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-acceleration/nested_false-unreach-call1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:40:52,852 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:40:52,854 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:40:52,871 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:40:52,872 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:40:52,873 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:40:52,875 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:40:52,876 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:40:52,879 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:40:52,880 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:40:52,880 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:40:52,881 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:40:52,882 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:40:52,883 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:40:52,884 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:40:52,885 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:40:52,885 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:40:52,887 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:40:52,889 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:40:52,891 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:40:52,892 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:40:52,893 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:40:52,895 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:40:52,904 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-22 15:40:52,919 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:40:52,919 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:40:52,920 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:40:52,920 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:40:52,921 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:40:52,921 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:40:52,921 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:40:52,921 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:40:52,922 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:40:52,922 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:40:52,922 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:40:52,922 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:40:52,922 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:40:52,923 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:40:52,923 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:40:52,923 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:40:52,923 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:40:52,923 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:40:52,923 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:40:52,924 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:40:52,924 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:40:52,924 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:40:52,924 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:40:52,924 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:40:52,925 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:40:52,925 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:40:52,925 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:40:52,925 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:40:52,969 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:40:52,984 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:40:52,989 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:40:52,990 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:40:52,991 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:40:52,991 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_false-unreach-call1.i [2018-10-22 15:40:53,054 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8da05bb22/f2e4e7b121cc48c3b5a9a1ffd42758f8/FLAGf38588ac1 [2018-10-22 15:40:53,538 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:40:53,539 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_false-unreach-call1.i [2018-10-22 15:40:53,544 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8da05bb22/f2e4e7b121cc48c3b5a9a1ffd42758f8/FLAGf38588ac1 [2018-10-22 15:40:53,557 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8da05bb22/f2e4e7b121cc48c3b5a9a1ffd42758f8 [2018-10-22 15:40:53,566 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:40:53,567 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:40:53,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:40:53,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:40:53,572 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:40:53,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:40:53" (1/1) ... [2018-10-22 15:40:53,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51be25fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:53, skipping insertion in model container [2018-10-22 15:40:53,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:40:53" (1/1) ... [2018-10-22 15:40:53,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:40:53,602 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:40:53,810 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:40:53,814 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:40:53,836 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:40:53,858 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:40:53,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:53 WrapperNode [2018-10-22 15:40:53,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:40:53,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:40:53,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:40:53,861 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:40:53,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:53" (1/1) ... [2018-10-22 15:40:53,879 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:53" (1/1) ... [2018-10-22 15:40:53,902 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:40:53,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:40:53,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:40:53,904 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:40:53,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:53" (1/1) ... [2018-10-22 15:40:53,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:53" (1/1) ... [2018-10-22 15:40:53,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:53" (1/1) ... [2018-10-22 15:40:53,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:53" (1/1) ... [2018-10-22 15:40:53,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:53" (1/1) ... [2018-10-22 15:40:53,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:53" (1/1) ... [2018-10-22 15:40:53,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:53" (1/1) ... [2018-10-22 15:40:53,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:40:53,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:40:53,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:40:53,932 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:40:53,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:40:54,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:40:54,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:40:54,322 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:40:54,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:40:54 BoogieIcfgContainer [2018-10-22 15:40:54,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:40:54,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:40:54,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:40:54,327 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:40:54,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:40:53" (1/3) ... [2018-10-22 15:40:54,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7186e487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:40:54, skipping insertion in model container [2018-10-22 15:40:54,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:53" (2/3) ... [2018-10-22 15:40:54,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7186e487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:40:54, skipping insertion in model container [2018-10-22 15:40:54,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:40:54" (3/3) ... [2018-10-22 15:40:54,331 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_false-unreach-call1.i [2018-10-22 15:40:54,341 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:40:54,348 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:40:54,365 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:40:54,400 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:40:54,400 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:40:54,400 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:40:54,401 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:40:54,401 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:40:54,401 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:40:54,401 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:40:54,401 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:40:54,401 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:40:54,414 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-10-22 15:40:54,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-22 15:40:54,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:54,421 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-22 15:40:54,423 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:54,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:54,430 INFO L82 PathProgramCache]: Analyzing trace with hash 890214759, now seen corresponding path program 1 times [2018-10-22 15:40:54,432 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:54,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:54,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:54,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:54,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:54,543 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:40:54,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:40:54,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:40:54,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:40:54,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:40:54,566 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2018-10-22 15:40:54,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:54,582 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2018-10-22 15:40:54,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:40:54,583 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-22 15:40:54,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:54,592 INFO L225 Difference]: With dead ends: 28 [2018-10-22 15:40:54,592 INFO L226 Difference]: Without dead ends: 11 [2018-10-22 15:40:54,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:40:54,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-22 15:40:54,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-22 15:40:54,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-22 15:40:54,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-22 15:40:54,632 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2018-10-22 15:40:54,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:54,632 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-22 15:40:54,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:40:54,632 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-22 15:40:54,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-22 15:40:54,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:54,633 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:54,634 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:54,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:54,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1805937561, now seen corresponding path program 1 times [2018-10-22 15:40:54,634 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:54,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:54,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:54,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:54,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:54,826 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:40:54,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:40:54,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:40:54,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:40:54,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:40:54,829 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 3 states. [2018-10-22 15:40:54,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:54,866 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-22 15:40:54,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:40:54,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-22 15:40:54,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:54,868 INFO L225 Difference]: With dead ends: 20 [2018-10-22 15:40:54,868 INFO L226 Difference]: Without dead ends: 16 [2018-10-22 15:40:54,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:40:54,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-22 15:40:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2018-10-22 15:40:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-22 15:40:54,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-22 15:40:54,883 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 7 [2018-10-22 15:40:54,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:54,884 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-22 15:40:54,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:40:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-22 15:40:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-22 15:40:54,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:54,885 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:54,886 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:54,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:54,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1845410961, now seen corresponding path program 1 times [2018-10-22 15:40:54,887 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:54,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:54,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:54,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:54,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:54,962 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:40:54,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:40:54,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:40:54,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:40:54,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:40:54,964 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2018-10-22 15:40:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:54,990 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2018-10-22 15:40:54,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:40:54,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-10-22 15:40:54,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:54,991 INFO L225 Difference]: With dead ends: 24 [2018-10-22 15:40:54,992 INFO L226 Difference]: Without dead ends: 15 [2018-10-22 15:40:54,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:40:54,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-22 15:40:54,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-22 15:40:54,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-22 15:40:54,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-22 15:40:54,997 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-10-22 15:40:54,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:54,998 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-22 15:40:54,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:40:54,998 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-22 15:40:54,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-22 15:40:54,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:54,999 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:55,000 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:55,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:55,000 INFO L82 PathProgramCache]: Analyzing trace with hash 788746549, now seen corresponding path program 1 times [2018-10-22 15:40:55,000 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:55,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:55,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:55,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:55,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:55,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:55,090 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:55,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:55,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:55,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:55,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:55,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2018-10-22 15:40:55,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:40:55,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:40:55,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:40:55,255 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2018-10-22 15:40:55,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:55,710 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2018-10-22 15:40:55,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:40:55,711 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2018-10-22 15:40:55,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:55,712 INFO L225 Difference]: With dead ends: 44 [2018-10-22 15:40:55,712 INFO L226 Difference]: Without dead ends: 33 [2018-10-22 15:40:55,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:40:55,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-22 15:40:55,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2018-10-22 15:40:55,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-22 15:40:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-10-22 15:40:55,719 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2018-10-22 15:40:55,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:55,720 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-10-22 15:40:55,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:40:55,720 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-10-22 15:40:55,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-22 15:40:55,721 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:55,721 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:55,721 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:55,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:55,722 INFO L82 PathProgramCache]: Analyzing trace with hash -812226087, now seen corresponding path program 2 times [2018-10-22 15:40:55,722 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:55,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:55,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:55,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:55,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-22 15:40:55,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:55,838 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:55,852 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:40:55,869 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:40:55,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:55,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-22 15:40:56,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:56,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-10-22 15:40:56,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:40:56,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:40:56,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:40:56,009 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2018-10-22 15:40:56,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:56,697 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2018-10-22 15:40:56,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:40:56,698 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2018-10-22 15:40:56,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:56,699 INFO L225 Difference]: With dead ends: 66 [2018-10-22 15:40:56,699 INFO L226 Difference]: Without dead ends: 50 [2018-10-22 15:40:56,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:40:56,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-22 15:40:56,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2018-10-22 15:40:56,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-22 15:40:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-10-22 15:40:56,709 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 25 [2018-10-22 15:40:56,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:56,709 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-10-22 15:40:56,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:40:56,710 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-10-22 15:40:56,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-22 15:40:56,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:56,711 INFO L375 BasicCegarLoop]: trace histogram [12, 9, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:56,712 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:56,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:56,712 INFO L82 PathProgramCache]: Analyzing trace with hash -264218303, now seen corresponding path program 3 times [2018-10-22 15:40:56,712 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:56,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:56,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:56,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:56,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-10-22 15:40:56,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:56,825 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:56,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:40:56,864 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-22 15:40:56,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:56,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:56,906 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 72 proven. 12 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-10-22 15:40:56,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:56,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-22 15:40:56,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:40:56,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:40:56,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:40:56,931 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 6 states. [2018-10-22 15:40:57,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:57,023 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2018-10-22 15:40:57,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:40:57,025 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2018-10-22 15:40:57,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:57,026 INFO L225 Difference]: With dead ends: 76 [2018-10-22 15:40:57,026 INFO L226 Difference]: Without dead ends: 47 [2018-10-22 15:40:57,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:40:57,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-22 15:40:57,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-22 15:40:57,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-22 15:40:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2018-10-22 15:40:57,035 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2018-10-22 15:40:57,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:57,036 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2018-10-22 15:40:57,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:40:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2018-10-22 15:40:57,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-22 15:40:57,037 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:57,037 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:57,038 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:57,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:57,038 INFO L82 PathProgramCache]: Analyzing trace with hash -247085369, now seen corresponding path program 4 times [2018-10-22 15:40:57,038 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:57,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:57,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:57,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:57,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-22 15:40:57,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:57,295 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:57,312 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:40:57,339 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:40:57,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:57,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-22 15:40:57,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:57,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 10 [2018-10-22 15:40:57,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:40:57,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:40:57,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:40:57,574 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 10 states. [2018-10-22 15:40:57,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:57,785 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2018-10-22 15:40:57,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:40:57,785 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2018-10-22 15:40:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:57,787 INFO L225 Difference]: With dead ends: 75 [2018-10-22 15:40:57,787 INFO L226 Difference]: Without dead ends: 71 [2018-10-22 15:40:57,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:40:57,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-22 15:40:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2018-10-22 15:40:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-22 15:40:57,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2018-10-22 15:40:57,798 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 46 [2018-10-22 15:40:57,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:57,798 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2018-10-22 15:40:57,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:40:57,798 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2018-10-22 15:40:57,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-22 15:40:57,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:57,800 INFO L375 BasicCegarLoop]: trace histogram [20, 16, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:57,801 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:57,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:57,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1693294873, now seen corresponding path program 5 times [2018-10-22 15:40:57,801 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:57,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:57,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:57,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:57,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-10-22 15:40:58,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:58,030 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:58,038 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:40:58,059 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 15:40:58,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:58,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 265 proven. 20 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-10-22 15:40:58,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:58,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-10-22 15:40:58,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:40:58,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:40:58,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:40:58,194 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 12 states. [2018-10-22 15:40:59,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:59,198 INFO L93 Difference]: Finished difference Result 142 states and 158 transitions. [2018-10-22 15:40:59,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-22 15:40:59,200 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2018-10-22 15:40:59,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:59,201 INFO L225 Difference]: With dead ends: 142 [2018-10-22 15:40:59,201 INFO L226 Difference]: Without dead ends: 96 [2018-10-22 15:40:59,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:40:59,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-22 15:40:59,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2018-10-22 15:40:59,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-22 15:40:59,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2018-10-22 15:40:59,216 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 59 [2018-10-22 15:40:59,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:59,217 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2018-10-22 15:40:59,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:40:59,217 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2018-10-22 15:40:59,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-22 15:40:59,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:59,220 INFO L375 BasicCegarLoop]: trace histogram [30, 25, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:59,220 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:59,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:59,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1557677645, now seen corresponding path program 6 times [2018-10-22 15:40:59,221 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:59,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:59,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:59,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:59,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 0 proven. 760 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-10-22 15:40:59,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:59,405 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:59,413 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:40:59,584 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-22 15:40:59,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:59,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 524 proven. 30 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2018-10-22 15:40:59,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:59,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-10-22 15:40:59,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:40:59,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:40:59,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:40:59,761 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand 14 states. [2018-10-22 15:41:00,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:00,981 INFO L93 Difference]: Finished difference Result 192 states and 211 transitions. [2018-10-22 15:41:00,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-22 15:41:00,982 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2018-10-22 15:41:00,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:00,984 INFO L225 Difference]: With dead ends: 192 [2018-10-22 15:41:00,984 INFO L226 Difference]: Without dead ends: 125 [2018-10-22 15:41:00,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=2281, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:41:00,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-22 15:41:01,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2018-10-22 15:41:01,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-22 15:41:01,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2018-10-22 15:41:01,001 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 82 [2018-10-22 15:41:01,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:01,001 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2018-10-22 15:41:01,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:41:01,002 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2018-10-22 15:41:01,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-22 15:41:01,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:01,004 INFO L375 BasicCegarLoop]: trace histogram [42, 36, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:01,004 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:01,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:01,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1206872743, now seen corresponding path program 7 times [2018-10-22 15:41:01,005 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:01,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:01,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:01,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:01,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-10-22 15:41:01,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:01,357 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:01,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:01,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1779 backedges. 0 proven. 1569 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-10-22 15:41:01,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:01,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 15 [2018-10-22 15:41:01,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:41:01,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:41:01,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:41:01,863 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand 15 states. [2018-10-22 15:41:02,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:02,406 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2018-10-22 15:41:02,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:41:02,406 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 109 [2018-10-22 15:41:02,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:02,408 INFO L225 Difference]: With dead ends: 146 [2018-10-22 15:41:02,408 INFO L226 Difference]: Without dead ends: 142 [2018-10-22 15:41:02,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:41:02,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-10-22 15:41:02,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 127. [2018-10-22 15:41:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-22 15:41:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 134 transitions. [2018-10-22 15:41:02,439 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 134 transitions. Word has length 109 [2018-10-22 15:41:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:02,439 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 134 transitions. [2018-10-22 15:41:02,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:41:02,439 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 134 transitions. [2018-10-22 15:41:02,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-22 15:41:02,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:02,442 INFO L375 BasicCegarLoop]: trace histogram [49, 42, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:02,442 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:02,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:02,442 INFO L82 PathProgramCache]: Analyzing trace with hash 505963987, now seen corresponding path program 8 times [2018-10-22 15:41:02,442 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:02,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:02,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:02,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:02,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:02,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2429 backedges. 0 proven. 2135 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-10-22 15:41:02,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:02,751 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:02,758 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:41:02,808 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:41:02,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:02,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2429 backedges. 0 proven. 2135 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-10-22 15:41:02,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:02,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-22 15:41:02,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:41:02,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:41:02,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:41:02,949 INFO L87 Difference]: Start difference. First operand 127 states and 134 transitions. Second operand 10 states. [2018-10-22 15:41:03,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:03,431 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2018-10-22 15:41:03,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:41:03,431 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 126 [2018-10-22 15:41:03,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:03,434 INFO L225 Difference]: With dead ends: 163 [2018-10-22 15:41:03,434 INFO L226 Difference]: Without dead ends: 159 [2018-10-22 15:41:03,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:41:03,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-22 15:41:03,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 144. [2018-10-22 15:41:03,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-10-22 15:41:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2018-10-22 15:41:03,451 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 126 [2018-10-22 15:41:03,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:03,451 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2018-10-22 15:41:03,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:41:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2018-10-22 15:41:03,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-22 15:41:03,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:03,454 INFO L375 BasicCegarLoop]: trace histogram [56, 48, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:03,454 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:03,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:03,454 INFO L82 PathProgramCache]: Analyzing trace with hash -30386023, now seen corresponding path program 9 times [2018-10-22 15:41:03,454 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:03,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:03,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:03,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:03,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3180 backedges. 0 proven. 2844 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-10-22 15:41:03,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:03,988 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:03,996 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:41:04,031 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-22 15:41:04,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:04,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3180 backedges. 709 proven. 42 refuted. 0 times theorem prover too weak. 2429 trivial. 0 not checked. [2018-10-22 15:41:04,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:04,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2018-10-22 15:41:04,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:41:04,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:41:04,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:41:04,202 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand 18 states. [2018-10-22 15:41:06,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:06,851 INFO L93 Difference]: Finished difference Result 322 states and 350 transitions. [2018-10-22 15:41:06,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-22 15:41:06,851 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 143 [2018-10-22 15:41:06,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:06,853 INFO L225 Difference]: With dead ends: 322 [2018-10-22 15:41:06,853 INFO L226 Difference]: Without dead ends: 196 [2018-10-22 15:41:06,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=285, Invalid=6195, Unknown=0, NotChecked=0, Total=6480 [2018-10-22 15:41:06,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-22 15:41:06,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 179. [2018-10-22 15:41:06,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-22 15:41:06,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 188 transitions. [2018-10-22 15:41:06,874 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 188 transitions. Word has length 143 [2018-10-22 15:41:06,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:06,874 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 188 transitions. [2018-10-22 15:41:06,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:41:06,874 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 188 transitions. [2018-10-22 15:41:06,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-22 15:41:06,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:06,876 INFO L375 BasicCegarLoop]: trace histogram [72, 63, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:06,877 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:06,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:06,877 INFO L82 PathProgramCache]: Analyzing trace with hash -946975655, now seen corresponding path program 10 times [2018-10-22 15:41:06,877 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:06,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:06,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:06,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:06,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5238 backedges. 0 proven. 4734 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2018-10-22 15:41:07,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:07,747 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:07,760 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:41:07,834 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:41:07,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:07,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5238 backedges. 2620 proven. 56 refuted. 0 times theorem prover too weak. 2562 trivial. 0 not checked. [2018-10-22 15:41:08,045 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:08,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2018-10-22 15:41:08,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:41:08,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:41:08,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:41:08,047 INFO L87 Difference]: Start difference. First operand 179 states and 188 transitions. Second operand 20 states. [2018-10-22 15:41:10,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:10,850 INFO L93 Difference]: Finished difference Result 396 states and 427 transitions. [2018-10-22 15:41:10,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-22 15:41:10,850 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 178 [2018-10-22 15:41:10,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:10,853 INFO L225 Difference]: With dead ends: 396 [2018-10-22 15:41:10,853 INFO L226 Difference]: Without dead ends: 237 [2018-10-22 15:41:10,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=357, Invalid=9543, Unknown=0, NotChecked=0, Total=9900 [2018-10-22 15:41:10,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-10-22 15:41:10,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 218. [2018-10-22 15:41:10,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-10-22 15:41:10,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 228 transitions. [2018-10-22 15:41:10,885 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 228 transitions. Word has length 178 [2018-10-22 15:41:10,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:10,885 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 228 transitions. [2018-10-22 15:41:10,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:41:10,886 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 228 transitions. [2018-10-22 15:41:10,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-22 15:41:10,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:10,888 INFO L375 BasicCegarLoop]: trace histogram [90, 80, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:10,889 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:10,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:10,889 INFO L82 PathProgramCache]: Analyzing trace with hash -849417639, now seen corresponding path program 11 times [2018-10-22 15:41:10,889 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:10,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:10,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:10,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:10,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8165 backedges. 0 proven. 7445 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2018-10-22 15:41:11,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:11,241 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:11,248 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:41:11,305 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-22 15:41:11,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:11,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8165 backedges. 3790 proven. 72 refuted. 0 times theorem prover too weak. 4303 trivial. 0 not checked. [2018-10-22 15:41:11,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:11,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2018-10-22 15:41:11,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:41:11,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:41:11,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:41:11,517 INFO L87 Difference]: Start difference. First operand 218 states and 228 transitions. Second operand 22 states. [2018-10-22 15:41:15,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:15,934 INFO L93 Difference]: Finished difference Result 478 states and 512 transitions. [2018-10-22 15:41:15,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-22 15:41:15,935 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 217 [2018-10-22 15:41:15,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:15,936 INFO L225 Difference]: With dead ends: 478 [2018-10-22 15:41:15,936 INFO L226 Difference]: Without dead ends: 282 [2018-10-22 15:41:15,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 209 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=437, Invalid=14083, Unknown=0, NotChecked=0, Total=14520 [2018-10-22 15:41:15,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-10-22 15:41:15,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 261. [2018-10-22 15:41:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-10-22 15:41:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 272 transitions. [2018-10-22 15:41:15,959 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 272 transitions. Word has length 217 [2018-10-22 15:41:15,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:15,959 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 272 transitions. [2018-10-22 15:41:15,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:41:15,959 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 272 transitions. [2018-10-22 15:41:15,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-10-22 15:41:15,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:15,963 INFO L375 BasicCegarLoop]: trace histogram [110, 99, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:15,963 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:15,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:15,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2120796955, now seen corresponding path program 12 times [2018-10-22 15:41:15,963 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:15,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:15,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:15,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:15,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12177 backedges. 0 proven. 11187 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-22 15:41:16,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:16,370 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:16,378 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:41:21,519 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-22 15:41:21,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:21,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12177 backedges. 5272 proven. 90 refuted. 0 times theorem prover too weak. 6815 trivial. 0 not checked. [2018-10-22 15:41:21,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:21,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2018-10-22 15:41:21,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 15:41:21,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 15:41:21,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:41:21,805 INFO L87 Difference]: Start difference. First operand 261 states and 272 transitions. Second operand 24 states. [2018-10-22 15:41:26,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:26,181 INFO L93 Difference]: Finished difference Result 568 states and 605 transitions. [2018-10-22 15:41:26,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-22 15:41:26,182 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 260 [2018-10-22 15:41:26,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:26,183 INFO L225 Difference]: With dead ends: 568 [2018-10-22 15:41:26,183 INFO L226 Difference]: Without dead ends: 331 [2018-10-22 15:41:26,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7140 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=525, Invalid=20067, Unknown=0, NotChecked=0, Total=20592 [2018-10-22 15:41:26,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-10-22 15:41:26,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 308. [2018-10-22 15:41:26,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2018-10-22 15:41:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 320 transitions. [2018-10-22 15:41:26,209 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 320 transitions. Word has length 260 [2018-10-22 15:41:26,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:26,209 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 320 transitions. [2018-10-22 15:41:26,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 15:41:26,209 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 320 transitions. [2018-10-22 15:41:26,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-10-22 15:41:26,213 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:26,213 INFO L375 BasicCegarLoop]: trace histogram [132, 120, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:26,213 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:26,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:26,214 INFO L82 PathProgramCache]: Analyzing trace with hash 984714521, now seen corresponding path program 13 times [2018-10-22 15:41:26,214 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:26,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:26,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:26,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:26,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17514 backedges. 0 proven. 16194 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-10-22 15:41:26,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:26,822 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:26,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:26,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17514 backedges. 0 proven. 16194 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-10-22 15:41:27,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:27,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-22 15:41:27,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:41:27,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:41:27,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:41:27,110 INFO L87 Difference]: Start difference. First operand 308 states and 320 transitions. Second operand 15 states. [2018-10-22 15:41:27,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:27,445 INFO L93 Difference]: Finished difference Result 360 states and 374 transitions. [2018-10-22 15:41:27,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:41:27,445 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 307 [2018-10-22 15:41:27,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:27,447 INFO L225 Difference]: With dead ends: 360 [2018-10-22 15:41:27,448 INFO L226 Difference]: Without dead ends: 356 [2018-10-22 15:41:27,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 307 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:41:27,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2018-10-22 15:41:27,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 333. [2018-10-22 15:41:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2018-10-22 15:41:27,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 346 transitions. [2018-10-22 15:41:27,473 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 346 transitions. Word has length 307 [2018-10-22 15:41:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:27,474 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 346 transitions. [2018-10-22 15:41:27,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:41:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 346 transitions. [2018-10-22 15:41:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-10-22 15:41:27,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:27,476 INFO L375 BasicCegarLoop]: trace histogram [143, 130, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:27,476 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:27,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:27,476 INFO L82 PathProgramCache]: Analyzing trace with hash -895836117, now seen corresponding path program 14 times [2018-10-22 15:41:27,476 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:27,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:27,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:27,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:27,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20566 backedges. 0 proven. 19136 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-10-22 15:41:28,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:28,248 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:28,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:41:28,379 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:41:28,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:28,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 20566 backedges. 0 proven. 19136 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-10-22 15:41:28,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:28,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-22 15:41:28,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:41:28,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:41:28,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:41:28,597 INFO L87 Difference]: Start difference. First operand 333 states and 346 transitions. Second operand 16 states. [2018-10-22 15:41:29,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:29,077 INFO L93 Difference]: Finished difference Result 385 states and 400 transitions. [2018-10-22 15:41:29,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:41:29,078 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 332 [2018-10-22 15:41:29,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:29,080 INFO L225 Difference]: With dead ends: 385 [2018-10-22 15:41:29,080 INFO L226 Difference]: Without dead ends: 381 [2018-10-22 15:41:29,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 332 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:41:29,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2018-10-22 15:41:29,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 358. [2018-10-22 15:41:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2018-10-22 15:41:29,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 372 transitions. [2018-10-22 15:41:29,121 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 372 transitions. Word has length 332 [2018-10-22 15:41:29,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:29,122 INFO L481 AbstractCegarLoop]: Abstraction has 358 states and 372 transitions. [2018-10-22 15:41:29,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:41:29,122 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 372 transitions. [2018-10-22 15:41:29,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2018-10-22 15:41:29,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:29,125 INFO L375 BasicCegarLoop]: trace histogram [154, 140, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:29,125 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:29,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:29,126 INFO L82 PathProgramCache]: Analyzing trace with hash 88393049, now seen corresponding path program 15 times [2018-10-22 15:41:29,126 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:29,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:29,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:29,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:29,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 23863 backedges. 0 proven. 22323 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-10-22 15:41:30,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:30,676 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:30,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown