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/diamond_true-unreach-call1_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 15:48:10,944 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 15:48:10,947 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 15:48:10,961 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 15:48:10,962 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 15:48:10,964 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 15:48:10,965 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 15:48:10,967 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 15:48:10,970 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 15:48:10,974 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 15:48:10,975 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 15:48:10,975 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 15:48:10,976 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 15:48:10,979 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 15:48:10,981 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 15:48:10,982 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 15:48:10,983 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 15:48:10,985 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 15:48:10,987 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 15:48:10,988 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 15:48:10,990 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 15:48:10,991 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 15:48:10,993 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 15:48:11,002 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 [2018-10-23 15:48:11,021 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 15:48:11,022 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 15:48:11,023 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 15:48:11,024 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 15:48:11,025 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 15:48:11,025 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 15:48:11,025 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 15:48:11,025 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 15:48:11,025 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 15:48:11,026 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 15:48:11,026 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 15:48:11,026 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 15:48:11,026 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 15:48:11,026 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 15:48:11,027 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 15:48:11,028 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 15:48:11,028 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 15:48:11,028 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 15:48:11,029 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 15:48:11,030 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 15:48:11,030 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 15:48:11,030 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 15:48:11,031 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 15:48:11,031 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 15:48:11,031 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 15:48:11,031 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 15:48:11,031 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 15:48:11,031 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 15:48:11,106 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 15:48:11,126 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 15:48:11,130 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 15:48:11,132 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 15:48:11,132 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 15:48:11,133 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_true-unreach-call1_true-termination.i [2018-10-23 15:48:11,198 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/414fab632/ee6313c06c1341ecb4909dc985d5b080/FLAGd173bf490 [2018-10-23 15:48:11,625 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 15:48:11,626 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_true-unreach-call1_true-termination.i [2018-10-23 15:48:11,631 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/414fab632/ee6313c06c1341ecb4909dc985d5b080/FLAGd173bf490 [2018-10-23 15:48:11,649 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/414fab632/ee6313c06c1341ecb4909dc985d5b080 [2018-10-23 15:48:11,660 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 15:48:11,661 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 15:48:11,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 15:48:11,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 15:48:11,667 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 15:48:11,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 03:48:11" (1/1) ... [2018-10-23 15:48:11,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29d2dc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:48:11, skipping insertion in model container [2018-10-23 15:48:11,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 03:48:11" (1/1) ... [2018-10-23 15:48:11,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 15:48:11,703 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 15:48:11,899 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 15:48:11,905 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 15:48:11,929 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 15:48:11,948 INFO L193 MainTranslator]: Completed translation [2018-10-23 15:48:11,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:48:11 WrapperNode [2018-10-23 15:48:11,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 15:48:11,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 15:48:11,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 15:48:11,951 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 15:48:11,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:48:11" (1/1) ... [2018-10-23 15:48:11,970 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:48:11" (1/1) ... [2018-10-23 15:48:11,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 15:48:11,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 15:48:11,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 15:48:11,996 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 15:48:12,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:48:11" (1/1) ... [2018-10-23 15:48:12,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:48:11" (1/1) ... [2018-10-23 15:48:12,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:48:11" (1/1) ... [2018-10-23 15:48:12,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:48:11" (1/1) ... [2018-10-23 15:48:12,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:48:11" (1/1) ... [2018-10-23 15:48:12,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:48:11" (1/1) ... [2018-10-23 15:48:12,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:48:11" (1/1) ... [2018-10-23 15:48:12,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 15:48:12,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 15:48:12,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 15:48:12,023 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 15:48:12,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:48:11" (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 [2018-10-23 15:48:12,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 15:48:12,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 15:48:12,354 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 15:48:12,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 03:48:12 BoogieIcfgContainer [2018-10-23 15:48:12,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 15:48:12,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 15:48:12,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 15:48:12,360 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 15:48:12,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 03:48:11" (1/3) ... [2018-10-23 15:48:12,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b68f45e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 03:48:12, skipping insertion in model container [2018-10-23 15:48:12,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:48:11" (2/3) ... [2018-10-23 15:48:12,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b68f45e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 03:48:12, skipping insertion in model container [2018-10-23 15:48:12,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 03:48:12" (3/3) ... [2018-10-23 15:48:12,363 INFO L112 eAbstractionObserver]: Analyzing ICFG diamond_true-unreach-call1_true-termination.i [2018-10-23 15:48:12,372 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 15:48:12,379 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 15:48:12,397 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 15:48:12,438 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 15:48:12,438 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 15:48:12,438 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 15:48:12,439 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 15:48:12,439 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 15:48:12,439 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 15:48:12,439 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 15:48:12,439 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 15:48:12,439 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 15:48:12,453 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-10-23 15:48:12,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-23 15:48:12,459 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:12,460 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-23 15:48:12,463 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:12,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:12,470 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2018-10-23 15:48:12,472 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:12,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:12,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:12,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:48:12,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:12,584 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 15:48:12,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 15:48:12,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-23 15:48:12,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-23 15:48:12,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 15:48:12,610 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-10-23 15:48:12,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:12,627 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-23 15:48:12,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-23 15:48:12,629 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-23 15:48:12,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:12,641 INFO L225 Difference]: With dead ends: 21 [2018-10-23 15:48:12,641 INFO L226 Difference]: Without dead ends: 9 [2018-10-23 15:48:12,645 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 [2018-10-23 15:48:12,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-23 15:48:12,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-23 15:48:12,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-23 15:48:12,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-23 15:48:12,675 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-23 15:48:12,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:12,676 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-23 15:48:12,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-23 15:48:12,676 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-23 15:48:12,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-23 15:48:12,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:12,677 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:12,677 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:12,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:12,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1805929617, now seen corresponding path program 1 times [2018-10-23 15:48:12,677 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:12,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:12,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:12,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:48:12,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:12,850 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 15:48:12,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 15:48:12,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 15:48:12,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 15:48:12,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 15:48:12,854 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-10-23 15:48:12,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:12,976 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2018-10-23 15:48:12,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 15:48:12,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-23 15:48:12,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:12,984 INFO L225 Difference]: With dead ends: 16 [2018-10-23 15:48:12,984 INFO L226 Difference]: Without dead ends: 12 [2018-10-23 15:48:12,985 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 [2018-10-23 15:48:12,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-23 15:48:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-10-23 15:48:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-23 15:48:12,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-23 15:48:12,994 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2018-10-23 15:48:12,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:12,995 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-23 15:48:12,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 15:48:12,995 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-23 15:48:12,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-23 15:48:12,997 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:12,997 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:12,998 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:12,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:12,999 INFO L82 PathProgramCache]: Analyzing trace with hash -992266740, now seen corresponding path program 1 times [2018-10-23 15:48:12,999 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:12,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:13,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:13,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:48:13,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:13,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:13,132 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 [2018-10-23 15:48:13,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:48:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:13,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:48:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:13,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:48:13,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-23 15:48:13,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 15:48:13,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 15:48:13,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-23 15:48:13,272 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2018-10-23 15:48:13,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:13,422 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2018-10-23 15:48:13,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 15:48:13,423 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-23 15:48:13,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:13,423 INFO L225 Difference]: With dead ends: 19 [2018-10-23 15:48:13,424 INFO L226 Difference]: Without dead ends: 15 [2018-10-23 15:48:13,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-23 15:48:13,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-23 15:48:13,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-10-23 15:48:13,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-23 15:48:13,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-23 15:48:13,428 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2018-10-23 15:48:13,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:13,428 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-23 15:48:13,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 15:48:13,429 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-23 15:48:13,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-23 15:48:13,429 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:13,429 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:13,430 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:13,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:13,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1049525042, now seen corresponding path program 1 times [2018-10-23 15:48:13,430 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:13,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:13,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:13,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:48:13,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:13,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:13,584 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-23 15:48:13,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:48:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:13,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:48:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:13,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:48:13,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-23 15:48:13,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 15:48:13,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 15:48:13,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-23 15:48:13,687 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2018-10-23 15:48:13,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:13,802 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-23 15:48:13,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 15:48:13,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-23 15:48:13,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:13,804 INFO L225 Difference]: With dead ends: 21 [2018-10-23 15:48:13,804 INFO L226 Difference]: Without dead ends: 17 [2018-10-23 15:48:13,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-23 15:48:13,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-23 15:48:13,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-23 15:48:13,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-23 15:48:13,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-23 15:48:13,809 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2018-10-23 15:48:13,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:13,809 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-23 15:48:13,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 15:48:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-23 15:48:13,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-23 15:48:13,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:13,810 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:13,811 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:13,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:13,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1039690063, now seen corresponding path program 2 times [2018-10-23 15:48:13,811 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:13,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:13,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:13,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:48:13,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:14,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:14,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:14,085 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 [2018-10-23 15:48:14,094 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 15:48:14,110 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 15:48:14,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:48:14,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:48:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:14,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:48:14,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-23 15:48:14,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 15:48:14,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 15:48:14,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-23 15:48:14,198 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2018-10-23 15:48:14,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:14,273 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2018-10-23 15:48:14,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 15:48:14,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-23 15:48:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:14,276 INFO L225 Difference]: With dead ends: 24 [2018-10-23 15:48:14,276 INFO L226 Difference]: Without dead ends: 20 [2018-10-23 15:48:14,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-23 15:48:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-23 15:48:14,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2018-10-23 15:48:14,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-23 15:48:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2018-10-23 15:48:14,281 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2018-10-23 15:48:14,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:14,282 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2018-10-23 15:48:14,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 15:48:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2018-10-23 15:48:14,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-23 15:48:14,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:14,283 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:14,283 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:14,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:14,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1096948365, now seen corresponding path program 1 times [2018-10-23 15:48:14,284 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:14,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:14,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:14,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:48:14,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:14,521 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 13 [2018-10-23 15:48:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:14,522 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 15:48:14,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 15:48:14,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 15:48:14,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 15:48:14,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 15:48:14,527 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2018-10-23 15:48:14,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:14,610 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-10-23 15:48:14,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 15:48:14,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-10-23 15:48:14,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:14,611 INFO L225 Difference]: With dead ends: 33 [2018-10-23 15:48:14,611 INFO L226 Difference]: Without dead ends: 26 [2018-10-23 15:48:14,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 15:48:14,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-23 15:48:14,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2018-10-23 15:48:14,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-23 15:48:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2018-10-23 15:48:14,618 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 13 [2018-10-23 15:48:14,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:14,618 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2018-10-23 15:48:14,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 15:48:14,619 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2018-10-23 15:48:14,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-23 15:48:14,619 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:14,619 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:14,620 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:14,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:14,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1719748433, now seen corresponding path program 2 times [2018-10-23 15:48:14,620 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:14,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:14,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:14,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:48:14,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:14,713 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 15:48:14,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 15:48:14,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 15:48:14,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 15:48:14,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 15:48:14,715 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 3 states. [2018-10-23 15:48:14,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:14,751 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-10-23 15:48:14,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 15:48:14,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-10-23 15:48:14,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:14,754 INFO L225 Difference]: With dead ends: 33 [2018-10-23 15:48:14,754 INFO L226 Difference]: Without dead ends: 26 [2018-10-23 15:48:14,754 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 [2018-10-23 15:48:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-23 15:48:14,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2018-10-23 15:48:14,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-23 15:48:14,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-23 15:48:14,760 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2018-10-23 15:48:14,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:14,761 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-23 15:48:14,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 15:48:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-23 15:48:14,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-23 15:48:14,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:14,762 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:14,762 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:14,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:14,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1777006735, now seen corresponding path program 2 times [2018-10-23 15:48:14,763 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:14,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:14,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:14,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:48:14,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:15,021 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:15,022 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 [2018-10-23 15:48:15,037 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 15:48:15,049 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 15:48:15,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:48:15,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:48:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:15,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:48:15,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-23 15:48:15,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 15:48:15,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 15:48:15,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-23 15:48:15,093 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2018-10-23 15:48:15,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:15,199 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-10-23 15:48:15,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 15:48:15,199 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-23 15:48:15,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:15,200 INFO L225 Difference]: With dead ends: 30 [2018-10-23 15:48:15,200 INFO L226 Difference]: Without dead ends: 26 [2018-10-23 15:48:15,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-23 15:48:15,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-23 15:48:15,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-23 15:48:15,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-23 15:48:15,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-23 15:48:15,207 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2018-10-23 15:48:15,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:15,209 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-23 15:48:15,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 15:48:15,209 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-23 15:48:15,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-23 15:48:15,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:15,210 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:15,210 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:15,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:15,211 INFO L82 PathProgramCache]: Analyzing trace with hash -783665172, now seen corresponding path program 3 times [2018-10-23 15:48:15,211 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:15,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:15,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:15,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:48:15,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:15,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:15,482 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 [2018-10-23 15:48:15,492 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 15:48:27,766 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-23 15:48:27,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:48:27,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:48:32,517 WARN L832 $PredicateComparison]: unable to prove that (or (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond) (and (exists ((v_prenex_4 Int) (v_prenex_3 Int)) (let ((.cse0 (mod v_prenex_3 2)) (.cse1 (mod v_prenex_4 2))) (and (= 0 .cse0) (<= 99 (mod v_prenex_3 4294967296)) (< (mod (+ v_prenex_3 4294967295) 4294967296) 99) (not (= .cse0 .cse1)) (<= 0 (mod v_prenex_4 4294967296)) (not (= 0 .cse1)) (not (= (mod (+ .cse0 4294967294) 4294967296) .cse1)) (not (= .cse0 (mod (+ .cse1 4294967294) 4294967296)))))) (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond))) is different from false [2018-10-23 15:48:32,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-23 15:48:32,578 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 15:48:32,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2018-10-23 15:48:32,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 15:48:32,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 15:48:32,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=53, Unknown=1, NotChecked=14, Total=90 [2018-10-23 15:48:32,580 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-10-23 15:48:34,866 WARN L832 $PredicateComparison]: unable to prove that (and (< (mod (+ c_ULTIMATE.start_main_~x~0 4294967295) 4294967296) 99) (not (= 0 (mod c_ULTIMATE.start_main_~y~0 2))) (<= 99 (mod c_ULTIMATE.start_main_~x~0 4294967296)) (or (= 1 c_ULTIMATE.start___VERIFIER_assert_~cond) (and (exists ((v_prenex_4 Int) (v_prenex_3 Int)) (let ((.cse0 (mod v_prenex_3 2)) (.cse1 (mod v_prenex_4 2))) (and (= 0 .cse0) (<= 99 (mod v_prenex_3 4294967296)) (< (mod (+ v_prenex_3 4294967295) 4294967296) 99) (not (= .cse0 .cse1)) (<= 0 (mod v_prenex_4 4294967296)) (not (= 0 .cse1)) (not (= (mod (+ .cse0 4294967294) 4294967296) .cse1)) (not (= .cse0 (mod (+ .cse1 4294967294) 4294967296)))))) (= 0 c_ULTIMATE.start___VERIFIER_assert_~cond)))) is different from false [2018-10-23 15:48:34,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:34,869 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2018-10-23 15:48:34,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-23 15:48:34,869 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2018-10-23 15:48:34,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:34,870 INFO L225 Difference]: With dead ends: 37 [2018-10-23 15:48:34,870 INFO L226 Difference]: Without dead ends: 17 [2018-10-23 15:48:34,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=46, Invalid=116, Unknown=2, NotChecked=46, Total=210 [2018-10-23 15:48:34,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-23 15:48:34,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-23 15:48:34,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-23 15:48:34,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-23 15:48:34,874 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 16 [2018-10-23 15:48:34,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:34,875 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-23 15:48:34,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 15:48:34,875 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-23 15:48:34,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-23 15:48:34,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:34,876 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:34,876 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:34,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:34,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1779147282, now seen corresponding path program 3 times [2018-10-23 15:48:34,877 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:34,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:34,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:34,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:48:34,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:35,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:35,032 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 [2018-10-23 15:48:35,041 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 15:48:35,051 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-23 15:48:35,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:48:35,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:48:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:35,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:48:35,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-23 15:48:35,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 15:48:35,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 15:48:35,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-23 15:48:35,099 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2018-10-23 15:48:35,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:35,167 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-23 15:48:35,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 15:48:35,170 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-10-23 15:48:35,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:35,171 INFO L225 Difference]: With dead ends: 25 [2018-10-23 15:48:35,171 INFO L226 Difference]: Without dead ends: 21 [2018-10-23 15:48:35,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-23 15:48:35,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-23 15:48:35,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-10-23 15:48:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-23 15:48:35,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-23 15:48:35,176 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2018-10-23 15:48:35,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:35,176 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-23 15:48:35,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 15:48:35,176 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-23 15:48:35,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-23 15:48:35,177 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:35,177 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:35,178 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:35,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:35,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1123673519, now seen corresponding path program 4 times [2018-10-23 15:48:35,178 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:35,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:35,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:35,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:48:35,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:35,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:35,373 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 [2018-10-23 15:48:35,384 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 15:48:35,403 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 15:48:35,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:48:35,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:48:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:35,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:48:35,455 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-23 15:48:35,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 15:48:35,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 15:48:35,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-23 15:48:35,457 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2018-10-23 15:48:35,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:35,558 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-23 15:48:35,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 15:48:35,558 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-10-23 15:48:35,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:35,559 INFO L225 Difference]: With dead ends: 28 [2018-10-23 15:48:35,559 INFO L226 Difference]: Without dead ends: 24 [2018-10-23 15:48:35,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-23 15:48:35,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-23 15:48:35,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-10-23 15:48:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-23 15:48:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-23 15:48:35,564 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2018-10-23 15:48:35,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:35,564 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-23 15:48:35,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 15:48:35,564 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-23 15:48:35,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-23 15:48:35,565 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:35,565 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:35,565 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:35,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:35,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1173872398, now seen corresponding path program 5 times [2018-10-23 15:48:35,566 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:35,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:35,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:35,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:48:35,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:35,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:35,963 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 [2018-10-23 15:48:35,971 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 15:48:35,996 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-23 15:48:35,997 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:48:35,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:48:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:36,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:48:36,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-23 15:48:36,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 15:48:36,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 15:48:36,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-23 15:48:36,055 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 8 states. [2018-10-23 15:48:36,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:36,348 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-23 15:48:36,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-23 15:48:36,354 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-10-23 15:48:36,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:36,356 INFO L225 Difference]: With dead ends: 31 [2018-10-23 15:48:36,356 INFO L226 Difference]: Without dead ends: 27 [2018-10-23 15:48:36,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-23 15:48:36,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-23 15:48:36,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-10-23 15:48:36,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-23 15:48:36,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-23 15:48:36,361 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2018-10-23 15:48:36,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:36,362 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-23 15:48:36,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 15:48:36,362 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-23 15:48:36,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-23 15:48:36,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:36,363 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:36,363 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:36,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:36,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1529510607, now seen corresponding path program 6 times [2018-10-23 15:48:36,364 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:36,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:36,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:36,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:48:36,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:37,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:37,095 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-23 15:48:37,105 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 15:48:37,155 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-23 15:48:37,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:48:37,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:48:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:37,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:48:37,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-23 15:48:37,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 15:48:37,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 15:48:37,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-23 15:48:37,231 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2018-10-23 15:48:37,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:37,388 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-23 15:48:37,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 15:48:37,389 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-10-23 15:48:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:37,390 INFO L225 Difference]: With dead ends: 34 [2018-10-23 15:48:37,391 INFO L226 Difference]: Without dead ends: 30 [2018-10-23 15:48:37,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-23 15:48:37,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-23 15:48:37,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-23 15:48:37,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-23 15:48:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-23 15:48:37,396 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2018-10-23 15:48:37,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:37,397 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-23 15:48:37,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 15:48:37,397 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-23 15:48:37,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-23 15:48:37,398 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:37,398 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:37,398 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:37,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:37,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1214122030, now seen corresponding path program 7 times [2018-10-23 15:48:37,399 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:37,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:37,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:37,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:48:37,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:37,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:37,654 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 [2018-10-23 15:48:37,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:48:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:37,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:48:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:37,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:48:37,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-23 15:48:37,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 15:48:37,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 15:48:37,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-23 15:48:37,729 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 10 states. [2018-10-23 15:48:37,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:37,869 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-23 15:48:37,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 15:48:37,871 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-10-23 15:48:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:37,871 INFO L225 Difference]: With dead ends: 37 [2018-10-23 15:48:37,872 INFO L226 Difference]: Without dead ends: 33 [2018-10-23 15:48:37,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-23 15:48:37,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-23 15:48:37,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-10-23 15:48:37,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-23 15:48:37,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-23 15:48:37,876 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2018-10-23 15:48:37,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:37,877 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-23 15:48:37,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 15:48:37,877 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-23 15:48:37,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-23 15:48:37,878 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:37,878 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:37,878 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:37,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:37,879 INFO L82 PathProgramCache]: Analyzing trace with hash -748599279, now seen corresponding path program 8 times [2018-10-23 15:48:37,879 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:37,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:37,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:37,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:48:37,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:38,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:38,083 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-23 15:48:38,091 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 15:48:38,103 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 15:48:38,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:48:38,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:48:38,116 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:38,137 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:48:38,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-23 15:48:38,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 15:48:38,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 15:48:38,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-23 15:48:38,139 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2018-10-23 15:48:38,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:38,354 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-23 15:48:38,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 15:48:38,355 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-10-23 15:48:38,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:38,356 INFO L225 Difference]: With dead ends: 40 [2018-10-23 15:48:38,356 INFO L226 Difference]: Without dead ends: 36 [2018-10-23 15:48:38,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-23 15:48:38,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-23 15:48:38,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-10-23 15:48:38,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-23 15:48:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-23 15:48:38,362 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2018-10-23 15:48:38,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:38,363 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-23 15:48:38,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 15:48:38,363 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-23 15:48:38,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-23 15:48:38,364 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:38,364 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:38,364 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:38,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:38,365 INFO L82 PathProgramCache]: Analyzing trace with hash -494347954, now seen corresponding path program 9 times [2018-10-23 15:48:38,365 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:38,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:38,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:38,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:48:38,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:38,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:38,558 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 [2018-10-23 15:48:38,566 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 15:48:38,718 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-23 15:48:38,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:48:38,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:48:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:38,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:48:38,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-23 15:48:38,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 15:48:38,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 15:48:38,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-23 15:48:38,827 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 12 states. [2018-10-23 15:48:39,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:39,358 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-23 15:48:39,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-23 15:48:39,359 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-10-23 15:48:39,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:39,360 INFO L225 Difference]: With dead ends: 43 [2018-10-23 15:48:39,361 INFO L226 Difference]: Without dead ends: 39 [2018-10-23 15:48:39,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-23 15:48:39,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-23 15:48:39,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-10-23 15:48:39,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-23 15:48:39,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-23 15:48:39,368 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2018-10-23 15:48:39,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:39,368 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-23 15:48:39,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 15:48:39,369 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-23 15:48:39,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-23 15:48:39,370 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:39,370 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:39,370 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:39,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:39,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1879532273, now seen corresponding path program 10 times [2018-10-23 15:48:39,371 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:39,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:39,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:39,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:48:39,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:39,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:39,749 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 [2018-10-23 15:48:39,758 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 15:48:39,794 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 15:48:39,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:48:39,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:48:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:39,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:48:39,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-23 15:48:39,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 15:48:39,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 15:48:39,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-23 15:48:39,858 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 13 states. [2018-10-23 15:48:40,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:40,155 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-23 15:48:40,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-23 15:48:40,156 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-10-23 15:48:40,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:40,157 INFO L225 Difference]: With dead ends: 46 [2018-10-23 15:48:40,157 INFO L226 Difference]: Without dead ends: 42 [2018-10-23 15:48:40,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-23 15:48:40,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-23 15:48:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-10-23 15:48:40,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-23 15:48:40,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-23 15:48:40,164 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2018-10-23 15:48:40,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:40,165 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-23 15:48:40,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 15:48:40,165 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-23 15:48:40,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-23 15:48:40,166 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:40,166 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:40,166 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:40,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:40,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1213878894, now seen corresponding path program 11 times [2018-10-23 15:48:40,167 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:40,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:40,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:40,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:48:40,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:40,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:40,426 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-23 15:48:40,434 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 15:48:41,926 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-23 15:48:41,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:48:41,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:48:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:42,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:48:42,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-23 15:48:42,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-23 15:48:42,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-23 15:48:42,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-23 15:48:42,031 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 14 states. [2018-10-23 15:48:42,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:42,378 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-23 15:48:42,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-23 15:48:42,379 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2018-10-23 15:48:42,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:42,379 INFO L225 Difference]: With dead ends: 49 [2018-10-23 15:48:42,380 INFO L226 Difference]: Without dead ends: 45 [2018-10-23 15:48:42,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-23 15:48:42,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-23 15:48:42,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-10-23 15:48:42,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-23 15:48:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-23 15:48:42,386 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2018-10-23 15:48:42,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:42,387 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-23 15:48:42,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-23 15:48:42,387 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-23 15:48:42,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-23 15:48:42,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:42,388 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:42,388 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:42,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:42,389 INFO L82 PathProgramCache]: Analyzing trace with hash 598070737, now seen corresponding path program 12 times [2018-10-23 15:48:42,389 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:42,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:42,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:42,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:48:42,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:42,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:42,727 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 [2018-10-23 15:48:42,734 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 15:48:42,819 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-23 15:48:42,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:48:42,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:48:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:42,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:48:42,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-23 15:48:42,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-23 15:48:42,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-23 15:48:42,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-23 15:48:42,889 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 15 states. [2018-10-23 15:48:43,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:43,413 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-23 15:48:43,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-23 15:48:43,420 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-10-23 15:48:43,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:43,421 INFO L225 Difference]: With dead ends: 52 [2018-10-23 15:48:43,421 INFO L226 Difference]: Without dead ends: 48 [2018-10-23 15:48:43,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-23 15:48:43,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-23 15:48:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-10-23 15:48:43,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-23 15:48:43,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-23 15:48:43,427 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2018-10-23 15:48:43,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:43,427 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-23 15:48:43,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-23 15:48:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-23 15:48:43,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-23 15:48:43,428 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:43,429 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:43,429 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:43,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:43,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1137413234, now seen corresponding path program 13 times [2018-10-23 15:48:43,429 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:43,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:43,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:43,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:48:43,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:44,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:44,238 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:48:44,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:48:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:44,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:48:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:44,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:48:44,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-23 15:48:44,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-23 15:48:44,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-23 15:48:44,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-23 15:48:44,365 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 16 states. [2018-10-23 15:48:44,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:44,889 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-23 15:48:44,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-23 15:48:44,890 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2018-10-23 15:48:44,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:44,891 INFO L225 Difference]: With dead ends: 55 [2018-10-23 15:48:44,891 INFO L226 Difference]: Without dead ends: 51 [2018-10-23 15:48:44,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-23 15:48:44,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-23 15:48:44,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-10-23 15:48:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-23 15:48:44,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-23 15:48:44,900 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2018-10-23 15:48:44,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:44,900 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-23 15:48:44,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-23 15:48:44,901 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-23 15:48:44,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-23 15:48:44,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:44,902 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:44,902 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:44,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:44,902 INFO L82 PathProgramCache]: Analyzing trace with hash -124084047, now seen corresponding path program 14 times [2018-10-23 15:48:44,902 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:44,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:44,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:44,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:48:44,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:44,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:45,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:45,385 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:48:45,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 15:48:45,414 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 15:48:45,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:48:45,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:48:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:45,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:48:45,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-23 15:48:45,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-23 15:48:45,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-23 15:48:45,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-23 15:48:45,479 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 17 states. [2018-10-23 15:48:45,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:45,852 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-23 15:48:45,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-23 15:48:45,853 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2018-10-23 15:48:45,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:45,854 INFO L225 Difference]: With dead ends: 58 [2018-10-23 15:48:45,854 INFO L226 Difference]: Without dead ends: 54 [2018-10-23 15:48:45,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-23 15:48:45,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-23 15:48:45,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-10-23 15:48:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-23 15:48:45,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-23 15:48:45,860 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2018-10-23 15:48:45,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:45,861 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-23 15:48:45,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-23 15:48:45,861 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-23 15:48:45,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-23 15:48:45,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:45,862 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:45,862 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:45,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:45,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1359397714, now seen corresponding path program 15 times [2018-10-23 15:48:45,863 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:45,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:45,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:45,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:48:45,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:46,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:46,458 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:48:46,471 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 15:48:47,970 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-23 15:48:47,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:48:47,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:48:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:48,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:48:48,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-23 15:48:48,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-23 15:48:48,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-23 15:48:48,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-23 15:48:48,021 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 18 states. [2018-10-23 15:48:48,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:48,979 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-23 15:48:48,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-23 15:48:48,982 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-23 15:48:48,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:48,983 INFO L225 Difference]: With dead ends: 61 [2018-10-23 15:48:48,983 INFO L226 Difference]: Without dead ends: 57 [2018-10-23 15:48:48,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-23 15:48:48,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-23 15:48:48,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-10-23 15:48:48,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-23 15:48:48,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-23 15:48:48,989 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2018-10-23 15:48:48,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:48,989 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-23 15:48:48,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-23 15:48:48,990 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-23 15:48:48,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-23 15:48:48,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:48,990 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:48,991 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:48,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:48,991 INFO L82 PathProgramCache]: Analyzing trace with hash 985908113, now seen corresponding path program 16 times [2018-10-23 15:48:48,991 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:48,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:48,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:48,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:48:48,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:49,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:49,307 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:48:49,315 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 15:48:49,344 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 15:48:49,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:48:49,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:48:49,376 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:49,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:48:49,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-23 15:48:49,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-23 15:48:49,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-23 15:48:49,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-23 15:48:49,398 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 19 states. [2018-10-23 15:48:50,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:48:50,081 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-23 15:48:50,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-23 15:48:50,082 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2018-10-23 15:48:50,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:48:50,083 INFO L225 Difference]: With dead ends: 64 [2018-10-23 15:48:50,083 INFO L226 Difference]: Without dead ends: 60 [2018-10-23 15:48:50,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-23 15:48:50,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-23 15:48:50,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-10-23 15:48:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-23 15:48:50,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-23 15:48:50,088 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2018-10-23 15:48:50,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:48:50,089 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-23 15:48:50,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-23 15:48:50,089 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-23 15:48:50,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-23 15:48:50,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:48:50,090 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-23 15:48:50,090 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:48:50,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:48:50,090 INFO L82 PathProgramCache]: Analyzing trace with hash -536171058, now seen corresponding path program 17 times [2018-10-23 15:48:50,090 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:48:50,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:48:50,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:50,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:48:50,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:48:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:48:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:48:50,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:48:50,421 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:48:50,430 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 15:49:42,652 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-23 15:49:42,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:49:42,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:49:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:49:42,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:49:42,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-23 15:49:42,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-23 15:49:42,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-23 15:49:42,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-23 15:49:42,746 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 20 states. [2018-10-23 15:49:43,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:49:43,263 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-23 15:49:43,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-23 15:49:43,264 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2018-10-23 15:49:43,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:49:43,265 INFO L225 Difference]: With dead ends: 67 [2018-10-23 15:49:43,265 INFO L226 Difference]: Without dead ends: 63 [2018-10-23 15:49:43,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-23 15:49:43,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-23 15:49:43,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-10-23 15:49:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-23 15:49:43,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-23 15:49:43,271 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2018-10-23 15:49:43,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:49:43,271 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-23 15:49:43,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-23 15:49:43,271 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-23 15:49:43,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-23 15:49:43,272 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:49:43,272 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-23 15:49:43,273 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:49:43,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:49:43,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1467956849, now seen corresponding path program 18 times [2018-10-23 15:49:43,273 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:49:43,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:49:43,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:49:43,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:49:43,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:49:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:49:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:49:44,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:49:44,143 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:49:44,167 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 15:49:46,232 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-23 15:49:46,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:49:46,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:49:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:49:46,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:49:46,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-23 15:49:46,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-23 15:49:46,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-23 15:49:46,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-23 15:49:46,313 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 21 states. [2018-10-23 15:49:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:49:47,099 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-23 15:49:47,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-23 15:49:47,100 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2018-10-23 15:49:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:49:47,100 INFO L225 Difference]: With dead ends: 70 [2018-10-23 15:49:47,101 INFO L226 Difference]: Without dead ends: 66 [2018-10-23 15:49:47,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-23 15:49:47,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-23 15:49:47,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-10-23 15:49:47,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-23 15:49:47,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-23 15:49:47,107 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2018-10-23 15:49:47,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:49:47,107 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-23 15:49:47,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-23 15:49:47,107 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-23 15:49:47,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-23 15:49:47,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:49:47,108 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-23 15:49:47,108 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:49:47,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:49:47,109 INFO L82 PathProgramCache]: Analyzing trace with hash 2102052590, now seen corresponding path program 19 times [2018-10-23 15:49:47,109 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:49:47,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:49:47,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:49:47,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:49:47,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:49:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:49:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:49:47,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:49:47,827 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:49:47,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:49:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:49:47,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:49:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:49:47,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:49:47,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-23 15:49:47,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-23 15:49:47,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-23 15:49:47,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-23 15:49:47,906 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 22 states. [2018-10-23 15:49:48,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:49:48,494 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-23 15:49:48,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-23 15:49:48,495 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2018-10-23 15:49:48,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:49:48,496 INFO L225 Difference]: With dead ends: 73 [2018-10-23 15:49:48,496 INFO L226 Difference]: Without dead ends: 69 [2018-10-23 15:49:48,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-23 15:49:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-23 15:49:48,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-10-23 15:49:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-23 15:49:48,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-23 15:49:48,501 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2018-10-23 15:49:48,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:49:48,501 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-23 15:49:48,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-23 15:49:48,502 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-23 15:49:48,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-23 15:49:48,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:49:48,502 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-23 15:49:48,503 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:49:48,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:49:48,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1112862383, now seen corresponding path program 20 times [2018-10-23 15:49:48,503 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:49:48,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:49:48,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:49:48,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:49:48,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:49:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:49:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:49:49,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:49:49,416 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:49:49,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 15:49:49,445 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 15:49:49,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:49:49,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:49:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:49:49,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:49:49,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-23 15:49:49,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-23 15:49:49,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-23 15:49:49,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-23 15:49:49,498 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 23 states. [2018-10-23 15:49:50,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:49:50,141 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-23 15:49:50,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-23 15:49:50,142 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2018-10-23 15:49:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:49:50,143 INFO L225 Difference]: With dead ends: 76 [2018-10-23 15:49:50,143 INFO L226 Difference]: Without dead ends: 72 [2018-10-23 15:49:50,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-23 15:49:50,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-23 15:49:50,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2018-10-23 15:49:50,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-23 15:49:50,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-23 15:49:50,149 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2018-10-23 15:49:50,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:49:50,149 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-23 15:49:50,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-23 15:49:50,149 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-23 15:49:50,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-23 15:49:50,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:49:50,150 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-23 15:49:50,150 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:49:50,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:49:50,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1125877774, now seen corresponding path program 21 times [2018-10-23 15:49:50,150 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:49:50,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:49:50,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:49:50,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:49:50,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:49:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:49:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:49:51,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:49:51,785 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:49:51,792 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 15:49:54,067 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-23 15:49:54,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:49:54,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:49:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:49:54,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:49:54,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-23 15:49:54,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-23 15:49:54,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-23 15:49:54,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-23 15:49:54,141 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 24 states. [2018-10-23 15:49:54,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:49:54,857 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-23 15:49:54,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-23 15:49:54,858 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2018-10-23 15:49:54,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:49:54,859 INFO L225 Difference]: With dead ends: 79 [2018-10-23 15:49:54,859 INFO L226 Difference]: Without dead ends: 75 [2018-10-23 15:49:54,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-23 15:49:54,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-23 15:49:54,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-10-23 15:49:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-23 15:49:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-23 15:49:54,864 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2018-10-23 15:49:54,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:49:54,864 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-23 15:49:54,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-23 15:49:54,864 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-23 15:49:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-23 15:49:54,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:49:54,865 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-23 15:49:54,865 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:49:54,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:49:54,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1113244623, now seen corresponding path program 22 times [2018-10-23 15:49:54,865 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:49:54,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:49:54,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:49:54,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:49:54,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:49:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:49:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:49:55,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:49:55,800 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:49:55,809 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 15:49:55,837 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 15:49:55,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:49:55,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:49:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:49:55,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:49:55,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-23 15:49:55,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-23 15:49:55,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-23 15:49:55,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-23 15:49:55,897 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 25 states. [2018-10-23 15:49:56,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:49:56,790 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-23 15:49:56,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-23 15:49:56,791 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2018-10-23 15:49:56,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:49:56,792 INFO L225 Difference]: With dead ends: 82 [2018-10-23 15:49:56,792 INFO L226 Difference]: Without dead ends: 78 [2018-10-23 15:49:56,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-23 15:49:56,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-23 15:49:56,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-10-23 15:49:56,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-23 15:49:56,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-23 15:49:56,799 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 73 [2018-10-23 15:49:56,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:49:56,800 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-23 15:49:56,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-23 15:49:56,800 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-23 15:49:56,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-23 15:49:56,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:49:56,801 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-23 15:49:56,801 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:49:56,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:49:56,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1671499474, now seen corresponding path program 23 times [2018-10-23 15:49:56,802 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:49:56,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:49:56,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:49:56,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:49:56,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:49:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:49:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:49:58,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:49:58,083 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:49:58,092 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 15:51:26,075 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-23 15:51:26,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:51:26,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:51:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:51:26,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:51:26,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-23 15:51:26,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-23 15:51:26,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-23 15:51:26,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-23 15:51:26,382 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 26 states. [2018-10-23 15:51:27,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:51:27,445 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-23 15:51:27,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-23 15:51:27,446 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 76 [2018-10-23 15:51:27,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:51:27,447 INFO L225 Difference]: With dead ends: 85 [2018-10-23 15:51:27,447 INFO L226 Difference]: Without dead ends: 81 [2018-10-23 15:51:27,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-23 15:51:27,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-23 15:51:27,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2018-10-23 15:51:27,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-23 15:51:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-23 15:51:27,452 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 76 [2018-10-23 15:51:27,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:51:27,452 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-23 15:51:27,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-23 15:51:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-23 15:51:27,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-23 15:51:27,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:51:27,454 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-23 15:51:27,454 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:51:27,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:51:27,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1766571793, now seen corresponding path program 24 times [2018-10-23 15:51:27,454 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:51:27,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:51:27,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:51:27,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:51:27,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:51:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:51:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:51:28,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:51:28,100 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:51:28,109 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 15:52:15,695 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-23 15:52:15,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:52:15,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:52:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:52:15,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:52:15,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-23 15:52:15,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-23 15:52:15,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-23 15:52:15,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-23 15:52:15,858 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 27 states. [2018-10-23 15:52:16,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:52:16,736 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-23 15:52:16,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-23 15:52:16,736 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2018-10-23 15:52:16,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:52:16,737 INFO L225 Difference]: With dead ends: 88 [2018-10-23 15:52:16,737 INFO L226 Difference]: Without dead ends: 84 [2018-10-23 15:52:16,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-23 15:52:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-23 15:52:16,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2018-10-23 15:52:16,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-23 15:52:16,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-23 15:52:16,742 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 79 [2018-10-23 15:52:16,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:52:16,743 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-23 15:52:16,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-23 15:52:16,743 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-23 15:52:16,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-23 15:52:16,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:52:16,744 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-23 15:52:16,744 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:52:16,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:52:16,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1032388018, now seen corresponding path program 25 times [2018-10-23 15:52:16,744 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:52:16,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:52:16,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:52:16,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:52:16,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:52:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:52:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:52:17,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:52:17,308 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:52:17,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:52:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:52:17,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:52:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:52:17,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:52:17,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-23 15:52:17,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-23 15:52:17,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-23 15:52:17,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-23 15:52:17,395 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 28 states. [2018-10-23 15:52:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:52:18,332 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-23 15:52:18,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-23 15:52:18,333 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 82 [2018-10-23 15:52:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:52:18,334 INFO L225 Difference]: With dead ends: 91 [2018-10-23 15:52:18,334 INFO L226 Difference]: Without dead ends: 87 [2018-10-23 15:52:18,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-23 15:52:18,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-23 15:52:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2018-10-23 15:52:18,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-23 15:52:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-23 15:52:18,339 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 82 [2018-10-23 15:52:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:52:18,340 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-23 15:52:18,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-23 15:52:18,340 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-23 15:52:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-23 15:52:18,340 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:52:18,340 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-23 15:52:18,341 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:52:18,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:52:18,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1945934321, now seen corresponding path program 26 times [2018-10-23 15:52:18,341 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:52:18,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:52:18,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:52:18,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:52:18,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:52:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:52:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:52:18,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:52:18,976 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:52:18,993 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 15:52:19,029 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 15:52:19,029 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:52:19,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:52:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:52:19,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:52:19,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-23 15:52:19,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-23 15:52:19,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-23 15:52:19,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-23 15:52:19,080 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 29 states. [2018-10-23 15:52:20,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:52:20,230 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-23 15:52:20,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-23 15:52:20,230 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2018-10-23 15:52:20,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:52:20,231 INFO L225 Difference]: With dead ends: 94 [2018-10-23 15:52:20,231 INFO L226 Difference]: Without dead ends: 90 [2018-10-23 15:52:20,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-23 15:52:20,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-23 15:52:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-10-23 15:52:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-23 15:52:20,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-23 15:52:20,238 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 85 [2018-10-23 15:52:20,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:52:20,238 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-23 15:52:20,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-23 15:52:20,238 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-23 15:52:20,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-23 15:52:20,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:52:20,239 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-23 15:52:20,239 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:52:20,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:52:20,239 INFO L82 PathProgramCache]: Analyzing trace with hash -582632594, now seen corresponding path program 27 times [2018-10-23 15:52:20,239 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:52:20,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:52:20,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:52:20,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:52:20,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:52:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:52:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:52:21,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:52:21,562 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:52:21,571 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown