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-10-24 11:56:04,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-24 11:56:04,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:04,294 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:04,296 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:04,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:04,303 INFO L82 PathProgramCache]: Analyzing trace with hash 383759085, now seen corresponding path program 1 times [2018-10-24 11:56:04,305 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:04,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:04,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:04,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:04,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:04,412 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:56:04,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 11:56:04,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 11:56:04,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 11:56:04,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:56:04,435 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2018-10-24 11:56:04,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:04,452 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2018-10-24 11:56:04,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 11:56:04,458 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-10-24 11:56:04,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:04,474 INFO L225 Difference]: With dead ends: 26 [2018-10-24 11:56:04,474 INFO L226 Difference]: Without dead ends: 11 [2018-10-24 11:56:04,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:56:04,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-24 11:56:04,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-24 11:56:04,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-24 11:56:04,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-24 11:56:04,507 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-24 11:56:04,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:04,508 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-24 11:56:04,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 11:56:04,508 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-24 11:56:04,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-24 11:56:04,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:04,509 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:04,509 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:04,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:04,510 INFO L82 PathProgramCache]: Analyzing trace with hash 325884241, now seen corresponding path program 1 times [2018-10-24 11:56:04,510 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:04,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:04,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:04,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:04,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:04,715 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:56:04,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 11:56:04,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 11:56:04,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 11:56:04,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:56:04,724 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2018-10-24 11:56:04,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:04,865 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2018-10-24 11:56:04,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 11:56:04,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-10-24 11:56:04,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:04,866 INFO L225 Difference]: With dead ends: 22 [2018-10-24 11:56:04,867 INFO L226 Difference]: Without dead ends: 13 [2018-10-24 11:56:04,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:56:04,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-24 11:56:04,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-24 11:56:04,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-24 11:56:04,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-24 11:56:04,871 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-10-24 11:56:04,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:04,872 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-24 11:56:04,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 11:56:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-24 11:56:04,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-24 11:56:04,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:04,873 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:04,873 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:04,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:04,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1748104565, now seen corresponding path program 1 times [2018-10-24 11:56:04,874 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:04,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:04,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:04,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:04,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:04,947 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:56:04,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 11:56:04,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 11:56:04,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 11:56:04,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:56:04,950 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2018-10-24 11:56:05,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:05,156 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-24 11:56:05,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 11:56:05,156 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-24 11:56:05,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:05,157 INFO L225 Difference]: With dead ends: 25 [2018-10-24 11:56:05,157 INFO L226 Difference]: Without dead ends: 23 [2018-10-24 11:56:05,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:56:05,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-24 11:56:05,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-10-24 11:56:05,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-24 11:56:05,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-24 11:56:05,162 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2018-10-24 11:56:05,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:05,162 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-24 11:56:05,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 11:56:05,163 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-24 11:56:05,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-24 11:56:05,163 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:05,164 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:05,164 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:05,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:05,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1639575084, now seen corresponding path program 1 times [2018-10-24 11:56:05,165 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:05,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:05,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:05,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:05,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:05,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:05,381 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:05,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:05,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:05,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:05,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-24 11:56:05,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 11:56:05,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 11:56:05,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:56:05,468 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 7 states. [2018-10-24 11:56:05,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:05,628 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-10-24 11:56:05,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 11:56:05,628 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2018-10-24 11:56:05,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:05,629 INFO L225 Difference]: With dead ends: 31 [2018-10-24 11:56:05,630 INFO L226 Difference]: Without dead ends: 18 [2018-10-24 11:56:05,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:56:05,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-24 11:56:05,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-24 11:56:05,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-24 11:56:05,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-24 11:56:05,635 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2018-10-24 11:56:05,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:05,636 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-24 11:56:05,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 11:56:05,636 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-24 11:56:05,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-24 11:56:05,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:05,637 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:05,637 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:05,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:05,637 INFO L82 PathProgramCache]: Analyzing trace with hash 842542990, now seen corresponding path program 2 times [2018-10-24 11:56:05,637 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:05,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:05,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:05,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:05,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:05,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:05,902 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:05,911 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:56:05,931 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:56:05,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:05,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:05,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:05,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-10-24 11:56:05,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 11:56:05,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 11:56:05,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:56:05,978 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2018-10-24 11:56:06,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:06,150 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-10-24 11:56:06,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 11:56:06,150 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-10-24 11:56:06,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:06,151 INFO L225 Difference]: With dead ends: 31 [2018-10-24 11:56:06,151 INFO L226 Difference]: Without dead ends: 29 [2018-10-24 11:56:06,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:56:06,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-24 11:56:06,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-10-24 11:56:06,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-24 11:56:06,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-24 11:56:06,159 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2018-10-24 11:56:06,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:06,160 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-24 11:56:06,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 11:56:06,160 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-24 11:56:06,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-24 11:56:06,162 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:06,162 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:06,162 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:06,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:06,163 INFO L82 PathProgramCache]: Analyzing trace with hash -46138025, now seen corresponding path program 3 times [2018-10-24 11:56:06,163 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:06,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:06,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:06,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:06,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:06,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:06,563 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:06,571 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:56:06,589 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-24 11:56:06,589 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:06,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:06,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:06,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:06,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-24 11:56:06,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 11:56:06,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 11:56:06,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:56:06,625 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2018-10-24 11:56:06,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:06,776 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-10-24 11:56:06,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 11:56:06,776 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2018-10-24 11:56:06,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:06,777 INFO L225 Difference]: With dead ends: 41 [2018-10-24 11:56:06,777 INFO L226 Difference]: Without dead ends: 24 [2018-10-24 11:56:06,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:56:06,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-24 11:56:06,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-24 11:56:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-24 11:56:06,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-10-24 11:56:06,782 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2018-10-24 11:56:06,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:06,783 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-10-24 11:56:06,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 11:56:06,783 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-10-24 11:56:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-24 11:56:06,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:06,784 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:06,784 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:06,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:06,785 INFO L82 PathProgramCache]: Analyzing trace with hash -676370543, now seen corresponding path program 4 times [2018-10-24 11:56:06,785 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:06,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:06,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:06,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:06,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:06,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:06,941 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:06,956 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:56:06,976 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:56:06,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:06,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:07,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:07,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-24 11:56:07,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 11:56:07,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 11:56:07,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:56:07,021 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2018-10-24 11:56:07,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:07,184 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-24 11:56:07,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 11:56:07,184 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2018-10-24 11:56:07,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:07,186 INFO L225 Difference]: With dead ends: 37 [2018-10-24 11:56:07,186 INFO L226 Difference]: Without dead ends: 35 [2018-10-24 11:56:07,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:56:07,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-24 11:56:07,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-10-24 11:56:07,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-24 11:56:07,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-10-24 11:56:07,195 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2018-10-24 11:56:07,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:07,195 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-10-24 11:56:07,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 11:56:07,196 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-10-24 11:56:07,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-24 11:56:07,196 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:07,199 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:07,199 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:07,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:07,199 INFO L82 PathProgramCache]: Analyzing trace with hash 612727770, now seen corresponding path program 5 times [2018-10-24 11:56:07,199 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:07,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:07,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:07,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:07,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:07,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:07,515 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:07,523 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:56:07,563 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-24 11:56:07,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:07,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:07,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:07,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-24 11:56:07,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 11:56:07,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 11:56:07,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:56:07,597 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 11 states. [2018-10-24 11:56:07,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:07,792 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-10-24 11:56:07,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 11:56:07,793 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2018-10-24 11:56:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:07,794 INFO L225 Difference]: With dead ends: 51 [2018-10-24 11:56:07,795 INFO L226 Difference]: Without dead ends: 30 [2018-10-24 11:56:07,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:56:07,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-24 11:56:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-24 11:56:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-24 11:56:07,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-10-24 11:56:07,801 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2018-10-24 11:56:07,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:07,801 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-10-24 11:56:07,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 11:56:07,801 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-10-24 11:56:07,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-24 11:56:07,802 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:07,802 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:07,802 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:07,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:07,803 INFO L82 PathProgramCache]: Analyzing trace with hash -2140745068, now seen corresponding path program 6 times [2018-10-24 11:56:07,803 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:07,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:07,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:07,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:07,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:07,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:07,916 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:07,923 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:56:07,945 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-24 11:56:07,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:07,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:07,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:07,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-10-24 11:56:07,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 11:56:07,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 11:56:07,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:56:08,000 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-10-24 11:56:08,254 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-10-24 11:56:08,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:08,443 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-10-24 11:56:08,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 11:56:08,448 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2018-10-24 11:56:08,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:08,449 INFO L225 Difference]: With dead ends: 43 [2018-10-24 11:56:08,449 INFO L226 Difference]: Without dead ends: 41 [2018-10-24 11:56:08,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:56:08,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-24 11:56:08,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2018-10-24 11:56:08,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-24 11:56:08,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-10-24 11:56:08,456 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2018-10-24 11:56:08,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:08,457 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-10-24 11:56:08,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 11:56:08,457 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-10-24 11:56:08,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-24 11:56:08,458 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:08,458 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:08,458 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:08,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:08,459 INFO L82 PathProgramCache]: Analyzing trace with hash 2109320541, now seen corresponding path program 7 times [2018-10-24 11:56:08,459 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:08,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:08,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:08,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:08,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:08,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:08,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:08,646 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:08,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:08,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:08,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:08,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-24 11:56:08,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 11:56:08,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 11:56:08,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:56:08,709 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2018-10-24 11:56:08,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:08,878 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2018-10-24 11:56:08,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 11:56:08,878 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2018-10-24 11:56:08,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:08,879 INFO L225 Difference]: With dead ends: 61 [2018-10-24 11:56:08,879 INFO L226 Difference]: Without dead ends: 36 [2018-10-24 11:56:08,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2018-10-24 11:56:08,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-24 11:56:08,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-24 11:56:08,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-24 11:56:08,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-24 11:56:08,886 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2018-10-24 11:56:08,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:08,886 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-24 11:56:08,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 11:56:08,886 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-24 11:56:08,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-24 11:56:08,887 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:08,887 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:08,887 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:08,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:08,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1946783895, now seen corresponding path program 8 times [2018-10-24 11:56:08,888 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:08,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:08,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:08,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:08,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:09,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:09,082 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-24 11:56:09,097 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:09,127 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:56:09,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:09,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:09,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:09,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-24 11:56:09,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 11:56:09,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 11:56:09,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:56:09,199 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 11 states. [2018-10-24 11:56:09,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:09,412 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-24 11:56:09,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 11:56:09,412 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2018-10-24 11:56:09,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:09,413 INFO L225 Difference]: With dead ends: 49 [2018-10-24 11:56:09,413 INFO L226 Difference]: Without dead ends: 47 [2018-10-24 11:56:09,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:56:09,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-24 11:56:09,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2018-10-24 11:56:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-24 11:56:09,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-10-24 11:56:09,421 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2018-10-24 11:56:09,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:09,422 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-10-24 11:56:09,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 11:56:09,422 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-10-24 11:56:09,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-24 11:56:09,423 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:09,423 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:09,423 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:09,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:09,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1173860832, now seen corresponding path program 9 times [2018-10-24 11:56:09,424 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:09,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:09,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:09,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:09,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:09,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:09,596 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:09,610 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:56:09,711 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-24 11:56:09,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:09,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:09,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:09,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-24 11:56:09,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 11:56:09,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 11:56:09,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2018-10-24 11:56:09,763 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 15 states. [2018-10-24 11:56:10,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:10,279 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-10-24 11:56:10,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 11:56:10,279 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2018-10-24 11:56:10,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:10,281 INFO L225 Difference]: With dead ends: 71 [2018-10-24 11:56:10,281 INFO L226 Difference]: Without dead ends: 42 [2018-10-24 11:56:10,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:56:10,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-24 11:56:10,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-24 11:56:10,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-24 11:56:10,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-10-24 11:56:10,289 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2018-10-24 11:56:10,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:10,289 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-10-24 11:56:10,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-24 11:56:10,290 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-10-24 11:56:10,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-24 11:56:10,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:10,291 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:10,291 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:10,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:10,291 INFO L82 PathProgramCache]: Analyzing trace with hash 666550682, now seen corresponding path program 10 times [2018-10-24 11:56:10,291 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:10,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:10,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:10,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:10,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:10,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:10,453 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:10,461 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:56:10,500 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:56:10,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:10,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:10,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:10,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-24 11:56:10,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 11:56:10,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 11:56:10,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:56:10,645 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 12 states. [2018-10-24 11:56:11,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:11,131 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-10-24 11:56:11,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 11:56:11,131 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2018-10-24 11:56:11,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:11,132 INFO L225 Difference]: With dead ends: 55 [2018-10-24 11:56:11,133 INFO L226 Difference]: Without dead ends: 53 [2018-10-24 11:56:11,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:56:11,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-24 11:56:11,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2018-10-24 11:56:11,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-24 11:56:11,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-10-24 11:56:11,142 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2018-10-24 11:56:11,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:11,142 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-10-24 11:56:11,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 11:56:11,143 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-10-24 11:56:11,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-24 11:56:11,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:11,144 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:11,144 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:11,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:11,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1808968035, now seen corresponding path program 11 times [2018-10-24 11:56:11,144 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:11,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:11,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:11,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:11,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:11,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:11,323 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:11,330 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:56:11,393 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-24 11:56:11,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:11,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:11,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:11,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-24 11:56:11,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-24 11:56:11,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-24 11:56:11,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2018-10-24 11:56:11,449 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 17 states. [2018-10-24 11:56:11,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:11,916 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-10-24 11:56:11,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-24 11:56:11,916 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2018-10-24 11:56:11,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:11,917 INFO L225 Difference]: With dead ends: 81 [2018-10-24 11:56:11,917 INFO L226 Difference]: Without dead ends: 48 [2018-10-24 11:56:11,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2018-10-24 11:56:11,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-24 11:56:11,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-24 11:56:11,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-24 11:56:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-10-24 11:56:11,926 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2018-10-24 11:56:11,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:11,926 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-10-24 11:56:11,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-24 11:56:11,926 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-10-24 11:56:11,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-24 11:56:11,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:11,927 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:11,928 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:11,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:11,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1676311139, now seen corresponding path program 12 times [2018-10-24 11:56:11,928 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:11,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:11,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:11,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:11,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:12,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:12,084 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:12,092 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:56:12,143 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-24 11:56:12,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:12,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:12,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:12,190 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-24 11:56:12,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 11:56:12,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 11:56:12,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:56:12,191 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 13 states. [2018-10-24 11:56:12,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:12,418 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-24 11:56:12,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 11:56:12,419 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2018-10-24 11:56:12,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:12,420 INFO L225 Difference]: With dead ends: 61 [2018-10-24 11:56:12,420 INFO L226 Difference]: Without dead ends: 59 [2018-10-24 11:56:12,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:56:12,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-24 11:56:12,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2018-10-24 11:56:12,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-24 11:56:12,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-10-24 11:56:12,431 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2018-10-24 11:56:12,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:12,432 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-10-24 11:56:12,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 11:56:12,432 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-10-24 11:56:12,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-24 11:56:12,433 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:12,433 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:12,433 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:12,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:12,433 INFO L82 PathProgramCache]: Analyzing trace with hash -313150490, now seen corresponding path program 13 times [2018-10-24 11:56:12,434 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:12,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:12,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:12,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:12,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:12,870 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:12,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:12,870 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:12,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:12,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:12,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:12,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-24 11:56:12,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-24 11:56:12,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-24 11:56:12,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2018-10-24 11:56:12,973 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 19 states. [2018-10-24 11:56:13,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:13,648 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-10-24 11:56:13,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 11:56:13,648 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2018-10-24 11:56:13,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:13,649 INFO L225 Difference]: With dead ends: 91 [2018-10-24 11:56:13,649 INFO L226 Difference]: Without dead ends: 54 [2018-10-24 11:56:13,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:56:13,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-24 11:56:13,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-24 11:56:13,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-24 11:56:13,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-10-24 11:56:13,657 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2018-10-24 11:56:13,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:13,657 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-10-24 11:56:13,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-24 11:56:13,658 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-10-24 11:56:13,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-24 11:56:13,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:13,659 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:13,659 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:13,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:13,659 INFO L82 PathProgramCache]: Analyzing trace with hash 992804000, now seen corresponding path program 14 times [2018-10-24 11:56:13,659 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:13,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:13,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:13,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:13,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:13,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:13,928 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:13,937 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:56:13,982 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:56:13,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:13,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:14,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:14,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-10-24 11:56:14,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-24 11:56:14,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-24 11:56:14,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:56:14,062 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 14 states. [2018-10-24 11:56:14,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:14,368 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-10-24 11:56:14,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-24 11:56:14,369 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-10-24 11:56:14,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:14,370 INFO L225 Difference]: With dead ends: 67 [2018-10-24 11:56:14,370 INFO L226 Difference]: Without dead ends: 65 [2018-10-24 11:56:14,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:56:14,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-24 11:56:14,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2018-10-24 11:56:14,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-24 11:56:14,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-10-24 11:56:14,380 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2018-10-24 11:56:14,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:14,380 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-10-24 11:56:14,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-24 11:56:14,380 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-10-24 11:56:14,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-24 11:56:14,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:14,381 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:14,381 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:14,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:14,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1241255575, now seen corresponding path program 15 times [2018-10-24 11:56:14,382 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:14,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:14,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:14,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:14,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:14,656 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:14,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:14,656 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:14,664 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:56:14,696 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-24 11:56:14,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:14,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:14,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:14,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-24 11:56:14,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-24 11:56:14,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-24 11:56:14,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2018-10-24 11:56:14,737 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 21 states. [2018-10-24 11:56:15,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:15,095 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-10-24 11:56:15,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-24 11:56:15,095 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2018-10-24 11:56:15,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:15,096 INFO L225 Difference]: With dead ends: 101 [2018-10-24 11:56:15,097 INFO L226 Difference]: Without dead ends: 60 [2018-10-24 11:56:15,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2018-10-24 11:56:15,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-24 11:56:15,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-24 11:56:15,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-24 11:56:15,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-10-24 11:56:15,104 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2018-10-24 11:56:15,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:15,105 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-10-24 11:56:15,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-24 11:56:15,105 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-10-24 11:56:15,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-24 11:56:15,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:15,106 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:15,106 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:15,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:15,107 INFO L82 PathProgramCache]: Analyzing trace with hash 915162787, now seen corresponding path program 16 times [2018-10-24 11:56:15,107 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:15,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:15,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:15,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:15,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:15,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:15,246 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:15,253 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:56:15,279 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:56:15,279 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:15,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:15,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:15,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-24 11:56:15,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 11:56:15,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 11:56:15,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-10-24 11:56:15,358 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 15 states. [2018-10-24 11:56:15,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:15,593 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-24 11:56:15,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-24 11:56:15,594 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2018-10-24 11:56:15,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:15,594 INFO L225 Difference]: With dead ends: 73 [2018-10-24 11:56:15,594 INFO L226 Difference]: Without dead ends: 71 [2018-10-24 11:56:15,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:56:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-24 11:56:15,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2018-10-24 11:56:15,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-24 11:56:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-10-24 11:56:15,604 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2018-10-24 11:56:15,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:15,604 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-10-24 11:56:15,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-24 11:56:15,604 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-10-24 11:56:15,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-24 11:56:15,605 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:15,605 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:15,606 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:15,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:15,606 INFO L82 PathProgramCache]: Analyzing trace with hash -52919828, now seen corresponding path program 17 times [2018-10-24 11:56:15,606 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:15,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:15,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:15,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:15,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:16,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:16,082 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:16,089 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:56:16,123 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-24 11:56:16,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:16,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:16,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:16,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-24 11:56:16,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-24 11:56:16,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-24 11:56:16,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2018-10-24 11:56:16,163 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 23 states. [2018-10-24 11:56:16,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:16,763 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-10-24 11:56:16,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-24 11:56:16,764 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2018-10-24 11:56:16,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:16,764 INFO L225 Difference]: With dead ends: 111 [2018-10-24 11:56:16,764 INFO L226 Difference]: Without dead ends: 66 [2018-10-24 11:56:16,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:56:16,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-24 11:56:16,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-24 11:56:16,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-24 11:56:16,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-10-24 11:56:16,771 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 63 [2018-10-24 11:56:16,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:16,771 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-10-24 11:56:16,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-24 11:56:16,772 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-10-24 11:56:16,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-24 11:56:16,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:16,772 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:16,773 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:16,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:16,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1698071462, now seen corresponding path program 18 times [2018-10-24 11:56:16,773 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:16,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:16,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:16,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:16,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:17,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:17,468 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:17,476 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:56:17,508 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-24 11:56:17,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:17,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:17,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:17,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-24 11:56:17,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 11:56:17,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 11:56:17,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:56:17,612 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 16 states. [2018-10-24 11:56:18,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:18,242 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-10-24 11:56:18,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-24 11:56:18,242 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2018-10-24 11:56:18,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:18,243 INFO L225 Difference]: With dead ends: 79 [2018-10-24 11:56:18,243 INFO L226 Difference]: Without dead ends: 77 [2018-10-24 11:56:18,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=277, Invalid=479, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:56:18,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-24 11:56:18,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2018-10-24 11:56:18,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-24 11:56:18,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-10-24 11:56:18,251 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2018-10-24 11:56:18,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:18,251 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-10-24 11:56:18,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 11:56:18,251 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-10-24 11:56:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-24 11:56:18,252 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:18,252 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:18,252 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:18,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:18,252 INFO L82 PathProgramCache]: Analyzing trace with hash 575047023, now seen corresponding path program 19 times [2018-10-24 11:56:18,252 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:18,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:18,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:18,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:18,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:18,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:18,635 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:18,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:18,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:18,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:18,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-24 11:56:18,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-24 11:56:18,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-24 11:56:18,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2018-10-24 11:56:18,716 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 25 states. [2018-10-24 11:56:19,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:19,019 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2018-10-24 11:56:19,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-24 11:56:19,019 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2018-10-24 11:56:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:19,020 INFO L225 Difference]: With dead ends: 121 [2018-10-24 11:56:19,020 INFO L226 Difference]: Without dead ends: 72 [2018-10-24 11:56:19,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=995, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 11:56:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-24 11:56:19,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-24 11:56:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-24 11:56:19,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-10-24 11:56:19,030 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2018-10-24 11:56:19,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:19,030 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-10-24 11:56:19,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-24 11:56:19,030 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-10-24 11:56:19,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-24 11:56:19,031 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:19,031 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:19,031 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:19,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:19,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1582902359, now seen corresponding path program 20 times [2018-10-24 11:56:19,031 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:19,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:19,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:19,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:19,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:19,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:19,621 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:19,629 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:56:19,662 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:56:19,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:19,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:19,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:19,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-24 11:56:19,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-24 11:56:19,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-24 11:56:19,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-10-24 11:56:19,832 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 17 states. [2018-10-24 11:56:20,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:20,116 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-24 11:56:20,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-24 11:56:20,116 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2018-10-24 11:56:20,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:20,117 INFO L225 Difference]: With dead ends: 85 [2018-10-24 11:56:20,117 INFO L226 Difference]: Without dead ends: 83 [2018-10-24 11:56:20,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=319, Invalid=551, Unknown=0, NotChecked=0, Total=870 [2018-10-24 11:56:20,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-24 11:56:20,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2018-10-24 11:56:20,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-24 11:56:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-10-24 11:56:20,125 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2018-10-24 11:56:20,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:20,126 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-10-24 11:56:20,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-24 11:56:20,126 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-10-24 11:56:20,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-24 11:56:20,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:20,127 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:20,127 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:20,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:20,127 INFO L82 PathProgramCache]: Analyzing trace with hash 238623730, now seen corresponding path program 21 times [2018-10-24 11:56:20,127 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:20,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:20,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:20,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:20,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:20,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:20,426 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:20,432 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:56:20,530 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-24 11:56:20,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:20,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:20,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:20,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-24 11:56:20,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-24 11:56:20,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-24 11:56:20,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2018-10-24 11:56:20,571 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 27 states. [2018-10-24 11:56:20,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:20,933 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-10-24 11:56:20,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-24 11:56:20,933 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 75 [2018-10-24 11:56:20,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:20,933 INFO L225 Difference]: With dead ends: 131 [2018-10-24 11:56:20,933 INFO L226 Difference]: Without dead ends: 78 [2018-10-24 11:56:20,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=391, Invalid=1169, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:56:20,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-24 11:56:20,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-24 11:56:20,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-24 11:56:20,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-10-24 11:56:20,944 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2018-10-24 11:56:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:20,945 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-10-24 11:56:20,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-24 11:56:20,945 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-10-24 11:56:20,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-24 11:56:20,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:20,945 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:20,946 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:20,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:20,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1479518548, now seen corresponding path program 22 times [2018-10-24 11:56:20,946 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:20,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:20,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:20,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:20,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:21,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:21,214 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:21,221 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:56:21,252 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:56:21,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:21,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:21,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:21,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-10-24 11:56:21,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-24 11:56:21,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-24 11:56:21,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:56:21,305 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 18 states. [2018-10-24 11:56:21,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:21,628 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-10-24 11:56:21,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-24 11:56:21,629 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2018-10-24 11:56:21,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:21,630 INFO L225 Difference]: With dead ends: 91 [2018-10-24 11:56:21,630 INFO L226 Difference]: Without dead ends: 89 [2018-10-24 11:56:21,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=364, Invalid=628, Unknown=0, NotChecked=0, Total=992 [2018-10-24 11:56:21,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-24 11:56:21,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2018-10-24 11:56:21,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-24 11:56:21,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-10-24 11:56:21,641 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2018-10-24 11:56:21,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:21,642 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-10-24 11:56:21,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-24 11:56:21,642 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-10-24 11:56:21,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-24 11:56:21,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:21,642 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:21,643 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:21,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:21,643 INFO L82 PathProgramCache]: Analyzing trace with hash 236152181, now seen corresponding path program 23 times [2018-10-24 11:56:21,643 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:21,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:21,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:21,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:21,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:22,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:22,683 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:22,695 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:56:22,732 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-24 11:56:22,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:22,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:22,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:22,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-24 11:56:22,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-24 11:56:22,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-24 11:56:22,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2018-10-24 11:56:22,772 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 29 states. [2018-10-24 11:56:23,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:23,556 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-10-24 11:56:23,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-24 11:56:23,556 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2018-10-24 11:56:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:23,557 INFO L225 Difference]: With dead ends: 141 [2018-10-24 11:56:23,557 INFO L226 Difference]: Without dead ends: 84 [2018-10-24 11:56:23,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 11:56:23,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-24 11:56:23,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-24 11:56:23,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-24 11:56:23,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-10-24 11:56:23,568 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2018-10-24 11:56:23,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:23,569 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-10-24 11:56:23,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-24 11:56:23,569 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-10-24 11:56:23,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-24 11:56:23,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:23,570 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:23,570 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:23,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:23,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1931357359, now seen corresponding path program 24 times [2018-10-24 11:56:23,570 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:23,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:23,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:23,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:23,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 182 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:23,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:23,917 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:23,925 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:56:23,969 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-24 11:56:23,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:23,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 182 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:24,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:24,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-10-24 11:56:24,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-24 11:56:24,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-24 11:56:24,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-24 11:56:24,044 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 19 states. [2018-10-24 11:56:24,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:24,318 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-24 11:56:24,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-24 11:56:24,318 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2018-10-24 11:56:24,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:24,319 INFO L225 Difference]: With dead ends: 97 [2018-10-24 11:56:24,319 INFO L226 Difference]: Without dead ends: 95 [2018-10-24 11:56:24,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=412, Invalid=710, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:56:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-24 11:56:24,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2018-10-24 11:56:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-24 11:56:24,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-10-24 11:56:24,333 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2018-10-24 11:56:24,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:24,333 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-10-24 11:56:24,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-24 11:56:24,333 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-10-24 11:56:24,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-24 11:56:24,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:24,334 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:24,334 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:24,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:24,334 INFO L82 PathProgramCache]: Analyzing trace with hash 850428408, now seen corresponding path program 25 times [2018-10-24 11:56:24,335 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:24,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:24,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:24,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:24,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 351 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:25,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:25,601 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:25,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:25,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 351 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:25,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:25,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-24 11:56:25,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-24 11:56:25,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-24 11:56:25,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2018-10-24 11:56:25,689 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 31 states. [2018-10-24 11:56:26,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:26,675 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-10-24 11:56:26,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-24 11:56:26,675 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 87 [2018-10-24 11:56:26,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:26,676 INFO L225 Difference]: With dead ends: 151 [2018-10-24 11:56:26,676 INFO L226 Difference]: Without dead ends: 90 [2018-10-24 11:56:26,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=511, Invalid=1559, Unknown=0, NotChecked=0, Total=2070 [2018-10-24 11:56:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-24 11:56:26,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-24 11:56:26,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-24 11:56:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-10-24 11:56:26,689 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 87 [2018-10-24 11:56:26,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:26,689 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-10-24 11:56:26,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-24 11:56:26,689 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-10-24 11:56:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-24 11:56:26,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:26,690 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:26,690 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:26,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:26,690 INFO L82 PathProgramCache]: Analyzing trace with hash 477328818, now seen corresponding path program 26 times [2018-10-24 11:56:26,691 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:26,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:26,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:26,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:26,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 210 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:27,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:27,107 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:27,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:56:27,155 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:56:27,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:27,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 210 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:27,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:27,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-10-24 11:56:27,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-24 11:56:27,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-24 11:56:27,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:56:27,239 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 20 states. [2018-10-24 11:56:27,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:27,569 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-10-24 11:56:27,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-24 11:56:27,569 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2018-10-24 11:56:27,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:27,570 INFO L225 Difference]: With dead ends: 103 [2018-10-24 11:56:27,570 INFO L226 Difference]: Without dead ends: 101 [2018-10-24 11:56:27,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=463, Invalid=797, Unknown=0, NotChecked=0, Total=1260 [2018-10-24 11:56:27,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-24 11:56:27,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2018-10-24 11:56:27,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-24 11:56:27,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-10-24 11:56:27,583 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 89 [2018-10-24 11:56:27,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:27,583 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-10-24 11:56:27,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-24 11:56:27,583 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-10-24 11:56:27,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-24 11:56:27,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:27,584 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:27,584 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:27,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:27,585 INFO L82 PathProgramCache]: Analyzing trace with hash 778277243, now seen corresponding path program 27 times [2018-10-24 11:56:27,585 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:27,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:27,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:27,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:27,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 406 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:27,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:27,976 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:27,985 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:56:28,040 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-24 11:56:28,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:28,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 406 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:28,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:28,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-24 11:56:28,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-24 11:56:28,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-24 11:56:28,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2018-10-24 11:56:28,092 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 33 states. [2018-10-24 11:56:28,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:28,669 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-10-24 11:56:28,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-24 11:56:28,669 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 93 [2018-10-24 11:56:28,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:28,670 INFO L225 Difference]: With dead ends: 161 [2018-10-24 11:56:28,670 INFO L226 Difference]: Without dead ends: 96 [2018-10-24 11:56:28,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=577, Invalid=1775, Unknown=0, NotChecked=0, Total=2352 [2018-10-24 11:56:28,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-24 11:56:28,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-24 11:56:28,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-24 11:56:28,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-10-24 11:56:28,686 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 93 [2018-10-24 11:56:28,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:28,686 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-10-24 11:56:28,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-24 11:56:28,686 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-10-24 11:56:28,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-24 11:56:28,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:28,687 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:28,687 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:28,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:28,687 INFO L82 PathProgramCache]: Analyzing trace with hash 942363061, now seen corresponding path program 28 times [2018-10-24 11:56:28,687 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:28,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:28,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:28,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:28,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 240 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:28,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:28,931 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:28,945 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:56:28,981 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:56:28,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:28,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 240 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:29,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:29,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-10-24 11:56:29,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-24 11:56:29,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-24 11:56:29,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2018-10-24 11:56:29,067 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 21 states. [2018-10-24 11:56:29,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:29,401 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-24 11:56:29,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-24 11:56:29,402 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 95 [2018-10-24 11:56:29,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:29,403 INFO L225 Difference]: With dead ends: 109 [2018-10-24 11:56:29,403 INFO L226 Difference]: Without dead ends: 107 [2018-10-24 11:56:29,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=517, Invalid=889, Unknown=0, NotChecked=0, Total=1406 [2018-10-24 11:56:29,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-24 11:56:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2018-10-24 11:56:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-24 11:56:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-10-24 11:56:29,417 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2018-10-24 11:56:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:29,418 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-10-24 11:56:29,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-24 11:56:29,418 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-10-24 11:56:29,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-24 11:56:29,418 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:29,419 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:29,419 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:29,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:29,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1292389378, now seen corresponding path program 29 times [2018-10-24 11:56:29,419 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:29,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:29,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:29,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:29,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 465 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:29,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:29,932 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:29,939 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:56:30,136 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-24 11:56:30,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:30,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 465 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:30,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:30,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-24 11:56:30,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-24 11:56:30,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-24 11:56:30,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 11:56:30,185 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 35 states. [2018-10-24 11:56:30,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:30,832 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-10-24 11:56:30,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-24 11:56:30,832 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 99 [2018-10-24 11:56:30,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:30,833 INFO L225 Difference]: With dead ends: 171 [2018-10-24 11:56:30,833 INFO L226 Difference]: Without dead ends: 102 [2018-10-24 11:56:30,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=647, Invalid=2005, Unknown=0, NotChecked=0, Total=2652 [2018-10-24 11:56:30,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-24 11:56:30,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-24 11:56:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-24 11:56:30,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-10-24 11:56:30,849 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2018-10-24 11:56:30,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:30,849 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-10-24 11:56:30,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-24 11:56:30,849 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-10-24 11:56:30,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-24 11:56:30,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:30,850 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:30,850 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:30,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:30,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1273438024, now seen corresponding path program 30 times [2018-10-24 11:56:30,851 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:30,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:30,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:30,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:30,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 272 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:31,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:31,134 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:31,142 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:56:31,204 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-24 11:56:31,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:31,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 272 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:31,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:31,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-10-24 11:56:31,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-24 11:56:31,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-24 11:56:31,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:56:31,367 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 22 states. [2018-10-24 11:56:31,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:31,743 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-10-24 11:56:31,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-24 11:56:31,743 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2018-10-24 11:56:31,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:31,744 INFO L225 Difference]: With dead ends: 115 [2018-10-24 11:56:31,744 INFO L226 Difference]: Without dead ends: 113 [2018-10-24 11:56:31,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=574, Invalid=986, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:56:31,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-24 11:56:31,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 106. [2018-10-24 11:56:31,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-24 11:56:31,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-10-24 11:56:31,761 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2018-10-24 11:56:31,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:31,761 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-10-24 11:56:31,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-24 11:56:31,761 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-10-24 11:56:31,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-24 11:56:31,762 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:31,762 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:31,762 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:31,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:31,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1336936833, now seen corresponding path program 31 times [2018-10-24 11:56:31,763 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:31,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:31,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:31,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:31,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:32,262 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 528 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:32,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:32,263 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:32,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:32,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 528 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:32,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:32,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-24 11:56:32,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-24 11:56:32,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-24 11:56:32,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 11:56:32,357 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 37 states. [2018-10-24 11:56:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:34,179 INFO L93 Difference]: Finished difference Result 181 states and 183 transitions. [2018-10-24 11:56:34,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-24 11:56:34,179 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 105 [2018-10-24 11:56:34,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:34,179 INFO L225 Difference]: With dead ends: 181 [2018-10-24 11:56:34,180 INFO L226 Difference]: Without dead ends: 108 [2018-10-24 11:56:34,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2018-10-24 11:56:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-24 11:56:34,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-24 11:56:34,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-24 11:56:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-10-24 11:56:34,194 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 105 [2018-10-24 11:56:34,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:34,194 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-10-24 11:56:34,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-24 11:56:34,194 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-10-24 11:56:34,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-24 11:56:34,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:34,195 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:34,195 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:34,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:34,195 INFO L82 PathProgramCache]: Analyzing trace with hash 898056891, now seen corresponding path program 32 times [2018-10-24 11:56:34,195 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:34,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:34,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:34,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:34,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 306 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:34,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:34,695 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:34,702 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:56:34,748 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:56:34,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:34,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 306 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:34,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:34,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-10-24 11:56:34,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-24 11:56:34,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-24 11:56:34,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-10-24 11:56:34,827 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 23 states. [2018-10-24 11:56:35,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:35,197 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-24 11:56:35,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-24 11:56:35,198 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2018-10-24 11:56:35,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:35,199 INFO L225 Difference]: With dead ends: 121 [2018-10-24 11:56:35,199 INFO L226 Difference]: Without dead ends: 119 [2018-10-24 11:56:35,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=634, Invalid=1088, Unknown=0, NotChecked=0, Total=1722 [2018-10-24 11:56:35,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-24 11:56:35,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2018-10-24 11:56:35,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-24 11:56:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-10-24 11:56:35,215 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2018-10-24 11:56:35,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:35,216 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-10-24 11:56:35,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-24 11:56:35,216 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-10-24 11:56:35,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-24 11:56:35,216 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:35,216 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:35,217 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:35,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:35,217 INFO L82 PathProgramCache]: Analyzing trace with hash -817384956, now seen corresponding path program 33 times [2018-10-24 11:56:35,217 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:35,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:35,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:35,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:35,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 595 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:35,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:35,747 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:35,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:56:35,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-24 11:56:35,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:35,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 595 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:35,853 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:35,853 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-24 11:56:35,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-24 11:56:35,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-24 11:56:35,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2018-10-24 11:56:35,854 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 39 states. [2018-10-24 11:56:37,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:37,196 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2018-10-24 11:56:37,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-24 11:56:37,197 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 111 [2018-10-24 11:56:37,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:37,197 INFO L225 Difference]: With dead ends: 191 [2018-10-24 11:56:37,197 INFO L226 Difference]: Without dead ends: 114 [2018-10-24 11:56:37,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=799, Invalid=2507, Unknown=0, NotChecked=0, Total=3306 [2018-10-24 11:56:37,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-24 11:56:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-24 11:56:37,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-24 11:56:37,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-10-24 11:56:37,214 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 111 [2018-10-24 11:56:37,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:37,214 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-10-24 11:56:37,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-24 11:56:37,215 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-10-24 11:56:37,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-24 11:56:37,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:37,215 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:37,216 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:37,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:37,216 INFO L82 PathProgramCache]: Analyzing trace with hash -147220546, now seen corresponding path program 34 times [2018-10-24 11:56:37,216 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:37,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:37,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:37,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:37,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 342 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:37,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:37,615 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:37,622 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:56:37,670 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:56:37,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:37,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 342 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:38,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:38,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-10-24 11:56:38,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-24 11:56:38,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-24 11:56:38,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:56:38,031 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 24 states. [2018-10-24 11:56:39,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:39,249 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2018-10-24 11:56:39,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-24 11:56:39,249 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2018-10-24 11:56:39,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:39,251 INFO L225 Difference]: With dead ends: 127 [2018-10-24 11:56:39,251 INFO L226 Difference]: Without dead ends: 125 [2018-10-24 11:56:39,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=697, Invalid=1195, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 11:56:39,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-24 11:56:39,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2018-10-24 11:56:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-24 11:56:39,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-10-24 11:56:39,274 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 113 [2018-10-24 11:56:39,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:39,275 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-10-24 11:56:39,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-24 11:56:39,275 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-10-24 11:56:39,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-24 11:56:39,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:39,276 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:39,276 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:39,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:39,277 INFO L82 PathProgramCache]: Analyzing trace with hash 368168327, now seen corresponding path program 35 times [2018-10-24 11:56:39,277 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:39,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:39,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:39,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:39,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 666 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:41,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:41,120 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:41,127 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:56:41,282 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-24 11:56:41,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:41,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 666 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:41,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:41,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-24 11:56:41,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-24 11:56:41,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-24 11:56:41,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2018-10-24 11:56:41,331 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 41 states. [2018-10-24 11:56:42,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:42,175 INFO L93 Difference]: Finished difference Result 201 states and 203 transitions. [2018-10-24 11:56:42,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-24 11:56:42,175 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 117 [2018-10-24 11:56:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:42,176 INFO L225 Difference]: With dead ends: 201 [2018-10-24 11:56:42,176 INFO L226 Difference]: Without dead ends: 120 [2018-10-24 11:56:42,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=881, Invalid=2779, Unknown=0, NotChecked=0, Total=3660 [2018-10-24 11:56:42,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-24 11:56:42,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-24 11:56:42,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-24 11:56:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2018-10-24 11:56:42,201 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 117 [2018-10-24 11:56:42,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:42,201 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2018-10-24 11:56:42,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-24 11:56:42,201 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2018-10-24 11:56:42,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-24 11:56:42,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:42,202 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:42,202 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:42,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:42,203 INFO L82 PathProgramCache]: Analyzing trace with hash 661323713, now seen corresponding path program 36 times [2018-10-24 11:56:42,203 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:42,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:42,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:42,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:42,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 380 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:43,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:43,673 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:43,689 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:56:43,752 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-24 11:56:43,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:43,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 380 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:44,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:44,144 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-10-24 11:56:44,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-24 11:56:44,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-24 11:56:44,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-10-24 11:56:44,145 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 25 states. [2018-10-24 11:56:45,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:45,184 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-10-24 11:56:45,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-24 11:56:45,184 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 119 [2018-10-24 11:56:45,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:45,185 INFO L225 Difference]: With dead ends: 133 [2018-10-24 11:56:45,186 INFO L226 Difference]: Without dead ends: 131 [2018-10-24 11:56:45,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=763, Invalid=1307, Unknown=0, NotChecked=0, Total=2070 [2018-10-24 11:56:45,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-24 11:56:45,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2018-10-24 11:56:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-24 11:56:45,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2018-10-24 11:56:45,206 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 119 [2018-10-24 11:56:45,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:45,206 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2018-10-24 11:56:45,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-24 11:56:45,206 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2018-10-24 11:56:45,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-24 11:56:45,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:45,207 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:45,207 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:45,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:45,207 INFO L82 PathProgramCache]: Analyzing trace with hash 2136570890, now seen corresponding path program 37 times [2018-10-24 11:56:45,207 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:45,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:45,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:45,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:45,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 741 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:45,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:45,975 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:45,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:46,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 741 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:46,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:46,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-24 11:56:46,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-24 11:56:46,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-24 11:56:46,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1343, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 11:56:46,079 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 43 states. [2018-10-24 11:56:47,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:47,357 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2018-10-24 11:56:47,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-24 11:56:47,358 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 123 [2018-10-24 11:56:47,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:47,358 INFO L225 Difference]: With dead ends: 211 [2018-10-24 11:56:47,359 INFO L226 Difference]: Without dead ends: 126 [2018-10-24 11:56:47,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=967, Invalid=3065, Unknown=0, NotChecked=0, Total=4032 [2018-10-24 11:56:47,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-24 11:56:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-24 11:56:47,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-24 11:56:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2018-10-24 11:56:47,385 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 123 [2018-10-24 11:56:47,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:47,385 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2018-10-24 11:56:47,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-24 11:56:47,385 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2018-10-24 11:56:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-10-24 11:56:47,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:47,386 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:47,386 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:47,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:47,386 INFO L82 PathProgramCache]: Analyzing trace with hash -976315708, now seen corresponding path program 38 times [2018-10-24 11:56:47,387 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:47,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:47,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:47,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:47,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 420 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:47,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:47,787 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:47,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:56:47,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:56:47,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:47,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 420 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:47,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:47,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-10-24 11:56:47,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-24 11:56:47,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-24 11:56:47,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:56:47,918 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 26 states. [2018-10-24 11:56:48,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:48,420 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2018-10-24 11:56:48,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-24 11:56:48,420 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 125 [2018-10-24 11:56:48,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:48,422 INFO L225 Difference]: With dead ends: 139 [2018-10-24 11:56:48,422 INFO L226 Difference]: Without dead ends: 137 [2018-10-24 11:56:48,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=832, Invalid=1424, Unknown=0, NotChecked=0, Total=2256 [2018-10-24 11:56:48,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-24 11:56:48,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2018-10-24 11:56:48,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-24 11:56:48,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2018-10-24 11:56:48,449 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 125 [2018-10-24 11:56:48,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:48,449 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2018-10-24 11:56:48,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-24 11:56:48,449 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2018-10-24 11:56:48,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-24 11:56:48,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:48,450 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:48,450 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:48,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:48,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1130242675, now seen corresponding path program 39 times [2018-10-24 11:56:48,451 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:48,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:48,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:48,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:48,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 820 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:49,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:49,077 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:49,085 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:56:49,214 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-24 11:56:49,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:49,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 820 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:49,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:49,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-24 11:56:49,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-24 11:56:49,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-24 11:56:49,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2018-10-24 11:56:49,273 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 45 states. [2018-10-24 11:56:50,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:50,286 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2018-10-24 11:56:50,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-24 11:56:50,287 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 129 [2018-10-24 11:56:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:50,288 INFO L225 Difference]: With dead ends: 221 [2018-10-24 11:56:50,288 INFO L226 Difference]: Without dead ends: 132 [2018-10-24 11:56:50,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1057, Invalid=3365, Unknown=0, NotChecked=0, Total=4422 [2018-10-24 11:56:50,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-24 11:56:50,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-10-24 11:56:50,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-10-24 11:56:50,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2018-10-24 11:56:50,315 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2018-10-24 11:56:50,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:50,315 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2018-10-24 11:56:50,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-24 11:56:50,315 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2018-10-24 11:56:50,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-10-24 11:56:50,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:50,316 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:50,316 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:50,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:50,317 INFO L82 PathProgramCache]: Analyzing trace with hash 26183879, now seen corresponding path program 40 times [2018-10-24 11:56:50,317 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:50,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:50,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:50,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:50,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:50,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 462 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:50,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:50,848 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:50,855 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:56:50,906 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:56:50,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:50,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 462 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:50,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:50,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-10-24 11:56:50,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-24 11:56:50,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-24 11:56:50,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2018-10-24 11:56:50,981 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 27 states. [2018-10-24 11:56:51,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:51,479 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-10-24 11:56:51,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-24 11:56:51,480 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 131 [2018-10-24 11:56:51,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:51,481 INFO L225 Difference]: With dead ends: 145 [2018-10-24 11:56:51,481 INFO L226 Difference]: Without dead ends: 143 [2018-10-24 11:56:51,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=904, Invalid=1546, Unknown=0, NotChecked=0, Total=2450 [2018-10-24 11:56:51,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-24 11:56:51,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2018-10-24 11:56:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-24 11:56:51,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2018-10-24 11:56:51,503 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 131 [2018-10-24 11:56:51,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:51,504 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2018-10-24 11:56:51,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-24 11:56:51,504 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2018-10-24 11:56:51,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-24 11:56:51,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:51,505 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:51,505 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:51,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:51,505 INFO L82 PathProgramCache]: Analyzing trace with hash 845550096, now seen corresponding path program 41 times [2018-10-24 11:56:51,505 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:51,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:51,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:51,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:51,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 903 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:53,813 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:53,813 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:53,820 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:56:53,897 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-24 11:56:53,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:53,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 903 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:53,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:53,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-24 11:56:53,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-24 11:56:53,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-24 11:56:53,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=1609, Unknown=0, NotChecked=0, Total=2162 [2018-10-24 11:56:53,960 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 47 states. [2018-10-24 11:56:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:55,157 INFO L93 Difference]: Finished difference Result 231 states and 233 transitions. [2018-10-24 11:56:55,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-24 11:56:55,158 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 135 [2018-10-24 11:56:55,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:55,158 INFO L225 Difference]: With dead ends: 231 [2018-10-24 11:56:55,159 INFO L226 Difference]: Without dead ends: 138 [2018-10-24 11:56:55,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1151, Invalid=3679, Unknown=0, NotChecked=0, Total=4830 [2018-10-24 11:56:55,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-24 11:56:55,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-24 11:56:55,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-24 11:56:55,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2018-10-24 11:56:55,185 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 135 [2018-10-24 11:56:55,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:55,185 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2018-10-24 11:56:55,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-24 11:56:55,186 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2018-10-24 11:56:55,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-24 11:56:55,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:55,187 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:55,187 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:55,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:55,187 INFO L82 PathProgramCache]: Analyzing trace with hash 391178698, now seen corresponding path program 42 times [2018-10-24 11:56:55,187 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:55,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:55,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:55,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:55,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 506 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:56,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:56,028 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:56,038 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:56:56,112 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-24 11:56:56,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:56:56,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 506 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:56,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:56,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-10-24 11:56:56,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-24 11:56:56,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-24 11:56:56,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:56:56,198 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 28 states. [2018-10-24 11:56:56,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:56:56,674 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2018-10-24 11:56:56,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-24 11:56:56,675 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 137 [2018-10-24 11:56:56,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:56:56,676 INFO L225 Difference]: With dead ends: 151 [2018-10-24 11:56:56,676 INFO L226 Difference]: Without dead ends: 149 [2018-10-24 11:56:56,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=979, Invalid=1673, Unknown=0, NotChecked=0, Total=2652 [2018-10-24 11:56:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-24 11:56:56,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 142. [2018-10-24 11:56:56,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-24 11:56:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2018-10-24 11:56:56,710 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 137 [2018-10-24 11:56:56,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:56:56,710 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2018-10-24 11:56:56,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-24 11:56:56,710 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2018-10-24 11:56:56,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-24 11:56:56,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:56:56,711 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-24 11:56:56,711 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:56:56,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:56:56,712 INFO L82 PathProgramCache]: Analyzing trace with hash -692504173, now seen corresponding path program 43 times [2018-10-24 11:56:56,712 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:56:56,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:56:56,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:56,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:56:56,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:56:56,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:59,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 990 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:59,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:56:59,083 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:56:59,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:56:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:56:59,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:56:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 990 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:56:59,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:56:59,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-24 11:56:59,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-24 11:56:59,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-24 11:56:59,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=1751, Unknown=0, NotChecked=0, Total=2352 [2018-10-24 11:56:59,205 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 49 states. [2018-10-24 11:57:00,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:00,425 INFO L93 Difference]: Finished difference Result 241 states and 243 transitions. [2018-10-24 11:57:00,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-24 11:57:00,426 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 141 [2018-10-24 11:57:00,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:00,426 INFO L225 Difference]: With dead ends: 241 [2018-10-24 11:57:00,426 INFO L226 Difference]: Without dead ends: 144 [2018-10-24 11:57:00,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1249, Invalid=4007, Unknown=0, NotChecked=0, Total=5256 [2018-10-24 11:57:00,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-24 11:57:00,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-10-24 11:57:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-24 11:57:00,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2018-10-24 11:57:00,452 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 141 [2018-10-24 11:57:00,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:00,452 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2018-10-24 11:57:00,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-24 11:57:00,452 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2018-10-24 11:57:00,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-24 11:57:00,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:00,453 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:00,453 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:00,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:00,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1355948595, now seen corresponding path program 44 times [2018-10-24 11:57:00,453 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:00,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:00,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:00,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:00,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 552 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:00,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:00,916 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:00,923 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:57:00,984 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:57:00,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:00,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 552 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:01,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:01,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-10-24 11:57:01,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-24 11:57:01,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-24 11:57:01,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-10-24 11:57:01,265 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 29 states. [2018-10-24 11:57:01,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:01,790 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-10-24 11:57:01,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-24 11:57:01,791 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 143 [2018-10-24 11:57:01,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:01,792 INFO L225 Difference]: With dead ends: 157 [2018-10-24 11:57:01,792 INFO L226 Difference]: Without dead ends: 155 [2018-10-24 11:57:01,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1057, Invalid=1805, Unknown=0, NotChecked=0, Total=2862 [2018-10-24 11:57:01,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-24 11:57:01,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 148. [2018-10-24 11:57:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-24 11:57:01,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2018-10-24 11:57:01,814 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 143 [2018-10-24 11:57:01,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:01,814 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2018-10-24 11:57:01,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-24 11:57:01,814 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2018-10-24 11:57:01,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-24 11:57:01,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:01,815 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:01,815 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:01,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:01,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1893305322, now seen corresponding path program 45 times [2018-10-24 11:57:01,815 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:01,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:01,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:01,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:01,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 1081 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:04,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:04,584 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:04,592 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:57:04,683 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-24 11:57:04,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:04,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 1081 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:04,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:04,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-24 11:57:04,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-24 11:57:04,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-24 11:57:04,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=1899, Unknown=0, NotChecked=0, Total=2550 [2018-10-24 11:57:04,756 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 51 states. [2018-10-24 11:57:07,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:07,605 INFO L93 Difference]: Finished difference Result 251 states and 253 transitions. [2018-10-24 11:57:07,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-24 11:57:07,605 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 147 [2018-10-24 11:57:07,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:07,606 INFO L225 Difference]: With dead ends: 251 [2018-10-24 11:57:07,606 INFO L226 Difference]: Without dead ends: 150 [2018-10-24 11:57:07,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1351, Invalid=4349, Unknown=0, NotChecked=0, Total=5700 [2018-10-24 11:57:07,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-24 11:57:07,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-10-24 11:57:07,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-24 11:57:07,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2018-10-24 11:57:07,633 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 147 [2018-10-24 11:57:07,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:07,633 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2018-10-24 11:57:07,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-24 11:57:07,633 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2018-10-24 11:57:07,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-24 11:57:07,634 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:07,634 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:07,634 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:07,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:07,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1162246960, now seen corresponding path program 46 times [2018-10-24 11:57:07,634 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:07,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:07,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:07,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:07,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:08,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 600 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:08,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:08,185 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:08,194 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:57:08,254 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:57:08,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:08,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 600 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:08,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:08,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-10-24 11:57:08,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-24 11:57:08,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-24 11:57:08,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-10-24 11:57:08,461 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 30 states. [2018-10-24 11:57:09,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:09,000 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2018-10-24 11:57:09,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-24 11:57:09,000 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 149 [2018-10-24 11:57:09,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:09,001 INFO L225 Difference]: With dead ends: 163 [2018-10-24 11:57:09,001 INFO L226 Difference]: Without dead ends: 161 [2018-10-24 11:57:09,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1138, Invalid=1942, Unknown=0, NotChecked=0, Total=3080 [2018-10-24 11:57:09,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-24 11:57:09,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 154. [2018-10-24 11:57:09,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-24 11:57:09,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2018-10-24 11:57:09,040 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 149 [2018-10-24 11:57:09,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:09,040 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2018-10-24 11:57:09,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-24 11:57:09,040 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2018-10-24 11:57:09,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-24 11:57:09,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:09,041 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:09,041 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:09,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:09,041 INFO L82 PathProgramCache]: Analyzing trace with hash 246473113, now seen corresponding path program 47 times [2018-10-24 11:57:09,042 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:09,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:09,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:09,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:09,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 1176 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:10,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:10,164 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:10,172 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:57:10,260 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-24 11:57:10,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:10,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 1176 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:10,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:10,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-24 11:57:10,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-24 11:57:10,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-24 11:57:10,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=2053, Unknown=0, NotChecked=0, Total=2756 [2018-10-24 11:57:10,339 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 53 states. [2018-10-24 11:57:11,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:11,761 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2018-10-24 11:57:11,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-24 11:57:11,762 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 153 [2018-10-24 11:57:11,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:11,763 INFO L225 Difference]: With dead ends: 261 [2018-10-24 11:57:11,763 INFO L226 Difference]: Without dead ends: 156 [2018-10-24 11:57:11,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1457, Invalid=4705, Unknown=0, NotChecked=0, Total=6162 [2018-10-24 11:57:11,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-24 11:57:11,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-24 11:57:11,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-24 11:57:11,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2018-10-24 11:57:11,800 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 153 [2018-10-24 11:57:11,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:11,800 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2018-10-24 11:57:11,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-24 11:57:11,800 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2018-10-24 11:57:11,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-24 11:57:11,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:11,801 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:11,801 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:11,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:11,802 INFO L82 PathProgramCache]: Analyzing trace with hash -755040557, now seen corresponding path program 48 times [2018-10-24 11:57:11,802 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:11,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:11,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:11,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:11,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 650 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:12,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:12,904 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:12,912 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:57:13,008 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-24 11:57:13,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:13,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 650 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:13,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:13,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-10-24 11:57:13,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-24 11:57:13,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-24 11:57:13,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-10-24 11:57:13,094 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand 31 states. [2018-10-24 11:57:13,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:13,657 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-10-24 11:57:13,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-24 11:57:13,657 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 155 [2018-10-24 11:57:13,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:13,658 INFO L225 Difference]: With dead ends: 169 [2018-10-24 11:57:13,658 INFO L226 Difference]: Without dead ends: 167 [2018-10-24 11:57:13,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1222, Invalid=2084, Unknown=0, NotChecked=0, Total=3306 [2018-10-24 11:57:13,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-24 11:57:13,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2018-10-24 11:57:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-24 11:57:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2018-10-24 11:57:13,687 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 155 [2018-10-24 11:57:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:13,687 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2018-10-24 11:57:13,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-24 11:57:13,687 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2018-10-24 11:57:13,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-24 11:57:13,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:13,688 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:13,688 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:13,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:13,689 INFO L82 PathProgramCache]: Analyzing trace with hash 869507612, now seen corresponding path program 49 times [2018-10-24 11:57:13,689 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:13,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:13,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:13,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:13,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 1275 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:14,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:14,665 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:14,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:14,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 1275 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:14,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:14,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-24 11:57:14,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-24 11:57:14,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-24 11:57:14,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=2213, Unknown=0, NotChecked=0, Total=2970 [2018-10-24 11:57:14,810 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 55 states. [2018-10-24 11:57:16,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:16,289 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2018-10-24 11:57:16,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-24 11:57:16,290 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 159 [2018-10-24 11:57:16,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:16,291 INFO L225 Difference]: With dead ends: 271 [2018-10-24 11:57:16,291 INFO L226 Difference]: Without dead ends: 162 [2018-10-24 11:57:16,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1567, Invalid=5075, Unknown=0, NotChecked=0, Total=6642 [2018-10-24 11:57:16,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-24 11:57:16,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-10-24 11:57:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-10-24 11:57:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2018-10-24 11:57:16,321 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 159 [2018-10-24 11:57:16,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:16,321 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2018-10-24 11:57:16,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-24 11:57:16,321 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2018-10-24 11:57:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-24 11:57:16,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:16,322 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:16,323 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:16,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:16,323 INFO L82 PathProgramCache]: Analyzing trace with hash 377580502, now seen corresponding path program 50 times [2018-10-24 11:57:16,323 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:16,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:16,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:16,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:16,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 702 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:16,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:16,739 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:16,747 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:57:16,816 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:57:16,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:16,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 702 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:17,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:17,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-10-24 11:57:17,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-24 11:57:17,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-24 11:57:17,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-10-24 11:57:17,289 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 32 states. [2018-10-24 11:57:17,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:17,919 INFO L93 Difference]: Finished difference Result 175 states and 176 transitions. [2018-10-24 11:57:17,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-24 11:57:17,919 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 161 [2018-10-24 11:57:17,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:17,921 INFO L225 Difference]: With dead ends: 175 [2018-10-24 11:57:17,921 INFO L226 Difference]: Without dead ends: 173 [2018-10-24 11:57:17,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1309, Invalid=2231, Unknown=0, NotChecked=0, Total=3540 [2018-10-24 11:57:17,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-24 11:57:17,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 166. [2018-10-24 11:57:17,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-24 11:57:17,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2018-10-24 11:57:17,963 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 161 [2018-10-24 11:57:17,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:17,963 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2018-10-24 11:57:17,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-24 11:57:17,963 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2018-10-24 11:57:17,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-24 11:57:17,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:17,964 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:17,965 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:17,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:17,965 INFO L82 PathProgramCache]: Analyzing trace with hash -427698785, now seen corresponding path program 51 times [2018-10-24 11:57:17,965 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:17,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:17,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:17,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:17,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1378 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:19,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:19,065 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:19,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:57:19,168 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-24 11:57:19,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:19,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1378 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:19,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:19,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-24 11:57:19,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-24 11:57:19,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-24 11:57:19,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=813, Invalid=2379, Unknown=0, NotChecked=0, Total=3192 [2018-10-24 11:57:19,241 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 57 states. [2018-10-24 11:57:20,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:20,465 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2018-10-24 11:57:20,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-24 11:57:20,465 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 165 [2018-10-24 11:57:20,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:20,466 INFO L225 Difference]: With dead ends: 281 [2018-10-24 11:57:20,466 INFO L226 Difference]: Without dead ends: 168 [2018-10-24 11:57:20,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1681, Invalid=5459, Unknown=0, NotChecked=0, Total=7140 [2018-10-24 11:57:20,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-24 11:57:20,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-10-24 11:57:20,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-24 11:57:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2018-10-24 11:57:20,497 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 165 [2018-10-24 11:57:20,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:20,497 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2018-10-24 11:57:20,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-24 11:57:20,497 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2018-10-24 11:57:20,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-24 11:57:20,498 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:20,498 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:20,498 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:20,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:20,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2026116135, now seen corresponding path program 52 times [2018-10-24 11:57:20,499 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:20,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:20,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:20,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:20,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 756 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:21,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:21,149 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:21,158 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:57:21,224 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:57:21,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:21,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 756 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:21,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:21,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-10-24 11:57:21,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-24 11:57:21,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-24 11:57:21,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2018-10-24 11:57:21,393 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand 33 states. [2018-10-24 11:57:22,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:22,029 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-10-24 11:57:22,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-24 11:57:22,029 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 167 [2018-10-24 11:57:22,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:22,030 INFO L225 Difference]: With dead ends: 181 [2018-10-24 11:57:22,030 INFO L226 Difference]: Without dead ends: 179 [2018-10-24 11:57:22,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1399, Invalid=2383, Unknown=0, NotChecked=0, Total=3782 [2018-10-24 11:57:22,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-24 11:57:22,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 172. [2018-10-24 11:57:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-24 11:57:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2018-10-24 11:57:22,063 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 167 [2018-10-24 11:57:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:22,063 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2018-10-24 11:57:22,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-24 11:57:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2018-10-24 11:57:22,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-24 11:57:22,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:22,064 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:22,064 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:22,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:22,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1982241826, now seen corresponding path program 53 times [2018-10-24 11:57:22,065 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:22,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:22,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:22,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:22,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 1485 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:23,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:23,391 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:23,399 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:57:23,500 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-24 11:57:23,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:23,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 1485 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:23,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:23,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-24 11:57:23,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-24 11:57:23,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-24 11:57:23,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2018-10-24 11:57:23,555 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand 59 states. [2018-10-24 11:57:25,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:25,309 INFO L93 Difference]: Finished difference Result 291 states and 293 transitions. [2018-10-24 11:57:25,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-24 11:57:25,309 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 171 [2018-10-24 11:57:25,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:25,310 INFO L225 Difference]: With dead ends: 291 [2018-10-24 11:57:25,310 INFO L226 Difference]: Without dead ends: 174 [2018-10-24 11:57:25,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1799, Invalid=5857, Unknown=0, NotChecked=0, Total=7656 [2018-10-24 11:57:25,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-24 11:57:25,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-10-24 11:57:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-10-24 11:57:25,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2018-10-24 11:57:25,343 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 171 [2018-10-24 11:57:25,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:25,344 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2018-10-24 11:57:25,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-24 11:57:25,344 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2018-10-24 11:57:25,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-24 11:57:25,344 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:25,344 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:25,345 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:25,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:25,345 INFO L82 PathProgramCache]: Analyzing trace with hash -392061220, now seen corresponding path program 54 times [2018-10-24 11:57:25,345 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:25,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:25,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:25,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:25,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 812 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:25,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:25,829 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:25,836 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:57:25,941 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-24 11:57:25,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:25,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 812 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:26,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:26,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-10-24 11:57:26,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-24 11:57:26,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-24 11:57:26,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:57:26,040 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 34 states. [2018-10-24 11:57:26,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:26,731 INFO L93 Difference]: Finished difference Result 187 states and 188 transitions. [2018-10-24 11:57:26,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-24 11:57:26,731 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 173 [2018-10-24 11:57:26,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:26,732 INFO L225 Difference]: With dead ends: 187 [2018-10-24 11:57:26,732 INFO L226 Difference]: Without dead ends: 185 [2018-10-24 11:57:26,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1492, Invalid=2540, Unknown=0, NotChecked=0, Total=4032 [2018-10-24 11:57:26,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-24 11:57:26,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 178. [2018-10-24 11:57:26,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-24 11:57:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2018-10-24 11:57:26,783 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 173 [2018-10-24 11:57:26,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:26,783 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2018-10-24 11:57:26,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-24 11:57:26,783 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2018-10-24 11:57:26,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-24 11:57:26,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:26,784 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:26,784 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:26,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:26,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2007307685, now seen corresponding path program 55 times [2018-10-24 11:57:26,785 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:26,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:26,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:26,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:26,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 1596 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:28,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:28,234 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:28,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:28,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 1596 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:28,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:28,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-24 11:57:28,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-24 11:57:28,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-24 11:57:28,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=931, Invalid=2729, Unknown=0, NotChecked=0, Total=3660 [2018-10-24 11:57:28,375 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand 61 states. [2018-10-24 11:57:30,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:30,241 INFO L93 Difference]: Finished difference Result 301 states and 303 transitions. [2018-10-24 11:57:30,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-24 11:57:30,241 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 177 [2018-10-24 11:57:30,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:30,242 INFO L225 Difference]: With dead ends: 301 [2018-10-24 11:57:30,242 INFO L226 Difference]: Without dead ends: 180 [2018-10-24 11:57:30,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1921, Invalid=6269, Unknown=0, NotChecked=0, Total=8190 [2018-10-24 11:57:30,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-24 11:57:30,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2018-10-24 11:57:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-10-24 11:57:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2018-10-24 11:57:30,289 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 177 [2018-10-24 11:57:30,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:30,289 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2018-10-24 11:57:30,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-24 11:57:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2018-10-24 11:57:30,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-10-24 11:57:30,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:30,290 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:30,290 INFO L424 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:30,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:30,291 INFO L82 PathProgramCache]: Analyzing trace with hash 496870623, now seen corresponding path program 56 times [2018-10-24 11:57:30,291 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:30,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:30,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:30,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:30,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 870 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:30,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:30,782 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:30,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:57:30,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:57:30,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:30,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 870 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:30,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:30,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-10-24 11:57:30,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-24 11:57:30,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-24 11:57:30,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 11:57:30,974 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 35 states. [2018-10-24 11:57:31,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:31,721 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2018-10-24 11:57:31,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-24 11:57:31,722 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 179 [2018-10-24 11:57:31,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:31,723 INFO L225 Difference]: With dead ends: 193 [2018-10-24 11:57:31,723 INFO L226 Difference]: Without dead ends: 191 [2018-10-24 11:57:31,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1588, Invalid=2702, Unknown=0, NotChecked=0, Total=4290 [2018-10-24 11:57:31,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-24 11:57:31,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2018-10-24 11:57:31,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-24 11:57:31,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2018-10-24 11:57:31,766 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 179 [2018-10-24 11:57:31,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:31,766 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2018-10-24 11:57:31,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-24 11:57:31,766 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2018-10-24 11:57:31,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-24 11:57:31,767 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:31,768 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:31,768 INFO L424 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:31,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:31,768 INFO L82 PathProgramCache]: Analyzing trace with hash 592994856, now seen corresponding path program 57 times [2018-10-24 11:57:31,768 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:31,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:31,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:31,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:31,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 1711 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:33,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:33,277 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:33,284 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:57:33,388 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-24 11:57:33,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:33,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 1711 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:33,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:33,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-24 11:57:33,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-24 11:57:33,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-24 11:57:33,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=993, Invalid=2913, Unknown=0, NotChecked=0, Total=3906 [2018-10-24 11:57:33,463 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 63 states. [2018-10-24 11:57:35,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:35,566 INFO L93 Difference]: Finished difference Result 311 states and 313 transitions. [2018-10-24 11:57:35,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-24 11:57:35,566 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 183 [2018-10-24 11:57:35,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:35,568 INFO L225 Difference]: With dead ends: 311 [2018-10-24 11:57:35,568 INFO L226 Difference]: Without dead ends: 186 [2018-10-24 11:57:35,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2047, Invalid=6695, Unknown=0, NotChecked=0, Total=8742 [2018-10-24 11:57:35,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-24 11:57:35,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-10-24 11:57:35,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-10-24 11:57:35,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2018-10-24 11:57:35,613 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 183 [2018-10-24 11:57:35,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:35,613 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2018-10-24 11:57:35,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-24 11:57:35,613 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2018-10-24 11:57:35,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-10-24 11:57:35,614 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:35,614 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:35,614 INFO L424 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:35,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:35,614 INFO L82 PathProgramCache]: Analyzing trace with hash 110304738, now seen corresponding path program 58 times [2018-10-24 11:57:35,614 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:35,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:35,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:35,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:35,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 930 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:36,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:36,156 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:36,165 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:57:36,244 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:57:36,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:36,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 930 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:36,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:36,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-10-24 11:57:36,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-24 11:57:36,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-24 11:57:36,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-10-24 11:57:36,353 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 36 states. [2018-10-24 11:57:37,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:37,062 INFO L93 Difference]: Finished difference Result 199 states and 200 transitions. [2018-10-24 11:57:37,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-24 11:57:37,062 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 185 [2018-10-24 11:57:37,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:37,063 INFO L225 Difference]: With dead ends: 199 [2018-10-24 11:57:37,063 INFO L226 Difference]: Without dead ends: 197 [2018-10-24 11:57:37,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1687, Invalid=2869, Unknown=0, NotChecked=0, Total=4556 [2018-10-24 11:57:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-24 11:57:37,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2018-10-24 11:57:37,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-10-24 11:57:37,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2018-10-24 11:57:37,103 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 185 [2018-10-24 11:57:37,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:37,103 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2018-10-24 11:57:37,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-24 11:57:37,103 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2018-10-24 11:57:37,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-10-24 11:57:37,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:37,104 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:37,104 INFO L424 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:37,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:37,105 INFO L82 PathProgramCache]: Analyzing trace with hash 856924587, now seen corresponding path program 59 times [2018-10-24 11:57:37,105 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:37,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:37,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:37,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:37,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 1830 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:38,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:38,575 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:38,582 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:57:38,702 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-24 11:57:38,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:38,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 1830 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:38,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:38,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-24 11:57:38,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-24 11:57:38,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-24 11:57:38,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=3103, Unknown=0, NotChecked=0, Total=4160 [2018-10-24 11:57:38,777 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 65 states. [2018-10-24 11:57:40,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:40,899 INFO L93 Difference]: Finished difference Result 321 states and 323 transitions. [2018-10-24 11:57:40,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-24 11:57:40,899 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 189 [2018-10-24 11:57:40,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:40,900 INFO L225 Difference]: With dead ends: 321 [2018-10-24 11:57:40,900 INFO L226 Difference]: Without dead ends: 192 [2018-10-24 11:57:40,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2177, Invalid=7135, Unknown=0, NotChecked=0, Total=9312 [2018-10-24 11:57:40,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-10-24 11:57:40,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-10-24 11:57:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-24 11:57:40,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2018-10-24 11:57:40,952 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2018-10-24 11:57:40,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:40,952 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2018-10-24 11:57:40,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-24 11:57:40,952 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2018-10-24 11:57:40,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-24 11:57:40,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:40,953 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:40,954 INFO L424 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:40,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:40,954 INFO L82 PathProgramCache]: Analyzing trace with hash -547542555, now seen corresponding path program 60 times [2018-10-24 11:57:40,954 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:40,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:40,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:40,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:40,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 992 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:41,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:41,487 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:41,495 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:57:41,616 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-24 11:57:41,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:41,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 992 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:41,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:41,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-10-24 11:57:41,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-24 11:57:41,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-24 11:57:41,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 11:57:41,716 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand 37 states. [2018-10-24 11:57:42,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:42,481 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2018-10-24 11:57:42,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-24 11:57:42,481 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 191 [2018-10-24 11:57:42,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:42,482 INFO L225 Difference]: With dead ends: 205 [2018-10-24 11:57:42,482 INFO L226 Difference]: Without dead ends: 203 [2018-10-24 11:57:42,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1789, Invalid=3041, Unknown=0, NotChecked=0, Total=4830 [2018-10-24 11:57:42,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-24 11:57:42,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 196. [2018-10-24 11:57:42,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-24 11:57:42,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2018-10-24 11:57:42,524 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 191 [2018-10-24 11:57:42,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:42,525 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2018-10-24 11:57:42,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-24 11:57:42,525 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2018-10-24 11:57:42,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-24 11:57:42,526 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:42,526 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:42,526 INFO L424 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:42,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:42,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1075967022, now seen corresponding path program 61 times [2018-10-24 11:57:42,527 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:42,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:42,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:42,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:42,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2945 backedges. 1953 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:44,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:44,146 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:44,153 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:44,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2945 backedges. 1953 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:44,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:44,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-24 11:57:44,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-24 11:57:44,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-24 11:57:44,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1123, Invalid=3299, Unknown=0, NotChecked=0, Total=4422 [2018-10-24 11:57:44,292 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand 67 states. [2018-10-24 11:57:46,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:46,582 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2018-10-24 11:57:46,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-24 11:57:46,583 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 195 [2018-10-24 11:57:46,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:46,583 INFO L225 Difference]: With dead ends: 331 [2018-10-24 11:57:46,583 INFO L226 Difference]: Without dead ends: 198 [2018-10-24 11:57:46,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2311, Invalid=7589, Unknown=0, NotChecked=0, Total=9900 [2018-10-24 11:57:46,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-10-24 11:57:46,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-10-24 11:57:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-10-24 11:57:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2018-10-24 11:57:46,626 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 195 [2018-10-24 11:57:46,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:46,626 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2018-10-24 11:57:46,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-24 11:57:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2018-10-24 11:57:46,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-24 11:57:46,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:46,628 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:46,628 INFO L424 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:46,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:46,628 INFO L82 PathProgramCache]: Analyzing trace with hash 491710696, now seen corresponding path program 62 times [2018-10-24 11:57:46,628 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:46,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:46,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:46,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:46,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3009 backedges. 1056 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:47,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:47,195 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:47,204 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:57:47,291 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:57:47,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:47,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3009 backedges. 1056 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:47,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:47,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-10-24 11:57:47,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-24 11:57:47,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-24 11:57:47,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-10-24 11:57:47,471 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 38 states. [2018-10-24 11:57:48,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:48,501 INFO L93 Difference]: Finished difference Result 211 states and 212 transitions. [2018-10-24 11:57:48,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-24 11:57:48,501 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 197 [2018-10-24 11:57:48,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:48,502 INFO L225 Difference]: With dead ends: 211 [2018-10-24 11:57:48,502 INFO L226 Difference]: Without dead ends: 209 [2018-10-24 11:57:48,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1894, Invalid=3218, Unknown=0, NotChecked=0, Total=5112 [2018-10-24 11:57:48,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-24 11:57:48,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 202. [2018-10-24 11:57:48,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-10-24 11:57:48,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2018-10-24 11:57:48,552 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 197 [2018-10-24 11:57:48,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:48,552 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2018-10-24 11:57:48,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-24 11:57:48,552 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2018-10-24 11:57:48,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-10-24 11:57:48,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:48,553 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:48,553 INFO L424 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:48,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:48,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1589216847, now seen corresponding path program 63 times [2018-10-24 11:57:48,554 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:48,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:48,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:48,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:48,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 2080 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:49,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:49,885 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:49,893 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:57:50,019 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-24 11:57:50,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:50,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 2080 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:50,101 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:50,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-24 11:57:50,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-24 11:57:50,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-24 11:57:50,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1191, Invalid=3501, Unknown=0, NotChecked=0, Total=4692 [2018-10-24 11:57:50,103 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 69 states. [2018-10-24 11:57:52,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:52,540 INFO L93 Difference]: Finished difference Result 341 states and 343 transitions. [2018-10-24 11:57:52,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-24 11:57:52,541 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 201 [2018-10-24 11:57:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:52,541 INFO L225 Difference]: With dead ends: 341 [2018-10-24 11:57:52,541 INFO L226 Difference]: Without dead ends: 204 [2018-10-24 11:57:52,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2449, Invalid=8057, Unknown=0, NotChecked=0, Total=10506 [2018-10-24 11:57:52,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-24 11:57:52,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2018-10-24 11:57:52,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-10-24 11:57:52,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2018-10-24 11:57:52,586 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 201 [2018-10-24 11:57:52,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:52,586 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2018-10-24 11:57:52,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-24 11:57:52,587 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2018-10-24 11:57:52,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-24 11:57:52,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:52,587 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:52,588 INFO L424 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:52,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:52,588 INFO L82 PathProgramCache]: Analyzing trace with hash -852264213, now seen corresponding path program 64 times [2018-10-24 11:57:52,588 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:52,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:52,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:52,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:52,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:53,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 1122 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:53,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:53,377 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:53,397 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:57:53,485 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:57:53,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:53,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 1122 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:53,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:53,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-10-24 11:57:53,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-24 11:57:53,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-24 11:57:53,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2018-10-24 11:57:53,775 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 39 states. [2018-10-24 11:57:54,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:54,619 INFO L93 Difference]: Finished difference Result 217 states and 218 transitions. [2018-10-24 11:57:54,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-24 11:57:54,620 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 203 [2018-10-24 11:57:54,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:54,621 INFO L225 Difference]: With dead ends: 217 [2018-10-24 11:57:54,622 INFO L226 Difference]: Without dead ends: 215 [2018-10-24 11:57:54,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2002, Invalid=3400, Unknown=0, NotChecked=0, Total=5402 [2018-10-24 11:57:54,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-10-24 11:57:54,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 208. [2018-10-24 11:57:54,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-24 11:57:54,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2018-10-24 11:57:54,683 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 203 [2018-10-24 11:57:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:54,683 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2018-10-24 11:57:54,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-24 11:57:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2018-10-24 11:57:54,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-24 11:57:54,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:54,684 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:54,685 INFO L424 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:54,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:54,685 INFO L82 PathProgramCache]: Analyzing trace with hash -927182284, now seen corresponding path program 65 times [2018-10-24 11:57:54,685 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:54,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:54,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:54,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:54,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:56,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3333 backedges. 2211 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:56,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:56,190 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:56,196 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:57:56,327 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-24 11:57:56,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:56,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3333 backedges. 2211 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:56,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:56,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-24 11:57:56,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-24 11:57:56,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-24 11:57:56,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1261, Invalid=3709, Unknown=0, NotChecked=0, Total=4970 [2018-10-24 11:57:56,403 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand 71 states. [2018-10-24 11:57:59,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:59,207 INFO L93 Difference]: Finished difference Result 351 states and 353 transitions. [2018-10-24 11:57:59,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-24 11:57:59,207 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 207 [2018-10-24 11:57:59,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:59,208 INFO L225 Difference]: With dead ends: 351 [2018-10-24 11:57:59,208 INFO L226 Difference]: Without dead ends: 210 [2018-10-24 11:57:59,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2591, Invalid=8539, Unknown=0, NotChecked=0, Total=11130 [2018-10-24 11:57:59,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-10-24 11:57:59,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-10-24 11:57:59,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-10-24 11:57:59,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2018-10-24 11:57:59,264 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 207 [2018-10-24 11:57:59,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:59,265 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2018-10-24 11:57:59,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-24 11:57:59,265 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2018-10-24 11:57:59,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-24 11:57:59,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:59,266 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:59,266 INFO L424 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:59,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:59,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1900937198, now seen corresponding path program 66 times [2018-10-24 11:57:59,266 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:59,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:59,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:59,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:59,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 1190 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:57:59,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:59,882 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:59,889 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:58:00,017 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-10-24 11:58:00,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:00,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 1190 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:00,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:00,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-10-24 11:58:00,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-24 11:58:00,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-24 11:58:00,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:58:00,100 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand 40 states. [2018-10-24 11:58:00,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:00,959 INFO L93 Difference]: Finished difference Result 223 states and 224 transitions. [2018-10-24 11:58:00,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-24 11:58:00,959 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 209 [2018-10-24 11:58:00,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:00,960 INFO L225 Difference]: With dead ends: 223 [2018-10-24 11:58:00,960 INFO L226 Difference]: Without dead ends: 221 [2018-10-24 11:58:00,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2113, Invalid=3587, Unknown=0, NotChecked=0, Total=5700 [2018-10-24 11:58:00,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-24 11:58:01,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 214. [2018-10-24 11:58:01,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-10-24 11:58:01,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2018-10-24 11:58:01,020 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 209 [2018-10-24 11:58:01,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:01,021 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2018-10-24 11:58:01,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-24 11:58:01,021 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2018-10-24 11:58:01,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-24 11:58:01,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:01,022 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:01,022 INFO L424 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:01,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:01,023 INFO L82 PathProgramCache]: Analyzing trace with hash 574004663, now seen corresponding path program 67 times [2018-10-24 11:58:01,023 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:01,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:01,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:01,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:01,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 2346 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:02,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:02,522 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:02,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:02,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 2346 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:02,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:02,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-24 11:58:02,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-24 11:58:02,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-24 11:58:02,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=3923, Unknown=0, NotChecked=0, Total=5256 [2018-10-24 11:58:02,684 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 73 states. [2018-10-24 11:58:05,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:05,546 INFO L93 Difference]: Finished difference Result 361 states and 363 transitions. [2018-10-24 11:58:05,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-24 11:58:05,547 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 213 [2018-10-24 11:58:05,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:05,548 INFO L225 Difference]: With dead ends: 361 [2018-10-24 11:58:05,548 INFO L226 Difference]: Without dead ends: 216 [2018-10-24 11:58:05,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2737, Invalid=9035, Unknown=0, NotChecked=0, Total=11772 [2018-10-24 11:58:05,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-10-24 11:58:05,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-10-24 11:58:05,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-10-24 11:58:05,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2018-10-24 11:58:05,597 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 213 [2018-10-24 11:58:05,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:05,598 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2018-10-24 11:58:05,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-24 11:58:05,598 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2018-10-24 11:58:05,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-10-24 11:58:05,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:05,599 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:05,599 INFO L424 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:05,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:05,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1599707121, now seen corresponding path program 68 times [2018-10-24 11:58:05,600 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:05,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:05,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:05,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:05,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3606 backedges. 1260 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:06,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:06,282 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:06,288 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:58:06,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:58:06,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:06,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3606 backedges. 1260 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:06,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:06,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-10-24 11:58:06,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-24 11:58:06,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-24 11:58:06,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2018-10-24 11:58:06,498 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand 41 states. [2018-10-24 11:58:07,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:07,374 INFO L93 Difference]: Finished difference Result 229 states and 230 transitions. [2018-10-24 11:58:07,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-24 11:58:07,374 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 215 [2018-10-24 11:58:07,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:07,375 INFO L225 Difference]: With dead ends: 229 [2018-10-24 11:58:07,375 INFO L226 Difference]: Without dead ends: 227 [2018-10-24 11:58:07,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2227, Invalid=3779, Unknown=0, NotChecked=0, Total=6006 [2018-10-24 11:58:07,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-24 11:58:07,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2018-10-24 11:58:07,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-24 11:58:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2018-10-24 11:58:07,428 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 215 [2018-10-24 11:58:07,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:07,429 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2018-10-24 11:58:07,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-24 11:58:07,429 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2018-10-24 11:58:07,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-24 11:58:07,429 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:07,430 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:07,430 INFO L424 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:07,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:07,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1893760058, now seen corresponding path program 69 times [2018-10-24 11:58:07,430 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:07,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:07,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:07,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:07,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3745 backedges. 2485 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:09,319 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:09,319 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:09,326 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:58:09,459 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-24 11:58:09,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:09,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3745 backedges. 2485 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:09,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:09,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-24 11:58:09,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-24 11:58:09,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-24 11:58:09,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1407, Invalid=4143, Unknown=0, NotChecked=0, Total=5550 [2018-10-24 11:58:09,528 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand 75 states. [2018-10-24 11:58:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:12,397 INFO L93 Difference]: Finished difference Result 371 states and 373 transitions. [2018-10-24 11:58:12,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-24 11:58:12,397 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 219 [2018-10-24 11:58:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:12,398 INFO L225 Difference]: With dead ends: 371 [2018-10-24 11:58:12,398 INFO L226 Difference]: Without dead ends: 222 [2018-10-24 11:58:12,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1925 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2887, Invalid=9545, Unknown=0, NotChecked=0, Total=12432 [2018-10-24 11:58:12,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-24 11:58:12,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2018-10-24 11:58:12,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-10-24 11:58:12,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2018-10-24 11:58:12,451 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 219 [2018-10-24 11:58:12,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:12,451 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2018-10-24 11:58:12,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-24 11:58:12,451 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2018-10-24 11:58:12,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-24 11:58:12,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:12,452 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:12,452 INFO L424 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:12,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:12,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1635163404, now seen corresponding path program 70 times [2018-10-24 11:58:12,452 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:12,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:12,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:12,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:12,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3817 backedges. 1332 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:13,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:13,137 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:13,144 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:58:13,242 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:58:13,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:13,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3817 backedges. 1332 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:13,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:13,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-10-24 11:58:13,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-24 11:58:13,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-24 11:58:13,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-10-24 11:58:13,374 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 42 states. [2018-10-24 11:58:14,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:14,561 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2018-10-24 11:58:14,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-24 11:58:14,561 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 221 [2018-10-24 11:58:14,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:14,562 INFO L225 Difference]: With dead ends: 235 [2018-10-24 11:58:14,562 INFO L226 Difference]: Without dead ends: 233 [2018-10-24 11:58:14,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2344, Invalid=3976, Unknown=0, NotChecked=0, Total=6320 [2018-10-24 11:58:14,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-10-24 11:58:14,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2018-10-24 11:58:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-10-24 11:58:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2018-10-24 11:58:14,618 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 221 [2018-10-24 11:58:14,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:14,618 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2018-10-24 11:58:14,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-24 11:58:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2018-10-24 11:58:14,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-10-24 11:58:14,619 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:14,619 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:14,619 INFO L424 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:14,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:14,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1386410563, now seen corresponding path program 71 times [2018-10-24 11:58:14,620 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:14,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:14,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:14,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:14,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2628 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:16,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:16,414 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:16,420 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:58:16,563 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-24 11:58:16,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:16,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2628 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:16,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:16,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-24 11:58:16,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-24 11:58:16,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-24 11:58:16,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=4369, Unknown=0, NotChecked=0, Total=5852 [2018-10-24 11:58:16,647 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand 77 states. [2018-10-24 11:58:18,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:18,982 INFO L93 Difference]: Finished difference Result 381 states and 383 transitions. [2018-10-24 11:58:18,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-24 11:58:18,982 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 225 [2018-10-24 11:58:18,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:18,983 INFO L225 Difference]: With dead ends: 381 [2018-10-24 11:58:18,983 INFO L226 Difference]: Without dead ends: 228 [2018-10-24 11:58:18,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3041, Invalid=10069, Unknown=0, NotChecked=0, Total=13110 [2018-10-24 11:58:18,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-24 11:58:19,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-10-24 11:58:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-10-24 11:58:19,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 229 transitions. [2018-10-24 11:58:19,043 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 229 transitions. Word has length 225 [2018-10-24 11:58:19,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:19,043 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 229 transitions. [2018-10-24 11:58:19,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-24 11:58:19,044 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 229 transitions. [2018-10-24 11:58:19,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-10-24 11:58:19,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:19,045 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:19,045 INFO L424 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:19,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:19,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1166573815, now seen corresponding path program 72 times [2018-10-24 11:58:19,045 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:19,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:19,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:19,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:19,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4034 backedges. 1406 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:19,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:19,771 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:19,779 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:58:19,929 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-24 11:58:19,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:19,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4034 backedges. 1406 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:20,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:20,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-10-24 11:58:20,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-24 11:58:20,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-24 11:58:20,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 11:58:20,055 INFO L87 Difference]: Start difference. First operand 228 states and 229 transitions. Second operand 43 states. [2018-10-24 11:58:21,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:21,010 INFO L93 Difference]: Finished difference Result 241 states and 242 transitions. [2018-10-24 11:58:21,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-24 11:58:21,011 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 227 [2018-10-24 11:58:21,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:21,012 INFO L225 Difference]: With dead ends: 241 [2018-10-24 11:58:21,012 INFO L226 Difference]: Without dead ends: 239 [2018-10-24 11:58:21,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2464, Invalid=4178, Unknown=0, NotChecked=0, Total=6642 [2018-10-24 11:58:21,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-24 11:58:21,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 232. [2018-10-24 11:58:21,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-24 11:58:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2018-10-24 11:58:21,070 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 227 [2018-10-24 11:58:21,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:21,070 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2018-10-24 11:58:21,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-24 11:58:21,070 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2018-10-24 11:58:21,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-24 11:58:21,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:21,071 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:21,071 INFO L424 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:21,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:21,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1674015296, now seen corresponding path program 73 times [2018-10-24 11:58:21,071 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:21,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:21,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:21,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:21,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4181 backedges. 2775 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:22,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:22,778 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:22,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:22,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4181 backedges. 2775 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:22,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:22,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-24 11:58:22,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-24 11:58:22,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-24 11:58:22,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1561, Invalid=4601, Unknown=0, NotChecked=0, Total=6162 [2018-10-24 11:58:22,966 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand 79 states. [2018-10-24 11:58:26,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:26,392 INFO L93 Difference]: Finished difference Result 391 states and 393 transitions. [2018-10-24 11:58:26,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-24 11:58:26,392 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 231 [2018-10-24 11:58:26,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:26,393 INFO L225 Difference]: With dead ends: 391 [2018-10-24 11:58:26,393 INFO L226 Difference]: Without dead ends: 234 [2018-10-24 11:58:26,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3199, Invalid=10607, Unknown=0, NotChecked=0, Total=13806 [2018-10-24 11:58:26,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-24 11:58:26,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2018-10-24 11:58:26,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-10-24 11:58:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2018-10-24 11:58:26,459 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 231 [2018-10-24 11:58:26,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:26,459 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2018-10-24 11:58:26,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-24 11:58:26,460 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2018-10-24 11:58:26,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-10-24 11:58:26,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:26,460 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:26,461 INFO L424 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:26,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:26,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1484395002, now seen corresponding path program 74 times [2018-10-24 11:58:26,461 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:26,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:26,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:26,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:26,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4257 backedges. 1482 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:27,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:27,229 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:27,237 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:58:27,329 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:58:27,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:27,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4257 backedges. 1482 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:27,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:27,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-10-24 11:58:27,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-24 11:58:27,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-24 11:58:27,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 11:58:27,441 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 44 states. [2018-10-24 11:58:28,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:28,436 INFO L93 Difference]: Finished difference Result 247 states and 248 transitions. [2018-10-24 11:58:28,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-24 11:58:28,437 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 233 [2018-10-24 11:58:28,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:28,438 INFO L225 Difference]: With dead ends: 247 [2018-10-24 11:58:28,438 INFO L226 Difference]: Without dead ends: 245 [2018-10-24 11:58:28,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2587, Invalid=4385, Unknown=0, NotChecked=0, Total=6972 [2018-10-24 11:58:28,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-10-24 11:58:28,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 238. [2018-10-24 11:58:28,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-10-24 11:58:28,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 239 transitions. [2018-10-24 11:58:28,500 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 239 transitions. Word has length 233 [2018-10-24 11:58:28,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:28,500 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 239 transitions. [2018-10-24 11:58:28,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-24 11:58:28,500 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 239 transitions. [2018-10-24 11:58:28,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-10-24 11:58:28,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:28,501 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:28,501 INFO L424 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:28,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:28,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1850553917, now seen corresponding path program 75 times [2018-10-24 11:58:28,502 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:28,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:28,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:28,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:28,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 2926 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:30,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:30,625 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:30,632 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:58:30,792 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-24 11:58:30,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:30,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 2926 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:30,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:30,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-24 11:58:30,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-24 11:58:30,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-24 11:58:30,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1641, Invalid=4839, Unknown=0, NotChecked=0, Total=6480 [2018-10-24 11:58:30,870 INFO L87 Difference]: Start difference. First operand 238 states and 239 transitions. Second operand 81 states. [2018-10-24 11:58:33,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:33,316 INFO L93 Difference]: Finished difference Result 401 states and 403 transitions. [2018-10-24 11:58:33,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-24 11:58:33,316 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 237 [2018-10-24 11:58:33,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:33,317 INFO L225 Difference]: With dead ends: 401 [2018-10-24 11:58:33,317 INFO L226 Difference]: Without dead ends: 240 [2018-10-24 11:58:33,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3361, Invalid=11159, Unknown=0, NotChecked=0, Total=14520 [2018-10-24 11:58:33,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-10-24 11:58:33,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2018-10-24 11:58:33,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-10-24 11:58:33,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2018-10-24 11:58:33,378 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 237 [2018-10-24 11:58:33,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:33,379 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2018-10-24 11:58:33,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-24 11:58:33,379 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2018-10-24 11:58:33,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-10-24 11:58:33,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:33,380 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 38, 38, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:33,380 INFO L424 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:33,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:33,380 INFO L82 PathProgramCache]: Analyzing trace with hash 653866493, now seen corresponding path program 76 times [2018-10-24 11:58:33,381 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:33,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:33,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:33,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:33,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 1560 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:34,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:34,429 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:34,436 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:58:34,538 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:58:34,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:34,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 1560 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:34,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:34,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-10-24 11:58:34,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-24 11:58:34,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-24 11:58:34,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2018-10-24 11:58:34,655 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand 45 states. [2018-10-24 11:58:35,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:35,747 INFO L93 Difference]: Finished difference Result 253 states and 254 transitions. [2018-10-24 11:58:35,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-24 11:58:35,747 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 239 [2018-10-24 11:58:35,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:35,748 INFO L225 Difference]: With dead ends: 253 [2018-10-24 11:58:35,748 INFO L226 Difference]: Without dead ends: 251 [2018-10-24 11:58:35,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2713, Invalid=4597, Unknown=0, NotChecked=0, Total=7310 [2018-10-24 11:58:35,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-10-24 11:58:35,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 244. [2018-10-24 11:58:35,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-24 11:58:35,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2018-10-24 11:58:35,813 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 239 [2018-10-24 11:58:35,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:35,813 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2018-10-24 11:58:35,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-24 11:58:35,813 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2018-10-24 11:58:35,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-24 11:58:35,814 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:35,814 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:35,814 INFO L424 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:35,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:35,814 INFO L82 PathProgramCache]: Analyzing trace with hash 69874758, now seen corresponding path program 77 times [2018-10-24 11:58:35,814 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:35,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:35,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:35,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:35,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4641 backedges. 3081 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:37,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:37,794 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:37,800 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:58:37,953 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-24 11:58:37,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:37,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4641 backedges. 3081 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:38,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:38,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-24 11:58:38,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-24 11:58:38,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-24 11:58:38,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1723, Invalid=5083, Unknown=0, NotChecked=0, Total=6806 [2018-10-24 11:58:38,031 INFO L87 Difference]: Start difference. First operand 244 states and 245 transitions. Second operand 83 states. [2018-10-24 11:58:41,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:41,423 INFO L93 Difference]: Finished difference Result 411 states and 413 transitions. [2018-10-24 11:58:41,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-24 11:58:41,423 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 243 [2018-10-24 11:58:41,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:41,424 INFO L225 Difference]: With dead ends: 411 [2018-10-24 11:58:41,424 INFO L226 Difference]: Without dead ends: 246 [2018-10-24 11:58:41,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2379 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3527, Invalid=11725, Unknown=0, NotChecked=0, Total=15252 [2018-10-24 11:58:41,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-24 11:58:41,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-10-24 11:58:41,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-10-24 11:58:41,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2018-10-24 11:58:41,488 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 243 [2018-10-24 11:58:41,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:41,489 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2018-10-24 11:58:41,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-24 11:58:41,489 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2018-10-24 11:58:41,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-10-24 11:58:41,489 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:41,490 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 39, 39, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:41,490 INFO L424 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:41,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:41,490 INFO L82 PathProgramCache]: Analyzing trace with hash 706284800, now seen corresponding path program 78 times [2018-10-24 11:58:41,490 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:41,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:41,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:41,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:41,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4721 backedges. 1640 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:42,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:42,307 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:42,314 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:58:42,471 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-10-24 11:58:42,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:42,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4721 backedges. 1640 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:42,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:42,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-10-24 11:58:42,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-24 11:58:42,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-24 11:58:42,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-10-24 11:58:42,591 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand 46 states. [2018-10-24 11:58:43,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:43,756 INFO L93 Difference]: Finished difference Result 259 states and 260 transitions. [2018-10-24 11:58:43,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-24 11:58:43,757 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 245 [2018-10-24 11:58:43,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:43,758 INFO L225 Difference]: With dead ends: 259 [2018-10-24 11:58:43,758 INFO L226 Difference]: Without dead ends: 257 [2018-10-24 11:58:43,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2842, Invalid=4814, Unknown=0, NotChecked=0, Total=7656 [2018-10-24 11:58:43,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-10-24 11:58:43,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2018-10-24 11:58:43,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-10-24 11:58:43,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2018-10-24 11:58:43,824 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 245 [2018-10-24 11:58:43,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:43,824 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2018-10-24 11:58:43,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-24 11:58:43,825 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2018-10-24 11:58:43,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-10-24 11:58:43,825 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:43,825 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:43,826 INFO L424 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:43,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:43,826 INFO L82 PathProgramCache]: Analyzing trace with hash 900780489, now seen corresponding path program 79 times [2018-10-24 11:58:43,826 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:43,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:43,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:43,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:43,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4880 backedges. 3240 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:46,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:46,014 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:46,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:46,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4880 backedges. 3240 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:46,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:46,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-24 11:58:46,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-24 11:58:46,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-24 11:58:46,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1807, Invalid=5333, Unknown=0, NotChecked=0, Total=7140 [2018-10-24 11:58:46,241 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand 85 states. [2018-10-24 11:58:48,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:48,461 INFO L93 Difference]: Finished difference Result 421 states and 423 transitions. [2018-10-24 11:58:48,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-24 11:58:48,461 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 249 [2018-10-24 11:58:48,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:48,462 INFO L225 Difference]: With dead ends: 421 [2018-10-24 11:58:48,462 INFO L226 Difference]: Without dead ends: 252 [2018-10-24 11:58:48,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2500 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3697, Invalid=12305, Unknown=0, NotChecked=0, Total=16002 [2018-10-24 11:58:48,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-10-24 11:58:48,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2018-10-24 11:58:48,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-10-24 11:58:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2018-10-24 11:58:48,530 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 249 [2018-10-24 11:58:48,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:48,531 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2018-10-24 11:58:48,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-24 11:58:48,531 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2018-10-24 11:58:48,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-10-24 11:58:48,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:48,532 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 40, 40, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:48,532 INFO L424 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:48,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:48,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1650767619, now seen corresponding path program 80 times [2018-10-24 11:58:48,532 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:48,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:48,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:48,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:58:48,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4962 backedges. 1722 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:49,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:49,389 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:49,397 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:58:49,502 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:58:49,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:49,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4962 backedges. 1722 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:49,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:49,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-10-24 11:58:49,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-24 11:58:49,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-24 11:58:49,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2018-10-24 11:58:49,613 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand 47 states. [2018-10-24 11:58:50,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:50,778 INFO L93 Difference]: Finished difference Result 265 states and 266 transitions. [2018-10-24 11:58:50,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-24 11:58:50,778 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 251 [2018-10-24 11:58:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:50,780 INFO L225 Difference]: With dead ends: 265 [2018-10-24 11:58:50,780 INFO L226 Difference]: Without dead ends: 263 [2018-10-24 11:58:50,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2974, Invalid=5036, Unknown=0, NotChecked=0, Total=8010 [2018-10-24 11:58:50,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-10-24 11:58:50,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 256. [2018-10-24 11:58:50,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-24 11:58:50,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 257 transitions. [2018-10-24 11:58:50,864 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 257 transitions. Word has length 251 [2018-10-24 11:58:50,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:50,864 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 257 transitions. [2018-10-24 11:58:50,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-24 11:58:50,864 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 257 transitions. [2018-10-24 11:58:50,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-24 11:58:50,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:50,865 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:50,865 INFO L424 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:50,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:50,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1404976564, now seen corresponding path program 81 times [2018-10-24 11:58:50,866 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:50,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:50,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:50,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:50,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5125 backedges. 3403 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:52,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:52,932 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:52,940 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:58:53,120 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-24 11:58:53,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:53,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5125 backedges. 3403 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:53,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:53,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-24 11:58:53,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-24 11:58:53,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-24 11:58:53,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=5589, Unknown=0, NotChecked=0, Total=7482 [2018-10-24 11:58:53,204 INFO L87 Difference]: Start difference. First operand 256 states and 257 transitions. Second operand 87 states. [2018-10-24 11:58:55,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:55,446 INFO L93 Difference]: Finished difference Result 431 states and 433 transitions. [2018-10-24 11:58:55,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-24 11:58:55,446 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 255 [2018-10-24 11:58:55,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:55,447 INFO L225 Difference]: With dead ends: 431 [2018-10-24 11:58:55,448 INFO L226 Difference]: Without dead ends: 258 [2018-10-24 11:58:55,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3871, Invalid=12899, Unknown=0, NotChecked=0, Total=16770 [2018-10-24 11:58:55,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-10-24 11:58:55,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2018-10-24 11:58:55,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-10-24 11:58:55,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2018-10-24 11:58:55,525 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 255 [2018-10-24 11:58:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:55,525 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2018-10-24 11:58:55,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-24 11:58:55,526 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2018-10-24 11:58:55,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-10-24 11:58:55,526 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:55,526 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:55,527 INFO L424 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:55,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:55,527 INFO L82 PathProgramCache]: Analyzing trace with hash 903828486, now seen corresponding path program 82 times [2018-10-24 11:58:55,527 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:55,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:55,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:55,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:55,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5209 backedges. 1806 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:56,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:56,388 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:56,395 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:58:56,506 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:58:56,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:56,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5209 backedges. 1806 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:58:56,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:56,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-10-24 11:58:56,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-24 11:58:56,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-24 11:58:56,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-10-24 11:58:56,645 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand 48 states. [2018-10-24 11:58:57,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:57,818 INFO L93 Difference]: Finished difference Result 271 states and 272 transitions. [2018-10-24 11:58:57,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-24 11:58:57,819 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 257 [2018-10-24 11:58:57,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:57,820 INFO L225 Difference]: With dead ends: 271 [2018-10-24 11:58:57,820 INFO L226 Difference]: Without dead ends: 269 [2018-10-24 11:58:57,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3109, Invalid=5263, Unknown=0, NotChecked=0, Total=8372 [2018-10-24 11:58:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-10-24 11:58:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 262. [2018-10-24 11:58:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-10-24 11:58:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2018-10-24 11:58:57,890 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 257 [2018-10-24 11:58:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:57,891 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2018-10-24 11:58:57,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-24 11:58:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2018-10-24 11:58:57,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-10-24 11:58:57,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:57,892 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:57,892 INFO L424 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:57,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:57,893 INFO L82 PathProgramCache]: Analyzing trace with hash -682613297, now seen corresponding path program 83 times [2018-10-24 11:58:57,893 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:57,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:57,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:57,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:57,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5376 backedges. 3570 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:00,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:00,312 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:00,320 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:59:00,491 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-24 11:59:00,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:00,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5376 backedges. 3570 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:00,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:00,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-24 11:59:00,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-24 11:59:00,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-24 11:59:00,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1981, Invalid=5851, Unknown=0, NotChecked=0, Total=7832 [2018-10-24 11:59:00,577 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand 89 states. [2018-10-24 11:59:03,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:03,533 INFO L93 Difference]: Finished difference Result 441 states and 443 transitions. [2018-10-24 11:59:03,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-24 11:59:03,534 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 261 [2018-10-24 11:59:03,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:03,535 INFO L225 Difference]: With dead ends: 441 [2018-10-24 11:59:03,535 INFO L226 Difference]: Without dead ends: 264 [2018-10-24 11:59:03,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2751 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4049, Invalid=13507, Unknown=0, NotChecked=0, Total=17556 [2018-10-24 11:59:03,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-10-24 11:59:03,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2018-10-24 11:59:03,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-10-24 11:59:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 265 transitions. [2018-10-24 11:59:03,610 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 265 transitions. Word has length 261 [2018-10-24 11:59:03,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:03,610 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 265 transitions. [2018-10-24 11:59:03,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-24 11:59:03,610 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 265 transitions. [2018-10-24 11:59:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-10-24 11:59:03,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:03,612 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 42, 42, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:03,612 INFO L424 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:03,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:03,612 INFO L82 PathProgramCache]: Analyzing trace with hash -838597623, now seen corresponding path program 84 times [2018-10-24 11:59:03,613 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:03,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:03,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:03,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:03,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:04,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5462 backedges. 1892 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:04,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:04,551 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:04,560 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:59:04,733 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-10-24 11:59:04,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:04,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5462 backedges. 1892 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:04,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:04,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-10-24 11:59:04,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-24 11:59:04,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-24 11:59:04,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2018-10-24 11:59:04,950 INFO L87 Difference]: Start difference. First operand 264 states and 265 transitions. Second operand 49 states. [2018-10-24 11:59:06,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:06,244 INFO L93 Difference]: Finished difference Result 277 states and 278 transitions. [2018-10-24 11:59:06,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-24 11:59:06,245 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 263 [2018-10-24 11:59:06,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:06,246 INFO L225 Difference]: With dead ends: 277 [2018-10-24 11:59:06,246 INFO L226 Difference]: Without dead ends: 275 [2018-10-24 11:59:06,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3247, Invalid=5495, Unknown=0, NotChecked=0, Total=8742 [2018-10-24 11:59:06,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-10-24 11:59:06,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 268. [2018-10-24 11:59:06,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-24 11:59:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 269 transitions. [2018-10-24 11:59:06,324 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 269 transitions. Word has length 263 [2018-10-24 11:59:06,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:06,324 INFO L481 AbstractCegarLoop]: Abstraction has 268 states and 269 transitions. [2018-10-24 11:59:06,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-24 11:59:06,324 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 269 transitions. [2018-10-24 11:59:06,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-24 11:59:06,325 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:06,326 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:06,326 INFO L424 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:06,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:06,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1841765458, now seen corresponding path program 85 times [2018-10-24 11:59:06,326 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:06,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:06,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:06,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:06,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5633 backedges. 3741 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:08,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:08,668 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:08,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:08,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5633 backedges. 3741 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:08,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:08,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-24 11:59:08,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-24 11:59:08,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-24 11:59:08,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2071, Invalid=6119, Unknown=0, NotChecked=0, Total=8190 [2018-10-24 11:59:08,873 INFO L87 Difference]: Start difference. First operand 268 states and 269 transitions. Second operand 91 states. [2018-10-24 11:59:12,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:12,329 INFO L93 Difference]: Finished difference Result 451 states and 453 transitions. [2018-10-24 11:59:12,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-24 11:59:12,330 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 267 [2018-10-24 11:59:12,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:12,331 INFO L225 Difference]: With dead ends: 451 [2018-10-24 11:59:12,331 INFO L226 Difference]: Without dead ends: 270 [2018-10-24 11:59:12,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4231, Invalid=14129, Unknown=0, NotChecked=0, Total=18360 [2018-10-24 11:59:12,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-10-24 11:59:12,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2018-10-24 11:59:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-10-24 11:59:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 271 transitions. [2018-10-24 11:59:12,405 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 271 transitions. Word has length 267 [2018-10-24 11:59:12,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:12,406 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 271 transitions. [2018-10-24 11:59:12,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-24 11:59:12,406 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 271 transitions. [2018-10-24 11:59:12,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2018-10-24 11:59:12,407 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:12,407 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 43, 43, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:12,407 INFO L424 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:12,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:12,407 INFO L82 PathProgramCache]: Analyzing trace with hash -171579636, now seen corresponding path program 86 times [2018-10-24 11:59:12,407 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:12,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:12,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:12,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:12,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5721 backedges. 1980 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:13,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:13,421 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:13,428 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:59:13,539 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:59:13,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:13,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5721 backedges. 1980 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:13,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:13,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2018-10-24 11:59:13,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-24 11:59:13,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-24 11:59:13,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2018-10-24 11:59:13,669 INFO L87 Difference]: Start difference. First operand 270 states and 271 transitions. Second operand 50 states. [2018-10-24 11:59:14,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:14,937 INFO L93 Difference]: Finished difference Result 283 states and 284 transitions. [2018-10-24 11:59:14,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-24 11:59:14,938 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 269 [2018-10-24 11:59:14,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:14,939 INFO L225 Difference]: With dead ends: 283 [2018-10-24 11:59:14,939 INFO L226 Difference]: Without dead ends: 281 [2018-10-24 11:59:14,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3388, Invalid=5732, Unknown=0, NotChecked=0, Total=9120 [2018-10-24 11:59:14,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-10-24 11:59:15,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 274. [2018-10-24 11:59:15,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2018-10-24 11:59:15,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 275 transitions. [2018-10-24 11:59:15,023 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 275 transitions. Word has length 269 [2018-10-24 11:59:15,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:15,023 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 275 transitions. [2018-10-24 11:59:15,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-24 11:59:15,023 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 275 transitions. [2018-10-24 11:59:15,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2018-10-24 11:59:15,024 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:15,024 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:15,024 INFO L424 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:15,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:15,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1275708885, now seen corresponding path program 87 times [2018-10-24 11:59:15,024 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:15,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:15,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:15,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:15,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5896 backedges. 3916 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:17,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:17,601 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:17,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:59:17,794 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-24 11:59:17,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:17,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5896 backedges. 3916 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:17,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:17,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-24 11:59:17,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-24 11:59:17,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-24 11:59:17,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2163, Invalid=6393, Unknown=0, NotChecked=0, Total=8556 [2018-10-24 11:59:17,887 INFO L87 Difference]: Start difference. First operand 274 states and 275 transitions. Second operand 93 states. [2018-10-24 11:59:21,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:21,472 INFO L93 Difference]: Finished difference Result 461 states and 463 transitions. [2018-10-24 11:59:21,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-24 11:59:21,472 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 273 [2018-10-24 11:59:21,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:21,473 INFO L225 Difference]: With dead ends: 461 [2018-10-24 11:59:21,473 INFO L226 Difference]: Without dead ends: 276 [2018-10-24 11:59:21,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3014 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4417, Invalid=14765, Unknown=0, NotChecked=0, Total=19182 [2018-10-24 11:59:21,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-10-24 11:59:21,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2018-10-24 11:59:21,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-10-24 11:59:21,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 277 transitions. [2018-10-24 11:59:21,548 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 277 transitions. Word has length 273 [2018-10-24 11:59:21,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:21,549 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 277 transitions. [2018-10-24 11:59:21,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-24 11:59:21,549 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 277 transitions. [2018-10-24 11:59:21,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-10-24 11:59:21,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:21,550 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 44, 44, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:21,550 INFO L424 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:21,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:21,550 INFO L82 PathProgramCache]: Analyzing trace with hash 2005933327, now seen corresponding path program 88 times [2018-10-24 11:59:21,550 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:21,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:21,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:21,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:21,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:21,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 2070 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:22,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:22,580 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:22,587 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:59:22,722 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:59:22,722 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:22,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5986 backedges. 2070 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:22,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:22,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-10-24 11:59:22,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-24 11:59:22,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-24 11:59:22,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2018-10-24 11:59:22,886 INFO L87 Difference]: Start difference. First operand 276 states and 277 transitions. Second operand 51 states. [2018-10-24 11:59:24,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:24,230 INFO L93 Difference]: Finished difference Result 289 states and 290 transitions. [2018-10-24 11:59:24,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-24 11:59:24,230 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 275 [2018-10-24 11:59:24,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:24,232 INFO L225 Difference]: With dead ends: 289 [2018-10-24 11:59:24,232 INFO L226 Difference]: Without dead ends: 287 [2018-10-24 11:59:24,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2253 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3532, Invalid=5974, Unknown=0, NotChecked=0, Total=9506 [2018-10-24 11:59:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-10-24 11:59:24,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 280. [2018-10-24 11:59:24,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-24 11:59:24,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 281 transitions. [2018-10-24 11:59:24,318 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 281 transitions. Word has length 275 [2018-10-24 11:59:24,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:24,318 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 281 transitions. [2018-10-24 11:59:24,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-24 11:59:24,318 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 281 transitions. [2018-10-24 11:59:24,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-24 11:59:24,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:24,319 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:24,319 INFO L424 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:24,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:24,320 INFO L82 PathProgramCache]: Analyzing trace with hash -772586920, now seen corresponding path program 89 times [2018-10-24 11:59:24,320 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:24,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:24,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:24,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:24,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6165 backedges. 4095 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:27,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:27,117 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:27,125 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:59:27,333 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-24 11:59:27,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:27,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6165 backedges. 4095 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:27,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:27,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-24 11:59:27,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-24 11:59:27,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-24 11:59:27,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2257, Invalid=6673, Unknown=0, NotChecked=0, Total=8930 [2018-10-24 11:59:27,446 INFO L87 Difference]: Start difference. First operand 280 states and 281 transitions. Second operand 95 states. [2018-10-24 11:59:31,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:31,209 INFO L93 Difference]: Finished difference Result 471 states and 473 transitions. [2018-10-24 11:59:31,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-24 11:59:31,209 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 279 [2018-10-24 11:59:31,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:31,210 INFO L225 Difference]: With dead ends: 471 [2018-10-24 11:59:31,210 INFO L226 Difference]: Without dead ends: 282 [2018-10-24 11:59:31,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3150 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4607, Invalid=15415, Unknown=0, NotChecked=0, Total=20022 [2018-10-24 11:59:31,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-10-24 11:59:31,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2018-10-24 11:59:31,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2018-10-24 11:59:31,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 283 transitions. [2018-10-24 11:59:31,296 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 283 transitions. Word has length 279 [2018-10-24 11:59:31,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:31,296 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 283 transitions. [2018-10-24 11:59:31,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-24 11:59:31,296 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 283 transitions. [2018-10-24 11:59:31,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2018-10-24 11:59:31,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:31,298 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 45, 45, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:31,298 INFO L424 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:31,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:31,298 INFO L82 PathProgramCache]: Analyzing trace with hash -79313390, now seen corresponding path program 90 times [2018-10-24 11:59:31,298 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:31,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:31,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:31,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:31,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6257 backedges. 2162 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:32,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:32,378 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:32,385 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:59:32,587 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-10-24 11:59:32,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:32,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:32,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6257 backedges. 2162 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:32,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:32,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2018-10-24 11:59:32,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-24 11:59:32,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-24 11:59:32,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2018-10-24 11:59:32,728 INFO L87 Difference]: Start difference. First operand 282 states and 283 transitions. Second operand 52 states. [2018-10-24 11:59:34,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:34,177 INFO L93 Difference]: Finished difference Result 295 states and 296 transitions. [2018-10-24 11:59:34,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-24 11:59:34,177 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 281 [2018-10-24 11:59:34,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:34,179 INFO L225 Difference]: With dead ends: 295 [2018-10-24 11:59:34,179 INFO L226 Difference]: Without dead ends: 293 [2018-10-24 11:59:34,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3679, Invalid=6221, Unknown=0, NotChecked=0, Total=9900 [2018-10-24 11:59:34,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-10-24 11:59:34,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 286. [2018-10-24 11:59:34,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-10-24 11:59:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2018-10-24 11:59:34,268 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 281 [2018-10-24 11:59:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:34,268 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2018-10-24 11:59:34,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-24 11:59:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2018-10-24 11:59:34,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-10-24 11:59:34,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:34,269 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:34,269 INFO L424 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:34,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:34,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1059671589, now seen corresponding path program 91 times [2018-10-24 11:59:34,270 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:34,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:34,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:34,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:34,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:37,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6440 backedges. 4278 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:37,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:37,258 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:37,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:37,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6440 backedges. 4278 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:37,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:37,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-24 11:59:37,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-24 11:59:37,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-24 11:59:37,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2353, Invalid=6959, Unknown=0, NotChecked=0, Total=9312 [2018-10-24 11:59:37,485 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand 97 states. [2018-10-24 11:59:41,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:41,341 INFO L93 Difference]: Finished difference Result 481 states and 483 transitions. [2018-10-24 11:59:41,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-24 11:59:41,341 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 285 [2018-10-24 11:59:41,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:41,342 INFO L225 Difference]: With dead ends: 481 [2018-10-24 11:59:41,342 INFO L226 Difference]: Without dead ends: 288 [2018-10-24 11:59:41,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3289 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4801, Invalid=16079, Unknown=0, NotChecked=0, Total=20880 [2018-10-24 11:59:41,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-10-24 11:59:41,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2018-10-24 11:59:41,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2018-10-24 11:59:41,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 289 transitions. [2018-10-24 11:59:41,431 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 289 transitions. Word has length 285 [2018-10-24 11:59:41,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:41,432 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 289 transitions. [2018-10-24 11:59:41,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-24 11:59:41,432 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 289 transitions. [2018-10-24 11:59:41,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-10-24 11:59:41,433 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:41,433 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 46, 46, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:41,433 INFO L424 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:41,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:41,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1682047509, now seen corresponding path program 92 times [2018-10-24 11:59:41,433 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:41,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:41,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:41,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:41,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6534 backedges. 2256 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:42,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:42,604 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:42,614 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:59:42,736 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:59:42,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:42,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6534 backedges. 2256 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:42,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:42,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-10-24 11:59:42,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-24 11:59:42,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-24 11:59:42,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1476, Unknown=0, NotChecked=0, Total=2756 [2018-10-24 11:59:42,885 INFO L87 Difference]: Start difference. First operand 288 states and 289 transitions. Second operand 53 states. [2018-10-24 11:59:44,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:44,307 INFO L93 Difference]: Finished difference Result 301 states and 302 transitions. [2018-10-24 11:59:44,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-24 11:59:44,307 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 287 [2018-10-24 11:59:44,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:44,308 INFO L225 Difference]: With dead ends: 301 [2018-10-24 11:59:44,308 INFO L226 Difference]: Without dead ends: 299 [2018-10-24 11:59:44,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2447 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3829, Invalid=6473, Unknown=0, NotChecked=0, Total=10302 [2018-10-24 11:59:44,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-10-24 11:59:44,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 292. [2018-10-24 11:59:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-24 11:59:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 293 transitions. [2018-10-24 11:59:44,400 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 293 transitions. Word has length 287 [2018-10-24 11:59:44,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:44,401 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 293 transitions. [2018-10-24 11:59:44,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-24 11:59:44,401 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 293 transitions. [2018-10-24 11:59:44,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-24 11:59:44,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:44,402 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:44,402 INFO L424 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:44,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:44,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1719716770, now seen corresponding path program 93 times [2018-10-24 11:59:44,402 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:44,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:44,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:44,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:44,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6721 backedges. 4465 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:47,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:47,446 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:47,454 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:59:47,663 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-24 11:59:47,664 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:47,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6721 backedges. 4465 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:47,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:47,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-24 11:59:47,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-24 11:59:47,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-24 11:59:47,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2451, Invalid=7251, Unknown=0, NotChecked=0, Total=9702 [2018-10-24 11:59:47,765 INFO L87 Difference]: Start difference. First operand 292 states and 293 transitions. Second operand 99 states. [2018-10-24 11:59:51,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:51,802 INFO L93 Difference]: Finished difference Result 491 states and 493 transitions. [2018-10-24 11:59:51,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-24 11:59:51,802 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 291 [2018-10-24 11:59:51,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:51,803 INFO L225 Difference]: With dead ends: 491 [2018-10-24 11:59:51,803 INFO L226 Difference]: Without dead ends: 294 [2018-10-24 11:59:51,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3431 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4999, Invalid=16757, Unknown=0, NotChecked=0, Total=21756 [2018-10-24 11:59:51,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-10-24 11:59:51,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2018-10-24 11:59:51,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-10-24 11:59:51,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 295 transitions. [2018-10-24 11:59:51,885 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 295 transitions. Word has length 291 [2018-10-24 11:59:51,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:51,885 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 295 transitions. [2018-10-24 11:59:51,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-24 11:59:51,885 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 295 transitions. [2018-10-24 11:59:51,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-10-24 11:59:51,886 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:51,887 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 47, 47, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:51,887 INFO L424 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:51,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:51,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1353191144, now seen corresponding path program 94 times [2018-10-24 11:59:51,887 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:51,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:51,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:51,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:51,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6817 backedges. 2352 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:52,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:52,993 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:53,001 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:59:53,130 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:59:53,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:53,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6817 backedges. 2352 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:53,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:53,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2018-10-24 11:59:53,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-24 11:59:53,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-24 11:59:53,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2018-10-24 11:59:53,277 INFO L87 Difference]: Start difference. First operand 294 states and 295 transitions. Second operand 54 states. [2018-10-24 11:59:54,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:54,723 INFO L93 Difference]: Finished difference Result 307 states and 308 transitions. [2018-10-24 11:59:54,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-24 11:59:54,723 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 293 [2018-10-24 11:59:54,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:54,725 INFO L225 Difference]: With dead ends: 307 [2018-10-24 11:59:54,725 INFO L226 Difference]: Without dead ends: 305 [2018-10-24 11:59:54,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3982, Invalid=6730, Unknown=0, NotChecked=0, Total=10712 [2018-10-24 11:59:54,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2018-10-24 11:59:54,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 298. [2018-10-24 11:59:54,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2018-10-24 11:59:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 299 transitions. [2018-10-24 11:59:54,821 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 299 transitions. Word has length 293 [2018-10-24 11:59:54,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:54,821 INFO L481 AbstractCegarLoop]: Abstraction has 298 states and 299 transitions. [2018-10-24 11:59:54,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-24 11:59:54,821 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 299 transitions. [2018-10-24 11:59:54,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-10-24 11:59:54,822 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:54,822 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:54,822 INFO L424 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:54,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:54,823 INFO L82 PathProgramCache]: Analyzing trace with hash 2049960417, now seen corresponding path program 95 times [2018-10-24 11:59:54,823 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:54,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:54,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:54,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:54,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-24 11:59:56,106 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 11:59:56,109 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 11:59:56,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:59:56 BoogieIcfgContainer [2018-10-24 11:59:56,110 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 11:59:56,110 INFO L168 Benchmark]: Toolchain (without parser) took 232478.35 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.5 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -551.3 MB). Peak memory consumption was 183.3 MB. Max. memory is 7.1 GB. [2018-10-24 11:59:56,111 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 11:59:56,111 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.13 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-24 11:59:56,112 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.95 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 11:59:56,112 INFO L168 Benchmark]: Boogie Preprocessor took 20.27 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. [2018-10-24 11:59:56,112 INFO L168 Benchmark]: RCFGBuilder took 280.99 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 733.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -785.5 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-10-24 11:59:56,113 INFO L168 Benchmark]: TraceAbstraction took 231913.07 ms. Allocated memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 1.6 MB). Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 223.7 MB). Peak memory consumption was 225.2 MB. Max. memory is 7.1 GB. [2018-10-24 11:59:56,115 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 226.13 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 32.95 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 20.27 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. * RCFGBuilder took 280.99 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 733.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -785.5 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 231913.07 ms. Allocated memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 1.6 MB). Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 223.7 MB). Peak memory consumption was 225.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 298 with TraceHistMax 49,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 58 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. TIMEOUT Result, 231.8s OverallTime, 98 OverallIterations, 49 TraceHistogramMax, 116.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4171 SDtfs, 9248 SDslu, 62297 SDs, 0 SdLazy, 65586 SolverSat, 5558 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 40.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21965 GetRequests, 15704 SyntacticMatches, 0 SemanticMatches, 6261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100441 ImplicationChecksByTransitivity, 144.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=298occurred in iteration=97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.5s AutomataMinimizationTime, 97 MinimizatonAttempts, 336 StatesRemovedByMinimization, 48 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.4s SsaConstructionTime, 8.1s SatisfiabilityAnalysisTime, 95.4s InterpolantComputationTime, 28980 NumberOfCodeBlocks, 28980 NumberOfCodeBlocksAsserted, 1350 NumberOfCheckSat, 28789 ConstructedInterpolants, 0 QuantifiedInterpolants, 16861139 SizeOfPredicates, 282 NumberOfNonLiveVariables, 40702 ConjunctsInSsa, 5076 ConjunctsInUnsatCore, 191 InterpolantComputations, 3 PerfectInterpolantSequences, 223534/442366 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown