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-new/count_by_2_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:50:43,856 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:50:43,858 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:50:43,876 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:50:43,876 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:50:43,877 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:50:43,878 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:50:43,880 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:50:43,883 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:50:43,883 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:50:43,885 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:50:43,885 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:50:43,893 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:50:43,894 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:50:43,895 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:50:43,899 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:50:43,900 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:50:43,901 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:50:43,903 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:50:43,905 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:50:43,907 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:50:43,909 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:50:43,913 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:50:43,927 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-22 15:50:43,958 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:50:43,958 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:50:43,960 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:50:43,960 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:50:43,961 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:50:43,961 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:50:43,961 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:50:43,961 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:50:43,962 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:50:43,963 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:50:43,963 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:50:43,964 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:50:43,964 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:50:43,964 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:50:43,964 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:50:43,964 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:50:43,964 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:50:43,965 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:50:43,965 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:50:43,965 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:50:43,965 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:50:43,965 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:50:43,966 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:50:43,966 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:50:43,966 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:50:43,966 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:50:43,966 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:50:43,967 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:50:44,025 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:50:44,044 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:50:44,047 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:50:44,048 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:50:44,048 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:50:44,049 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/count_by_2_true-unreach-call_true-termination.i [2018-10-22 15:50:44,107 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4bbe2a0e6/855eb508b4864f62a4b05f061e8099de/FLAG4b8b5b9d6 [2018-10-22 15:50:44,562 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:50:44,562 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_2_true-unreach-call_true-termination.i [2018-10-22 15:50:44,569 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4bbe2a0e6/855eb508b4864f62a4b05f061e8099de/FLAG4b8b5b9d6 [2018-10-22 15:50:44,584 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4bbe2a0e6/855eb508b4864f62a4b05f061e8099de [2018-10-22 15:50:44,594 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:50:44,595 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:50:44,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:50:44,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:50:44,600 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:50:44,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:50:44" (1/1) ... [2018-10-22 15:50:44,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6609cc8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:44, skipping insertion in model container [2018-10-22 15:50:44,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:50:44" (1/1) ... [2018-10-22 15:50:44,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:50:44,633 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:50:44,865 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:50:44,870 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:50:44,889 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:50:44,908 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:50:44,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:44 WrapperNode [2018-10-22 15:50:44,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:50:44,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:50:44,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:50:44,911 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:50:44,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:44" (1/1) ... [2018-10-22 15:50:44,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:44" (1/1) ... [2018-10-22 15:50:44,948 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:50:44,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:50:44,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:50:44,949 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:50:44,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:44" (1/1) ... [2018-10-22 15:50:44,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:44" (1/1) ... [2018-10-22 15:50:44,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:44" (1/1) ... [2018-10-22 15:50:44,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:44" (1/1) ... [2018-10-22 15:50:44,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:44" (1/1) ... [2018-10-22 15:50:44,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:44" (1/1) ... [2018-10-22 15:50:44,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:44" (1/1) ... [2018-10-22 15:50:44,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:50:44,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:50:44,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:50:44,973 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:50:44,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:50:45,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:50:45,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:50:45,294 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:50:45,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:50:45 BoogieIcfgContainer [2018-10-22 15:50:45,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:50:45,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:50:45,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:50:45,299 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:50:45,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:50:44" (1/3) ... [2018-10-22 15:50:45,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ffbc3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:50:45, skipping insertion in model container [2018-10-22 15:50:45,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:50:44" (2/3) ... [2018-10-22 15:50:45,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ffbc3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:50:45, skipping insertion in model container [2018-10-22 15:50:45,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:50:45" (3/3) ... [2018-10-22 15:50:45,304 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_2_true-unreach-call_true-termination.i [2018-10-22 15:50:45,314 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:50:45,321 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:50:45,339 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:50:45,371 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:50:45,372 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:50:45,372 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:50:45,372 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:50:45,373 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:50:45,373 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:50:45,373 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:50:45,373 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:50:45,373 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:50:45,390 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-10-22 15:50:45,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-22 15:50:45,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:45,398 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-22 15:50:45,400 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:45,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:45,407 INFO L82 PathProgramCache]: Analyzing trace with hash 889814567, now seen corresponding path program 1 times [2018-10-22 15:50:45,408 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:45,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:45,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:45,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:45,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:45,532 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:50:45,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:50:45,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:50:45,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:50:45,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:50:45,554 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-10-22 15:50:45,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:45,574 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-10-22 15:50:45,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:50:45,575 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-22 15:50:45,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:45,585 INFO L225 Difference]: With dead ends: 21 [2018-10-22 15:50:45,585 INFO L226 Difference]: Without dead ends: 9 [2018-10-22 15:50:45,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:50:45,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-22 15:50:45,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-22 15:50:45,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-22 15:50:45,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-22 15:50:45,626 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-22 15:50:45,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:45,627 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-22 15:50:45,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:50:45,627 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-22 15:50:45,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-22 15:50:45,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:45,628 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:45,628 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:45,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:45,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1805894861, now seen corresponding path program 1 times [2018-10-22 15:50:45,629 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:45,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:45,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:45,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:45,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:45,687 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:50:45,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:50:45,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:50:45,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:50:45,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:50:45,691 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2018-10-22 15:50:45,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:45,782 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-22 15:50:45,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:50:45,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-22 15:50:45,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:45,783 INFO L225 Difference]: With dead ends: 16 [2018-10-22 15:50:45,784 INFO L226 Difference]: Without dead ends: 12 [2018-10-22 15:50:45,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:50:45,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-22 15:50:45,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-10-22 15:50:45,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-22 15:50:45,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-22 15:50:45,789 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2018-10-22 15:50:45,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:45,790 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-22 15:50:45,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:50:45,790 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-22 15:50:45,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:50:45,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:45,791 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:45,791 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:45,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:45,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1994321781, now seen corresponding path program 1 times [2018-10-22 15:50:45,792 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:45,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:45,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:45,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:45,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:45,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:45,943 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:45,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:45,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:46,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:46,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-22 15:50:46,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:50:46,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:50:46,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:50:46,030 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2018-10-22 15:50:46,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:46,104 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-22 15:50:46,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:50:46,105 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-22 15:50:46,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:46,106 INFO L225 Difference]: With dead ends: 19 [2018-10-22 15:50:46,106 INFO L226 Difference]: Without dead ends: 15 [2018-10-22 15:50:46,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:50:46,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-22 15:50:46,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-10-22 15:50:46,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 15:50:46,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-22 15:50:46,111 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2018-10-22 15:50:46,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:46,111 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-22 15:50:46,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:50:46,112 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-22 15:50:46,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 15:50:46,112 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:46,113 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:46,113 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:46,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:46,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1089618957, now seen corresponding path program 2 times [2018-10-22 15:50:46,114 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:46,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:46,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:46,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:46,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:46,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:46,200 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:46,211 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:46,231 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:46,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:46,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:46,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:46,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-22 15:50:46,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:50:46,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:50:46,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:50:46,264 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2018-10-22 15:50:46,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:46,338 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-22 15:50:46,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:50:46,339 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-22 15:50:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:46,339 INFO L225 Difference]: With dead ends: 22 [2018-10-22 15:50:46,340 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 15:50:46,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:50:46,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 15:50:46,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-22 15:50:46,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-22 15:50:46,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-22 15:50:46,345 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2018-10-22 15:50:46,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:46,345 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-22 15:50:46,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:50:46,345 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-22 15:50:46,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 15:50:46,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:46,346 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:46,346 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:46,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:46,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1122715979, now seen corresponding path program 3 times [2018-10-22 15:50:46,347 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:46,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:46,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:46,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:46,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:46,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:46,500 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:46,509 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:46,525 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:50:46,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:46,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:46,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:46,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-22 15:50:46,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:50:46,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:50:46,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:50:46,576 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2018-10-22 15:50:46,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:46,744 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-22 15:50:46,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:50:46,745 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2018-10-22 15:50:46,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:46,746 INFO L225 Difference]: With dead ends: 25 [2018-10-22 15:50:46,746 INFO L226 Difference]: Without dead ends: 21 [2018-10-22 15:50:46,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:50:46,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-22 15:50:46,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-10-22 15:50:46,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-22 15:50:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-22 15:50:46,751 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2018-10-22 15:50:46,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:46,751 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-22 15:50:46,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:50:46,751 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-22 15:50:46,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 15:50:46,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:46,753 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:46,753 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:46,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:46,753 INFO L82 PathProgramCache]: Analyzing trace with hash -726379699, now seen corresponding path program 4 times [2018-10-22 15:50:46,754 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:46,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:46,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:46,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:46,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:46,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:46,919 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:46,928 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:46,937 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:46,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:46,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:46,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:46,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-22 15:50:46,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:50:46,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:50:46,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:50:46,975 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2018-10-22 15:50:47,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:47,026 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-22 15:50:47,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:50:47,027 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-10-22 15:50:47,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:47,028 INFO L225 Difference]: With dead ends: 28 [2018-10-22 15:50:47,029 INFO L226 Difference]: Without dead ends: 24 [2018-10-22 15:50:47,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:50:47,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-22 15:50:47,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-10-22 15:50:47,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-22 15:50:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-22 15:50:47,034 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2018-10-22 15:50:47,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:47,034 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-22 15:50:47,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:50:47,035 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-22 15:50:47,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-22 15:50:47,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:47,036 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:47,036 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:47,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:47,036 INFO L82 PathProgramCache]: Analyzing trace with hash 114815499, now seen corresponding path program 5 times [2018-10-22 15:50:47,037 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:47,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:47,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:47,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:47,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:47,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:47,281 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:47,290 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:47,309 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 15:50:47,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:47,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:47,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:47,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-22 15:50:47,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:50:47,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:50:47,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:50:47,348 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 8 states. [2018-10-22 15:50:47,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:47,414 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-22 15:50:47,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:50:47,415 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-10-22 15:50:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:47,416 INFO L225 Difference]: With dead ends: 31 [2018-10-22 15:50:47,416 INFO L226 Difference]: Without dead ends: 27 [2018-10-22 15:50:47,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:50:47,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-22 15:50:47,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-10-22 15:50:47,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-22 15:50:47,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-22 15:50:47,421 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2018-10-22 15:50:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:47,422 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-22 15:50:47,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:50:47,422 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-22 15:50:47,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-22 15:50:47,423 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:47,423 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:47,423 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:47,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:47,423 INFO L82 PathProgramCache]: Analyzing trace with hash -973213043, now seen corresponding path program 6 times [2018-10-22 15:50:47,424 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:47,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:47,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:47,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:47,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:47,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:47,559 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:47,577 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:47,593 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 15:50:47,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:47,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:47,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:47,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-22 15:50:47,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:50:47,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:50:47,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:50:47,633 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2018-10-22 15:50:47,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:47,896 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-22 15:50:47,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:50:47,897 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-10-22 15:50:47,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:47,898 INFO L225 Difference]: With dead ends: 34 [2018-10-22 15:50:47,898 INFO L226 Difference]: Without dead ends: 30 [2018-10-22 15:50:47,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:50:47,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-22 15:50:47,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-22 15:50:47,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-22 15:50:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-22 15:50:47,909 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2018-10-22 15:50:47,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:47,909 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-22 15:50:47,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:50:47,910 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-22 15:50:47,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-22 15:50:47,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:47,911 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:47,912 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:47,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:47,912 INFO L82 PathProgramCache]: Analyzing trace with hash -313324853, now seen corresponding path program 7 times [2018-10-22 15:50:47,912 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:47,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:47,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:47,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:47,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:48,155 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:48,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:48,156 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:48,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:48,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:48,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:48,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-22 15:50:48,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:50:48,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:50:48,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:50:48,211 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 10 states. [2018-10-22 15:50:48,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:48,277 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-22 15:50:48,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:50:48,278 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2018-10-22 15:50:48,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:48,280 INFO L225 Difference]: With dead ends: 37 [2018-10-22 15:50:48,280 INFO L226 Difference]: Without dead ends: 33 [2018-10-22 15:50:48,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:50:48,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-22 15:50:48,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-10-22 15:50:48,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-22 15:50:48,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-22 15:50:48,285 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2018-10-22 15:50:48,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:48,285 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-22 15:50:48,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:50:48,286 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-22 15:50:48,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-22 15:50:48,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:48,287 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:48,287 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:48,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:48,288 INFO L82 PathProgramCache]: Analyzing trace with hash 350429645, now seen corresponding path program 8 times [2018-10-22 15:50:48,288 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:48,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:48,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:48,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:48,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:48,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:48,544 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:48,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:48,582 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:48,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:48,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:48,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:48,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-22 15:50:48,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:50:48,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:50:48,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:50:48,625 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2018-10-22 15:50:48,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:48,693 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-22 15:50:48,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:50:48,694 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2018-10-22 15:50:48,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:48,695 INFO L225 Difference]: With dead ends: 40 [2018-10-22 15:50:48,695 INFO L226 Difference]: Without dead ends: 36 [2018-10-22 15:50:48,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:50:48,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-22 15:50:48,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-10-22 15:50:48,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-22 15:50:48,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-22 15:50:48,700 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2018-10-22 15:50:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:48,701 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-22 15:50:48,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:50:48,701 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-22 15:50:48,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-22 15:50:48,702 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:48,702 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:48,703 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:48,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:48,703 INFO L82 PathProgramCache]: Analyzing trace with hash 231248779, now seen corresponding path program 9 times [2018-10-22 15:50:48,703 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:48,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:48,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:48,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:48,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:48,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:48,892 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:48,903 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:48,922 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-22 15:50:48,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:48,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:48,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:48,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-22 15:50:48,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:50:48,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:50:48,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:50:48,959 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 12 states. [2018-10-22 15:50:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:49,323 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-22 15:50:49,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:50:49,323 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-10-22 15:50:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:49,324 INFO L225 Difference]: With dead ends: 43 [2018-10-22 15:50:49,324 INFO L226 Difference]: Without dead ends: 39 [2018-10-22 15:50:49,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:50:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-22 15:50:49,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-10-22 15:50:49,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-22 15:50:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-22 15:50:49,330 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2018-10-22 15:50:49,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:49,330 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-22 15:50:49,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:50:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-22 15:50:49,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-22 15:50:49,331 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:49,331 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:49,332 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:49,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:49,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1652023565, now seen corresponding path program 10 times [2018-10-22 15:50:49,332 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:49,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:49,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:49,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:49,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:49,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:49,579 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:49,587 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:49,626 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:49,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:49,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:49,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:49,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-22 15:50:49,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:50:49,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:50:49,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:50:49,671 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 13 states. [2018-10-22 15:50:49,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:49,772 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-22 15:50:49,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:50:49,772 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-10-22 15:50:49,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:49,773 INFO L225 Difference]: With dead ends: 46 [2018-10-22 15:50:49,774 INFO L226 Difference]: Without dead ends: 42 [2018-10-22 15:50:49,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:50:49,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-22 15:50:49,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-10-22 15:50:49,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-22 15:50:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-22 15:50:49,779 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2018-10-22 15:50:49,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:49,779 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-22 15:50:49,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:50:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-22 15:50:49,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-22 15:50:49,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:49,781 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:49,781 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:49,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:49,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1050971211, now seen corresponding path program 11 times [2018-10-22 15:50:49,781 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:49,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:49,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:49,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:49,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:49,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:49,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:49,952 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:49,960 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:50,021 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-22 15:50:50,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:50,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:50,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:50,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-22 15:50:50,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:50:50,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:50:50,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:50:50,061 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 14 states. [2018-10-22 15:50:50,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:50,138 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-22 15:50:50,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:50:50,139 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2018-10-22 15:50:50,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:50,140 INFO L225 Difference]: With dead ends: 49 [2018-10-22 15:50:50,141 INFO L226 Difference]: Without dead ends: 45 [2018-10-22 15:50:50,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:50:50,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-22 15:50:50,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-10-22 15:50:50,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-22 15:50:50,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-22 15:50:50,145 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2018-10-22 15:50:50,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:50,145 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-22 15:50:50,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:50:50,145 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-22 15:50:50,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-22 15:50:50,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:50,146 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:50,147 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:50,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:50,147 INFO L82 PathProgramCache]: Analyzing trace with hash 818950221, now seen corresponding path program 12 times [2018-10-22 15:50:50,147 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:50,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:50,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:50,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:50,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:50,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:50,355 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:50,364 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:50,379 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-22 15:50:50,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:50,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:50,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:50,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-22 15:50:50,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:50:50,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:50:50,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:50:50,418 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 15 states. [2018-10-22 15:50:50,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:50,478 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-22 15:50:50,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:50:50,479 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2018-10-22 15:50:50,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:50,480 INFO L225 Difference]: With dead ends: 52 [2018-10-22 15:50:50,480 INFO L226 Difference]: Without dead ends: 48 [2018-10-22 15:50:50,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:50:50,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-22 15:50:50,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-10-22 15:50:50,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-22 15:50:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-22 15:50:50,486 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2018-10-22 15:50:50,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:50,486 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-22 15:50:50,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:50:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-22 15:50:50,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-22 15:50:50,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:50,488 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:50,488 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:50,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:50,488 INFO L82 PathProgramCache]: Analyzing trace with hash -715983605, now seen corresponding path program 13 times [2018-10-22 15:50:50,489 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:50,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:50,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:50,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:50,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:50,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:50,720 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:50,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:50,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:50,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:50,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-22 15:50:50,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:50:50,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:50:50,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:50:50,777 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 16 states. [2018-10-22 15:50:50,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:50,887 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-22 15:50:50,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:50:50,887 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2018-10-22 15:50:50,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:50,888 INFO L225 Difference]: With dead ends: 55 [2018-10-22 15:50:50,888 INFO L226 Difference]: Without dead ends: 51 [2018-10-22 15:50:50,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:50:50,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-22 15:50:50,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-10-22 15:50:50,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-22 15:50:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-22 15:50:50,894 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2018-10-22 15:50:50,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:50,894 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-22 15:50:50,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:50:50,894 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-22 15:50:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-22 15:50:50,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:50,895 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:50,896 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:50,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:50,896 INFO L82 PathProgramCache]: Analyzing trace with hash 587206541, now seen corresponding path program 14 times [2018-10-22 15:50:50,896 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:50,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:50,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:50,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:50,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:51,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:51,116 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:51,124 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:51,135 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:51,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:51,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:51,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:51,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-22 15:50:51,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:50:51,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:50:51,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:50:51,178 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 17 states. [2018-10-22 15:50:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:51,257 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-22 15:50:51,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:50:51,258 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2018-10-22 15:50:51,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:51,259 INFO L225 Difference]: With dead ends: 58 [2018-10-22 15:50:51,259 INFO L226 Difference]: Without dead ends: 54 [2018-10-22 15:50:51,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:50:51,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-22 15:50:51,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-10-22 15:50:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-22 15:50:51,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-22 15:50:51,267 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2018-10-22 15:50:51,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:51,268 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-22 15:50:51,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:50:51,268 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-22 15:50:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-22 15:50:51,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:51,269 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:51,269 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:51,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:51,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1715457483, now seen corresponding path program 15 times [2018-10-22 15:50:51,270 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:51,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:51,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:51,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:51,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:51,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:51,548 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:51,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:51,579 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-22 15:50:51,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:51,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:51,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:51,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-22 15:50:51,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:50:51,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:50:51,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:50:51,622 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 18 states. [2018-10-22 15:50:51,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:51,836 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-22 15:50:51,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:50:51,837 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-22 15:50:51,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:51,838 INFO L225 Difference]: With dead ends: 61 [2018-10-22 15:50:51,838 INFO L226 Difference]: Without dead ends: 57 [2018-10-22 15:50:51,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:50:51,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-22 15:50:51,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-10-22 15:50:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-22 15:50:51,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-22 15:50:51,845 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2018-10-22 15:50:51,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:51,845 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-22 15:50:51,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:50:51,846 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-22 15:50:51,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-22 15:50:51,852 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:51,852 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:51,852 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:51,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:51,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1025212109, now seen corresponding path program 16 times [2018-10-22 15:50:51,853 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:51,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:51,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:51,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:51,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:52,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:52,421 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:52,428 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:52,453 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:52,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:52,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:52,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:52,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-22 15:50:52,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:50:52,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:50:52,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:50:52,503 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 19 states. [2018-10-22 15:50:52,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:52,619 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-22 15:50:52,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-22 15:50:52,621 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2018-10-22 15:50:52,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:52,622 INFO L225 Difference]: With dead ends: 64 [2018-10-22 15:50:52,622 INFO L226 Difference]: Without dead ends: 60 [2018-10-22 15:50:52,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:50:52,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-22 15:50:52,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-10-22 15:50:52,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-22 15:50:52,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-22 15:50:52,627 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2018-10-22 15:50:52,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:52,627 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-22 15:50:52,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:50:52,627 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-22 15:50:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-22 15:50:52,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:52,628 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:52,628 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:52,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:52,628 INFO L82 PathProgramCache]: Analyzing trace with hash -2066278773, now seen corresponding path program 17 times [2018-10-22 15:50:52,629 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:52,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:52,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:52,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:52,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:52,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:52,835 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:52,843 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:52,867 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-22 15:50:52,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:52,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:52,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:52,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-22 15:50:52,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:50:52,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:50:52,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:50:52,915 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 20 states. [2018-10-22 15:50:53,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:53,051 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-22 15:50:53,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:50:53,051 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2018-10-22 15:50:53,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:53,052 INFO L225 Difference]: With dead ends: 67 [2018-10-22 15:50:53,053 INFO L226 Difference]: Without dead ends: 63 [2018-10-22 15:50:53,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:50:53,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-22 15:50:53,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-10-22 15:50:53,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-22 15:50:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-22 15:50:53,058 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2018-10-22 15:50:53,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:53,058 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-22 15:50:53,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:50:53,058 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-22 15:50:53,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-22 15:50:53,059 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:53,059 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:53,059 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:53,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:53,060 INFO L82 PathProgramCache]: Analyzing trace with hash 607550989, now seen corresponding path program 18 times [2018-10-22 15:50:53,060 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:53,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:53,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:53,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:53,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:53,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:53,324 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:53,333 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:53,356 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-22 15:50:53,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:53,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:53,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:53,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-22 15:50:53,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:50:53,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:50:53,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:50:53,393 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 21 states. [2018-10-22 15:50:53,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:53,677 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-22 15:50:53,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 15:50:53,677 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2018-10-22 15:50:53,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:53,678 INFO L225 Difference]: With dead ends: 70 [2018-10-22 15:50:53,678 INFO L226 Difference]: Without dead ends: 66 [2018-10-22 15:50:53,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:50:53,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-22 15:50:53,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-10-22 15:50:53,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-22 15:50:53,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-22 15:50:53,682 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2018-10-22 15:50:53,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:53,682 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-22 15:50:53,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:50:53,683 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-22 15:50:53,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-22 15:50:53,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:53,683 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:53,684 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:53,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:53,684 INFO L82 PathProgramCache]: Analyzing trace with hash -2088448181, now seen corresponding path program 19 times [2018-10-22 15:50:53,684 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:53,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:53,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:53,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:53,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:54,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:54,379 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:54,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:54,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:54,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:54,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-22 15:50:54,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:50:54,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:50:54,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:50:54,460 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 22 states. [2018-10-22 15:50:54,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:54,635 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-22 15:50:54,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:50:54,635 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2018-10-22 15:50:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:54,636 INFO L225 Difference]: With dead ends: 73 [2018-10-22 15:50:54,636 INFO L226 Difference]: Without dead ends: 69 [2018-10-22 15:50:54,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:50:54,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-22 15:50:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-10-22 15:50:54,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-22 15:50:54,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-22 15:50:54,640 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2018-10-22 15:50:54,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:54,641 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-22 15:50:54,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:50:54,641 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-22 15:50:54,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-22 15:50:54,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:54,642 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:54,642 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:54,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:54,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1583680845, now seen corresponding path program 20 times [2018-10-22 15:50:54,643 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:54,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:54,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:54,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:54,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:54,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:54,908 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:54,915 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:50:54,947 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:50:54,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:54,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:54,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:54,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-22 15:50:54,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:50:54,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:50:54,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:50:54,991 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 23 states. [2018-10-22 15:50:55,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:55,103 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-22 15:50:55,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:50:55,105 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2018-10-22 15:50:55,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:55,106 INFO L225 Difference]: With dead ends: 76 [2018-10-22 15:50:55,106 INFO L226 Difference]: Without dead ends: 72 [2018-10-22 15:50:55,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:50:55,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-22 15:50:55,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2018-10-22 15:50:55,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-22 15:50:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-22 15:50:55,110 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2018-10-22 15:50:55,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:55,111 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-22 15:50:55,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:50:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-22 15:50:55,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-22 15:50:55,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:55,112 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:55,112 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:55,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:55,112 INFO L82 PathProgramCache]: Analyzing trace with hash 867497995, now seen corresponding path program 21 times [2018-10-22 15:50:55,112 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:55,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:55,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:55,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:55,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:55,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:55,540 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:55,547 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:50:55,665 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-22 15:50:55,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:55,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:55,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:55,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-22 15:50:55,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 15:50:55,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 15:50:55,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:50:55,714 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 24 states. [2018-10-22 15:50:55,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:55,845 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-22 15:50:55,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 15:50:55,845 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2018-10-22 15:50:55,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:55,846 INFO L225 Difference]: With dead ends: 79 [2018-10-22 15:50:55,846 INFO L226 Difference]: Without dead ends: 75 [2018-10-22 15:50:55,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:50:55,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-22 15:50:55,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-10-22 15:50:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-22 15:50:55,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-22 15:50:55,848 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2018-10-22 15:50:55,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:55,849 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-22 15:50:55,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 15:50:55,849 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-22 15:50:55,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-22 15:50:55,849 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:55,849 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:55,850 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:55,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:55,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1833227123, now seen corresponding path program 22 times [2018-10-22 15:50:55,850 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:55,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:55,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:55,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:55,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:56,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:56,896 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:56,903 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:50:56,919 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:50:56,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:56,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:56,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:56,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-22 15:50:56,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:50:56,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:50:56,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:50:56,968 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 25 states. [2018-10-22 15:50:57,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:57,140 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-22 15:50:57,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-22 15:50:57,141 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2018-10-22 15:50:57,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:57,142 INFO L225 Difference]: With dead ends: 82 [2018-10-22 15:50:57,142 INFO L226 Difference]: Without dead ends: 78 [2018-10-22 15:50:57,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:50:57,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-22 15:50:57,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-10-22 15:50:57,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-22 15:50:57,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-22 15:50:57,147 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 73 [2018-10-22 15:50:57,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:57,147 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-22 15:50:57,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:50:57,148 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-22 15:50:57,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-22 15:50:57,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:57,148 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:57,148 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:57,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:57,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1512861493, now seen corresponding path program 23 times [2018-10-22 15:50:57,149 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:57,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:57,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:57,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:57,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:57,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:57,854 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:57,862 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:50:57,882 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-22 15:50:57,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:57,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:57,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:57,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-22 15:50:57,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-22 15:50:57,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-22 15:50:57,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:50:57,930 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 26 states. [2018-10-22 15:50:58,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:58,101 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-22 15:50:58,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:50:58,101 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 76 [2018-10-22 15:50:58,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:58,102 INFO L225 Difference]: With dead ends: 85 [2018-10-22 15:50:58,102 INFO L226 Difference]: Without dead ends: 81 [2018-10-22 15:50:58,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:50:58,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-22 15:50:58,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2018-10-22 15:50:58,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-22 15:50:58,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-22 15:50:58,107 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 76 [2018-10-22 15:50:58,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:58,107 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-22 15:50:58,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-22 15:50:58,107 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-22 15:50:58,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-22 15:50:58,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:58,108 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:58,108 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:58,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:58,109 INFO L82 PathProgramCache]: Analyzing trace with hash -917709875, now seen corresponding path program 24 times [2018-10-22 15:50:58,109 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:58,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:58,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:58,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:58,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:58,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:58,871 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:58,878 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:50:58,904 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-22 15:50:58,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:50:58,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:58,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:50:58,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-22 15:50:58,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 15:50:58,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 15:50:58,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:50:58,960 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 27 states. [2018-10-22 15:50:59,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:50:59,073 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-22 15:50:59,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 15:50:59,073 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2018-10-22 15:50:59,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:50:59,074 INFO L225 Difference]: With dead ends: 88 [2018-10-22 15:50:59,074 INFO L226 Difference]: Without dead ends: 84 [2018-10-22 15:50:59,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:50:59,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-22 15:50:59,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2018-10-22 15:50:59,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-22 15:50:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-22 15:50:59,080 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 79 [2018-10-22 15:50:59,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:50:59,080 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-22 15:50:59,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 15:50:59,080 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-22 15:50:59,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-22 15:50:59,081 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:50:59,081 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-22 15:50:59,081 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:50:59,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:50:59,082 INFO L82 PathProgramCache]: Analyzing trace with hash -380855925, now seen corresponding path program 25 times [2018-10-22 15:50:59,082 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:50:59,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:50:59,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:59,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:50:59,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:50:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:50:59,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:50:59,923 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:50:59,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:50:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:50:59,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:50:59,977 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:00,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:00,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-22 15:51:00,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:51:00,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:51:00,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:51:00,006 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 28 states. [2018-10-22 15:51:00,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:00,135 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-22 15:51:00,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 15:51:00,136 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 82 [2018-10-22 15:51:00,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:00,137 INFO L225 Difference]: With dead ends: 91 [2018-10-22 15:51:00,137 INFO L226 Difference]: Without dead ends: 87 [2018-10-22 15:51:00,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:51:00,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-22 15:51:00,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2018-10-22 15:51:00,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-22 15:51:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-22 15:51:00,140 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 82 [2018-10-22 15:51:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:00,141 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-22 15:51:00,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:51:00,141 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-22 15:51:00,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-22 15:51:00,141 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:00,142 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:00,142 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:00,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:00,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1423041779, now seen corresponding path program 26 times [2018-10-22 15:51:00,142 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:00,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:00,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:00,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:00,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:01,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:01,052 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:01,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:01,077 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:01,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:01,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:01,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:01,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-22 15:51:01,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:51:01,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:51:01,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:51:01,125 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 29 states. [2018-10-22 15:51:01,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:01,242 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-22 15:51:01,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:51:01,243 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2018-10-22 15:51:01,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:01,244 INFO L225 Difference]: With dead ends: 94 [2018-10-22 15:51:01,244 INFO L226 Difference]: Without dead ends: 90 [2018-10-22 15:51:01,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:51:01,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-22 15:51:01,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-10-22 15:51:01,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-22 15:51:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-22 15:51:01,248 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 85 [2018-10-22 15:51:01,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:01,248 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-22 15:51:01,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:51:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-22 15:51:01,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-22 15:51:01,249 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:01,249 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:01,250 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:01,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:01,250 INFO L82 PathProgramCache]: Analyzing trace with hash -863235509, now seen corresponding path program 27 times [2018-10-22 15:51:01,250 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:01,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:01,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:01,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:01,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:01,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:01,706 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:01,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:01,738 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-22 15:51:01,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:01,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:01,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:01,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-22 15:51:01,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-22 15:51:01,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-22 15:51:01,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:51:01,790 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 30 states. [2018-10-22 15:51:01,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:01,929 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-22 15:51:01,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 15:51:01,930 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 88 [2018-10-22 15:51:01,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:01,931 INFO L225 Difference]: With dead ends: 97 [2018-10-22 15:51:01,931 INFO L226 Difference]: Without dead ends: 93 [2018-10-22 15:51:01,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:51:01,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-22 15:51:01,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2018-10-22 15:51:01,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-22 15:51:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-22 15:51:01,936 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 88 [2018-10-22 15:51:01,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:01,936 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-22 15:51:01,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-22 15:51:01,936 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-22 15:51:01,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-22 15:51:01,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:01,937 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:01,937 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:01,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:01,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1032656307, now seen corresponding path program 28 times [2018-10-22 15:51:01,938 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:01,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:01,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:01,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:01,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:02,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:02,321 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:02,329 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:02,345 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:02,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:02,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:02,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:02,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-22 15:51:02,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:51:02,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:51:02,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:51:02,394 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 31 states. [2018-10-22 15:51:02,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:02,531 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-22 15:51:02,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 15:51:02,532 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2018-10-22 15:51:02,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:02,532 INFO L225 Difference]: With dead ends: 100 [2018-10-22 15:51:02,532 INFO L226 Difference]: Without dead ends: 96 [2018-10-22 15:51:02,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:51:02,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-22 15:51:02,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2018-10-22 15:51:02,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-22 15:51:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-22 15:51:02,537 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 91 [2018-10-22 15:51:02,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:02,537 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-22 15:51:02,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:51:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-22 15:51:02,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-22 15:51:02,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:02,538 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:02,539 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:02,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:02,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1661076725, now seen corresponding path program 29 times [2018-10-22 15:51:02,539 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:02,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:02,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:02,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:02,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:03,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:03,602 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:03,609 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:03,635 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-22 15:51:03,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:03,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:03,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:03,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-22 15:51:03,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-22 15:51:03,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-22 15:51:03,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:51:03,675 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 32 states. [2018-10-22 15:51:03,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:03,832 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-22 15:51:03,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 15:51:03,832 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 94 [2018-10-22 15:51:03,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:03,833 INFO L225 Difference]: With dead ends: 103 [2018-10-22 15:51:03,833 INFO L226 Difference]: Without dead ends: 99 [2018-10-22 15:51:03,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:51:03,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-22 15:51:03,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2018-10-22 15:51:03,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-22 15:51:03,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-22 15:51:03,836 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 94 [2018-10-22 15:51:03,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:03,837 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-22 15:51:03,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-22 15:51:03,837 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-22 15:51:03,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-22 15:51:03,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:03,838 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:03,839 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:03,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:03,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1171306099, now seen corresponding path program 30 times [2018-10-22 15:51:03,839 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:03,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:03,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:03,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:03,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:04,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:04,324 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:04,331 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:04,364 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-22 15:51:04,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:04,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:04,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:04,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-22 15:51:04,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:51:04,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:51:04,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:51:04,413 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 33 states. [2018-10-22 15:51:04,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:04,560 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-22 15:51:04,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-22 15:51:04,561 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2018-10-22 15:51:04,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:04,562 INFO L225 Difference]: With dead ends: 106 [2018-10-22 15:51:04,562 INFO L226 Difference]: Without dead ends: 102 [2018-10-22 15:51:04,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:51:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-22 15:51:04,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2018-10-22 15:51:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-22 15:51:04,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-22 15:51:04,567 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 97 [2018-10-22 15:51:04,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:04,568 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-22 15:51:04,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 15:51:04,568 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-22 15:51:04,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-22 15:51:04,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:04,569 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:04,569 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:04,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:04,570 INFO L82 PathProgramCache]: Analyzing trace with hash -418491445, now seen corresponding path program 31 times [2018-10-22 15:51:04,570 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:04,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:04,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:04,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:04,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:06,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:06,052 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:06,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:06,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:06,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:06,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-22 15:51:06,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-22 15:51:06,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-22 15:51:06,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:51:06,121 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 34 states. [2018-10-22 15:51:06,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:06,217 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-22 15:51:06,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-22 15:51:06,217 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 100 [2018-10-22 15:51:06,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:06,218 INFO L225 Difference]: With dead ends: 109 [2018-10-22 15:51:06,219 INFO L226 Difference]: Without dead ends: 105 [2018-10-22 15:51:06,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:51:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-22 15:51:06,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2018-10-22 15:51:06,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-22 15:51:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-22 15:51:06,223 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 100 [2018-10-22 15:51:06,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:06,223 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-22 15:51:06,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-22 15:51:06,224 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-22 15:51:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-22 15:51:06,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:06,224 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:06,225 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:06,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:06,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1636353843, now seen corresponding path program 32 times [2018-10-22 15:51:06,225 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:06,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:06,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:06,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:06,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:06,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:06,757 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:06,764 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:06,794 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:06,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:06,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:06,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:06,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-22 15:51:06,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:51:06,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:51:06,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:51:06,844 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 35 states. [2018-10-22 15:51:07,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:07,005 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-22 15:51:07,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 15:51:07,005 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2018-10-22 15:51:07,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:07,006 INFO L225 Difference]: With dead ends: 112 [2018-10-22 15:51:07,006 INFO L226 Difference]: Without dead ends: 108 [2018-10-22 15:51:07,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:51:07,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-22 15:51:07,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2018-10-22 15:51:07,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-22 15:51:07,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-22 15:51:07,010 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 103 [2018-10-22 15:51:07,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:07,010 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-22 15:51:07,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:51:07,010 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-22 15:51:07,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-22 15:51:07,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:07,011 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:07,011 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:07,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:07,011 INFO L82 PathProgramCache]: Analyzing trace with hash 908663947, now seen corresponding path program 33 times [2018-10-22 15:51:07,011 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:07,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:07,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:07,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:07,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:08,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:08,012 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:08,020 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:08,049 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-22 15:51:08,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:08,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:08,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:08,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-22 15:51:08,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-22 15:51:08,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-22 15:51:08,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:51:08,106 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 36 states. [2018-10-22 15:51:08,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:08,479 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-22 15:51:08,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-22 15:51:08,480 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 106 [2018-10-22 15:51:08,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:08,481 INFO L225 Difference]: With dead ends: 115 [2018-10-22 15:51:08,481 INFO L226 Difference]: Without dead ends: 111 [2018-10-22 15:51:08,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:51:08,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-22 15:51:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2018-10-22 15:51:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-22 15:51:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-22 15:51:08,484 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 106 [2018-10-22 15:51:08,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:08,484 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-22 15:51:08,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-22 15:51:08,485 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-22 15:51:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-22 15:51:08,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:08,485 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:08,485 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:08,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:08,486 INFO L82 PathProgramCache]: Analyzing trace with hash 475969549, now seen corresponding path program 34 times [2018-10-22 15:51:08,486 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:08,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:08,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:08,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:08,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:09,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:09,088 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:09,096 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:09,114 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:09,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:09,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:09,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:09,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-22 15:51:09,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:51:09,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:51:09,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:51:09,161 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 37 states. [2018-10-22 15:51:09,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:09,315 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-10-22 15:51:09,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-22 15:51:09,316 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2018-10-22 15:51:09,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:09,317 INFO L225 Difference]: With dead ends: 118 [2018-10-22 15:51:09,317 INFO L226 Difference]: Without dead ends: 114 [2018-10-22 15:51:09,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:51:09,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-22 15:51:09,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-10-22 15:51:09,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-22 15:51:09,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-22 15:51:09,321 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 109 [2018-10-22 15:51:09,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:09,322 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-22 15:51:09,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:51:09,322 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-22 15:51:09,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-22 15:51:09,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:09,322 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:09,323 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:09,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:09,323 INFO L82 PathProgramCache]: Analyzing trace with hash -725985973, now seen corresponding path program 35 times [2018-10-22 15:51:09,323 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:09,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:09,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:09,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:09,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:09,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:09,999 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:10,007 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:10,040 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-22 15:51:10,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:10,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:10,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:10,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-22 15:51:10,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-22 15:51:10,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-22 15:51:10,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:51:10,090 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 38 states. [2018-10-22 15:51:10,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:10,245 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-22 15:51:10,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-22 15:51:10,245 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 112 [2018-10-22 15:51:10,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:10,246 INFO L225 Difference]: With dead ends: 121 [2018-10-22 15:51:10,246 INFO L226 Difference]: Without dead ends: 117 [2018-10-22 15:51:10,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:51:10,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-22 15:51:10,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2018-10-22 15:51:10,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-22 15:51:10,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-22 15:51:10,249 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 112 [2018-10-22 15:51:10,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:10,250 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-22 15:51:10,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-22 15:51:10,250 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-22 15:51:10,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-22 15:51:10,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:10,251 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:10,251 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:10,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:10,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1040595123, now seen corresponding path program 36 times [2018-10-22 15:51:10,252 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:10,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:10,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:10,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:10,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:11,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:11,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:11,018 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:11,025 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:11,063 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-22 15:51:11,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:11,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:11,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:11,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-22 15:51:11,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-22 15:51:11,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-22 15:51:11,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:51:11,107 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 39 states. [2018-10-22 15:51:11,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:11,346 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-10-22 15:51:11,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-22 15:51:11,346 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2018-10-22 15:51:11,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:11,347 INFO L225 Difference]: With dead ends: 124 [2018-10-22 15:51:11,347 INFO L226 Difference]: Without dead ends: 120 [2018-10-22 15:51:11,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:51:11,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-22 15:51:11,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2018-10-22 15:51:11,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-22 15:51:11,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-22 15:51:11,351 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 115 [2018-10-22 15:51:11,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:11,352 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-22 15:51:11,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-22 15:51:11,352 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-22 15:51:11,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-22 15:51:11,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:11,353 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:11,353 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:11,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:11,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1943142901, now seen corresponding path program 37 times [2018-10-22 15:51:11,354 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:11,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:11,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:11,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:11,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:13,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:13,215 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:13,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:13,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:13,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:13,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-22 15:51:13,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:51:13,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:51:13,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:51:13,299 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 40 states. [2018-10-22 15:51:13,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:13,468 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-22 15:51:13,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-22 15:51:13,469 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 118 [2018-10-22 15:51:13,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:13,470 INFO L225 Difference]: With dead ends: 127 [2018-10-22 15:51:13,473 INFO L226 Difference]: Without dead ends: 123 [2018-10-22 15:51:13,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:51:13,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-22 15:51:13,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2018-10-22 15:51:13,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-22 15:51:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-22 15:51:13,476 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 118 [2018-10-22 15:51:13,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:13,477 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-22 15:51:13,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:51:13,477 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-22 15:51:13,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-22 15:51:13,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:13,478 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:13,478 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:13,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:13,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1046242957, now seen corresponding path program 38 times [2018-10-22 15:51:13,479 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:13,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:13,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:13,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:13,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:14,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:14,402 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:14,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:14,437 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:14,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:14,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:14,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:14,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-22 15:51:14,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:51:14,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:51:14,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:51:14,487 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 41 states. [2018-10-22 15:51:14,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:14,699 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-10-22 15:51:14,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-22 15:51:14,699 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 121 [2018-10-22 15:51:14,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:14,700 INFO L225 Difference]: With dead ends: 130 [2018-10-22 15:51:14,700 INFO L226 Difference]: Without dead ends: 126 [2018-10-22 15:51:14,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:51:14,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-22 15:51:14,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2018-10-22 15:51:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-22 15:51:14,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-22 15:51:14,705 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 121 [2018-10-22 15:51:14,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:14,705 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-22 15:51:14,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 15:51:14,705 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-22 15:51:14,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-22 15:51:14,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:14,706 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:14,706 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:14,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:14,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1693456075, now seen corresponding path program 39 times [2018-10-22 15:51:14,707 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:14,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:14,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:14,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:14,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:15,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:15,576 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:15,583 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:15,618 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-22 15:51:15,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:15,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:15,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:15,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-22 15:51:15,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-22 15:51:15,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-22 15:51:15,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:51:15,677 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 42 states. [2018-10-22 15:51:16,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:16,807 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-22 15:51:16,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-22 15:51:16,808 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 124 [2018-10-22 15:51:16,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:16,809 INFO L225 Difference]: With dead ends: 133 [2018-10-22 15:51:16,809 INFO L226 Difference]: Without dead ends: 129 [2018-10-22 15:51:16,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:51:16,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-22 15:51:16,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2018-10-22 15:51:16,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-22 15:51:16,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-22 15:51:16,814 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 124 [2018-10-22 15:51:16,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:16,814 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-22 15:51:16,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-22 15:51:16,814 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-22 15:51:16,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-22 15:51:16,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:16,815 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:16,815 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:16,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:16,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1583704627, now seen corresponding path program 40 times [2018-10-22 15:51:16,816 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:16,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:16,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:16,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:16,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:18,541 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:18,541 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:18,548 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:18,582 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:18,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:18,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:18,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:18,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-22 15:51:18,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-22 15:51:18,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-22 15:51:18,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:51:18,629 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 43 states. [2018-10-22 15:51:18,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:18,867 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-10-22 15:51:18,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-22 15:51:18,868 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2018-10-22 15:51:18,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:18,869 INFO L225 Difference]: With dead ends: 136 [2018-10-22 15:51:18,869 INFO L226 Difference]: Without dead ends: 132 [2018-10-22 15:51:18,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:51:18,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-22 15:51:18,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2018-10-22 15:51:18,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-22 15:51:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-22 15:51:18,876 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 127 [2018-10-22 15:51:18,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:18,876 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-22 15:51:18,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-22 15:51:18,876 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-22 15:51:18,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-22 15:51:18,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:18,877 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:18,877 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:18,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:18,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1718394763, now seen corresponding path program 41 times [2018-10-22 15:51:18,878 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:18,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:18,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:18,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:18,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:19,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:19,626 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:19,633 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:19,672 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-22 15:51:19,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:19,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:19,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:19,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-22 15:51:19,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-22 15:51:19,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-22 15:51:19,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:51:19,729 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 44 states. [2018-10-22 15:51:19,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:19,868 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-22 15:51:19,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-22 15:51:19,869 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 130 [2018-10-22 15:51:19,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:19,870 INFO L225 Difference]: With dead ends: 139 [2018-10-22 15:51:19,870 INFO L226 Difference]: Without dead ends: 135 [2018-10-22 15:51:19,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:51:19,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-22 15:51:19,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2018-10-22 15:51:19,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-22 15:51:19,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-22 15:51:19,875 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 130 [2018-10-22 15:51:19,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:19,876 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-22 15:51:19,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-22 15:51:19,876 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-22 15:51:19,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-22 15:51:19,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:19,877 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:19,877 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:19,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:19,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1664592627, now seen corresponding path program 42 times [2018-10-22 15:51:19,878 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:19,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:19,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:19,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:19,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:21,176 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:21,176 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:21,184 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:21,220 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-22 15:51:21,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:21,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:21,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:21,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-22 15:51:21,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-22 15:51:21,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-22 15:51:21,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:51:21,268 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 45 states. [2018-10-22 15:51:21,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:21,432 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-10-22 15:51:21,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-22 15:51:21,432 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2018-10-22 15:51:21,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:21,434 INFO L225 Difference]: With dead ends: 142 [2018-10-22 15:51:21,434 INFO L226 Difference]: Without dead ends: 138 [2018-10-22 15:51:21,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:51:21,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-22 15:51:21,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-10-22 15:51:21,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-22 15:51:21,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-22 15:51:21,439 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 133 [2018-10-22 15:51:21,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:21,440 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-22 15:51:21,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-22 15:51:21,440 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-22 15:51:21,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-22 15:51:21,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:21,441 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:21,441 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:21,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:21,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1460639819, now seen corresponding path program 43 times [2018-10-22 15:51:21,441 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:21,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:21,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:21,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:21,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:22,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:22,316 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:22,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:22,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:22,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:22,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-22 15:51:22,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-22 15:51:22,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-22 15:51:22,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:51:22,396 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 46 states. [2018-10-22 15:51:23,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:23,379 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-22 15:51:23,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-22 15:51:23,379 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 136 [2018-10-22 15:51:23,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:23,380 INFO L225 Difference]: With dead ends: 145 [2018-10-22 15:51:23,380 INFO L226 Difference]: Without dead ends: 141 [2018-10-22 15:51:23,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:51:23,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-22 15:51:23,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2018-10-22 15:51:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-22 15:51:23,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-22 15:51:23,385 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 136 [2018-10-22 15:51:23,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:23,385 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-22 15:51:23,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-22 15:51:23,385 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-22 15:51:23,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-22 15:51:23,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:23,386 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:23,386 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:23,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:23,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1040604083, now seen corresponding path program 44 times [2018-10-22 15:51:23,387 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:23,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:23,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:23,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:23,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:24,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:24,913 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:24,927 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:24,953 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:24,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:24,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:25,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:25,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-22 15:51:25,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-22 15:51:25,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-22 15:51:25,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:51:25,018 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 47 states. [2018-10-22 15:51:25,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:25,177 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-10-22 15:51:25,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-22 15:51:25,177 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 139 [2018-10-22 15:51:25,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:25,178 INFO L225 Difference]: With dead ends: 148 [2018-10-22 15:51:25,178 INFO L226 Difference]: Without dead ends: 144 [2018-10-22 15:51:25,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:51:25,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-22 15:51:25,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2018-10-22 15:51:25,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-22 15:51:25,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-22 15:51:25,181 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 139 [2018-10-22 15:51:25,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:25,181 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-22 15:51:25,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-22 15:51:25,181 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-22 15:51:25,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-22 15:51:25,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:25,182 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:25,182 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:25,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:25,182 INFO L82 PathProgramCache]: Analyzing trace with hash 2084897035, now seen corresponding path program 45 times [2018-10-22 15:51:25,182 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:25,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:25,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:25,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:25,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:26,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:26,307 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:26,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:26,356 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-22 15:51:26,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:26,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:26,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:26,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-22 15:51:26,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-22 15:51:26,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-22 15:51:26,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:51:26,420 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 48 states. [2018-10-22 15:51:26,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:26,733 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-22 15:51:26,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-22 15:51:26,733 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 142 [2018-10-22 15:51:26,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:26,734 INFO L225 Difference]: With dead ends: 151 [2018-10-22 15:51:26,735 INFO L226 Difference]: Without dead ends: 147 [2018-10-22 15:51:26,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:51:26,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-22 15:51:26,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2018-10-22 15:51:26,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-22 15:51:26,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-22 15:51:26,738 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 142 [2018-10-22 15:51:26,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:26,739 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-22 15:51:26,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-22 15:51:26,739 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-22 15:51:26,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-22 15:51:26,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:26,739 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:26,740 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:26,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:26,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1002273907, now seen corresponding path program 46 times [2018-10-22 15:51:26,740 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:26,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:26,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:26,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:26,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:27,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:27,751 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:27,762 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:27,786 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:27,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:27,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:27,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:27,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-22 15:51:27,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-22 15:51:27,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-22 15:51:27,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:51:27,853 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 49 states. [2018-10-22 15:51:28,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:28,080 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-10-22 15:51:28,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-22 15:51:28,080 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 145 [2018-10-22 15:51:28,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:28,081 INFO L225 Difference]: With dead ends: 154 [2018-10-22 15:51:28,081 INFO L226 Difference]: Without dead ends: 150 [2018-10-22 15:51:28,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:51:28,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-22 15:51:28,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2018-10-22 15:51:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-22 15:51:28,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-22 15:51:28,085 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 145 [2018-10-22 15:51:28,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:28,085 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-22 15:51:28,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-22 15:51:28,086 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-22 15:51:28,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-22 15:51:28,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:28,087 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:28,087 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:28,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:28,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1517869515, now seen corresponding path program 47 times [2018-10-22 15:51:28,087 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:28,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:28,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:28,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:28,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:29,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:29,266 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:29,275 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:29,381 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-22 15:51:29,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:29,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:29,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:29,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-22 15:51:29,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-22 15:51:29,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-22 15:51:29,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:51:29,468 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 50 states. [2018-10-22 15:51:30,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:30,881 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-22 15:51:30,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-22 15:51:30,882 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 148 [2018-10-22 15:51:30,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:30,882 INFO L225 Difference]: With dead ends: 157 [2018-10-22 15:51:30,883 INFO L226 Difference]: Without dead ends: 153 [2018-10-22 15:51:30,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:51:30,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-22 15:51:30,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2018-10-22 15:51:30,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-22 15:51:30,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-22 15:51:30,887 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 148 [2018-10-22 15:51:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:30,887 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-22 15:51:30,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-22 15:51:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-22 15:51:30,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-22 15:51:30,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:30,888 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:30,888 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:30,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:30,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1212747059, now seen corresponding path program 48 times [2018-10-22 15:51:30,889 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:30,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:30,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:30,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:30,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:32,135 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:32,135 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:32,142 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:32,187 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-22 15:51:32,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:32,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:32,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:32,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-22 15:51:32,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-22 15:51:32,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-22 15:51:32,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 15:51:32,239 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 51 states. [2018-10-22 15:51:32,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:32,439 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-10-22 15:51:32,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-22 15:51:32,439 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 151 [2018-10-22 15:51:32,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:32,441 INFO L225 Difference]: With dead ends: 160 [2018-10-22 15:51:32,441 INFO L226 Difference]: Without dead ends: 156 [2018-10-22 15:51:32,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 15:51:32,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-22 15:51:32,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2018-10-22 15:51:32,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-22 15:51:32,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-22 15:51:32,445 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 151 [2018-10-22 15:51:32,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:32,445 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-22 15:51:32,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-22 15:51:32,445 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-22 15:51:32,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-22 15:51:32,446 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:32,446 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:32,446 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:32,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:32,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1964450443, now seen corresponding path program 49 times [2018-10-22 15:51:32,447 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:32,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:32,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:32,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:32,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:34,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:34,683 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:34,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:34,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:34,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:34,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-22 15:51:34,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-22 15:51:34,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-22 15:51:34,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:51:34,766 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 52 states. [2018-10-22 15:51:34,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:34,979 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-22 15:51:34,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-22 15:51:34,980 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 154 [2018-10-22 15:51:34,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:34,981 INFO L225 Difference]: With dead ends: 163 [2018-10-22 15:51:34,981 INFO L226 Difference]: Without dead ends: 159 [2018-10-22 15:51:34,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-22 15:51:34,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-22 15:51:34,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2018-10-22 15:51:34,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-22 15:51:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-22 15:51:34,984 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 154 [2018-10-22 15:51:34,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:34,985 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-22 15:51:34,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-22 15:51:34,985 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-22 15:51:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-22 15:51:34,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:34,986 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:34,986 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:34,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:34,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1365963277, now seen corresponding path program 50 times [2018-10-22 15:51:34,986 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:34,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:34,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:34,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:34,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:36,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:36,049 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:36,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:36,085 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:36,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:36,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:36,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:36,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-22 15:51:36,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-22 15:51:36,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-22 15:51:36,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-22 15:51:36,160 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 53 states. [2018-10-22 15:51:36,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:36,446 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-10-22 15:51:36,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-22 15:51:36,447 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 157 [2018-10-22 15:51:36,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:36,448 INFO L225 Difference]: With dead ends: 166 [2018-10-22 15:51:36,448 INFO L226 Difference]: Without dead ends: 162 [2018-10-22 15:51:36,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-22 15:51:36,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-22 15:51:36,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-10-22 15:51:36,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-22 15:51:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-10-22 15:51:36,451 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 157 [2018-10-22 15:51:36,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:36,451 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-10-22 15:51:36,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-22 15:51:36,451 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-10-22 15:51:36,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-22 15:51:36,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:36,452 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 51, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:36,452 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:36,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:36,453 INFO L82 PathProgramCache]: Analyzing trace with hash 244046667, now seen corresponding path program 51 times [2018-10-22 15:51:36,453 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:36,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:36,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:36,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:36,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:37,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:37,697 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:37,707 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:37,759 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-22 15:51:37,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:37,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:37,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:37,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-22 15:51:37,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-22 15:51:37,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-22 15:51:37,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-22 15:51:37,835 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 54 states. [2018-10-22 15:51:38,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:38,222 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-22 15:51:38,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-22 15:51:38,223 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 160 [2018-10-22 15:51:38,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:38,224 INFO L225 Difference]: With dead ends: 169 [2018-10-22 15:51:38,224 INFO L226 Difference]: Without dead ends: 165 [2018-10-22 15:51:38,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-22 15:51:38,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-22 15:51:38,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2018-10-22 15:51:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-22 15:51:38,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-10-22 15:51:38,228 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 160 [2018-10-22 15:51:38,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:38,228 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-10-22 15:51:38,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-22 15:51:38,229 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-10-22 15:51:38,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-22 15:51:38,229 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:38,229 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 52, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:38,229 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:38,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:38,230 INFO L82 PathProgramCache]: Analyzing trace with hash 661815629, now seen corresponding path program 52 times [2018-10-22 15:51:38,230 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:38,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:38,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:38,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:38,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:41,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:41,408 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:41,415 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:41,443 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:41,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:41,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:41,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:41,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-22 15:51:41,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-22 15:51:41,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-22 15:51:41,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-22 15:51:41,507 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 55 states. [2018-10-22 15:51:41,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:41,713 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-10-22 15:51:41,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-22 15:51:41,713 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2018-10-22 15:51:41,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:41,715 INFO L225 Difference]: With dead ends: 172 [2018-10-22 15:51:41,715 INFO L226 Difference]: Without dead ends: 168 [2018-10-22 15:51:41,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-22 15:51:41,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-22 15:51:41,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2018-10-22 15:51:41,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-22 15:51:41,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-22 15:51:41,718 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 163 [2018-10-22 15:51:41,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:41,719 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-22 15:51:41,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-22 15:51:41,719 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-22 15:51:41,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-22 15:51:41,720 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:41,720 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 53, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:41,720 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:41,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:41,720 INFO L82 PathProgramCache]: Analyzing trace with hash -398261237, now seen corresponding path program 53 times [2018-10-22 15:51:41,721 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:41,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:41,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:41,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:41,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:42,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:42,919 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:42,926 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:42,972 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-22 15:51:42,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:42,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:43,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:43,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-22 15:51:43,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-22 15:51:43,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-22 15:51:43,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-22 15:51:43,071 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 56 states. [2018-10-22 15:51:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:43,314 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-10-22 15:51:43,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-22 15:51:43,315 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 166 [2018-10-22 15:51:43,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:43,316 INFO L225 Difference]: With dead ends: 175 [2018-10-22 15:51:43,316 INFO L226 Difference]: Without dead ends: 171 [2018-10-22 15:51:43,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-22 15:51:43,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-22 15:51:43,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2018-10-22 15:51:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-10-22 15:51:43,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-10-22 15:51:43,321 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 166 [2018-10-22 15:51:43,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:43,322 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-10-22 15:51:43,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-22 15:51:43,322 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-10-22 15:51:43,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-10-22 15:51:43,323 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:43,323 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 54, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:43,323 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:43,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:43,323 INFO L82 PathProgramCache]: Analyzing trace with hash -253648755, now seen corresponding path program 54 times [2018-10-22 15:51:43,323 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:43,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:43,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:43,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:43,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:44,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:44,794 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:44,802 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:44,853 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-22 15:51:44,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:44,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:44,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:44,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-22 15:51:44,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-22 15:51:44,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-22 15:51:44,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-22 15:51:44,927 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 57 states. [2018-10-22 15:51:45,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:45,915 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-10-22 15:51:45,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-22 15:51:45,915 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 169 [2018-10-22 15:51:45,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:45,916 INFO L225 Difference]: With dead ends: 178 [2018-10-22 15:51:45,916 INFO L226 Difference]: Without dead ends: 174 [2018-10-22 15:51:45,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-22 15:51:45,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-22 15:51:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2018-10-22 15:51:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-22 15:51:45,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-22 15:51:45,920 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 169 [2018-10-22 15:51:45,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:45,921 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-22 15:51:45,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-22 15:51:45,921 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-22 15:51:45,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-22 15:51:45,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:45,922 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 55, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:45,922 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:45,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:45,923 INFO L82 PathProgramCache]: Analyzing trace with hash 44604619, now seen corresponding path program 55 times [2018-10-22 15:51:45,923 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:45,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:45,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:45,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:45,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:49,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:49,831 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:49,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:49,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:49,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:49,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-22 15:51:49,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-22 15:51:49,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-22 15:51:49,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-22 15:51:49,933 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 58 states. [2018-10-22 15:51:50,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:50,188 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-22 15:51:50,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-22 15:51:50,188 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 172 [2018-10-22 15:51:50,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:50,189 INFO L225 Difference]: With dead ends: 181 [2018-10-22 15:51:50,189 INFO L226 Difference]: Without dead ends: 177 [2018-10-22 15:51:50,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-22 15:51:50,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-22 15:51:50,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2018-10-22 15:51:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-22 15:51:50,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-10-22 15:51:50,192 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 172 [2018-10-22 15:51:50,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:50,192 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-10-22 15:51:50,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-22 15:51:50,192 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-10-22 15:51:50,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-22 15:51:50,193 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:50,193 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 56, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:50,193 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:50,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:50,194 INFO L82 PathProgramCache]: Analyzing trace with hash -976465971, now seen corresponding path program 56 times [2018-10-22 15:51:50,194 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:50,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:50,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:50,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:51:50,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:51,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:51,473 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:51,481 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:51:51,512 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:51:51,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:51,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:51,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:51,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-22 15:51:51,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-22 15:51:51,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-22 15:51:51,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-22 15:51:51,587 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 59 states. [2018-10-22 15:51:51,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:51,977 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2018-10-22 15:51:51,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-22 15:51:51,977 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 175 [2018-10-22 15:51:51,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:51,978 INFO L225 Difference]: With dead ends: 184 [2018-10-22 15:51:51,979 INFO L226 Difference]: Without dead ends: 180 [2018-10-22 15:51:51,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-22 15:51:51,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-22 15:51:51,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2018-10-22 15:51:51,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-22 15:51:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-22 15:51:51,983 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 175 [2018-10-22 15:51:51,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:51,983 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-22 15:51:51,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-22 15:51:51,983 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-22 15:51:51,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-22 15:51:51,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:51,984 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 57, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:51,984 INFO L424 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:51,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:51,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1562944907, now seen corresponding path program 57 times [2018-10-22 15:51:51,985 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:51,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:51,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:51,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:51,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:53,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:53,328 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:53,336 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:51:53,546 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-22 15:51:53,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:53,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:53,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:53,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-22 15:51:53,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-22 15:51:53,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-22 15:51:53,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-22 15:51:53,627 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 60 states. [2018-10-22 15:51:54,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:54,039 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-22 15:51:54,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-22 15:51:54,039 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 178 [2018-10-22 15:51:54,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:54,041 INFO L225 Difference]: With dead ends: 187 [2018-10-22 15:51:54,041 INFO L226 Difference]: Without dead ends: 183 [2018-10-22 15:51:54,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-22 15:51:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-22 15:51:54,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2018-10-22 15:51:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-22 15:51:54,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-10-22 15:51:54,047 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 178 [2018-10-22 15:51:54,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:54,047 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-10-22 15:51:54,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-22 15:51:54,048 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-10-22 15:51:54,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-22 15:51:54,049 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:54,049 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 58, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:54,049 INFO L424 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:54,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:54,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1598459661, now seen corresponding path program 58 times [2018-10-22 15:51:54,049 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:54,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:54,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:54,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:54,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:55,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:55,396 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:55,406 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:51:55,441 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:51:55,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:55,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:55,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:55,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-22 15:51:55,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-22 15:51:55,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-22 15:51:55,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-22 15:51:55,516 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 61 states. [2018-10-22 15:51:55,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:55,775 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2018-10-22 15:51:55,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-22 15:51:55,776 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 181 [2018-10-22 15:51:55,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:55,777 INFO L225 Difference]: With dead ends: 190 [2018-10-22 15:51:55,777 INFO L226 Difference]: Without dead ends: 186 [2018-10-22 15:51:55,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-22 15:51:55,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-22 15:51:55,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2018-10-22 15:51:55,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-22 15:51:55,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-10-22 15:51:55,781 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 181 [2018-10-22 15:51:55,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:55,782 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-10-22 15:51:55,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-22 15:51:55,782 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-10-22 15:51:55,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-22 15:51:55,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:55,783 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 59, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:55,783 INFO L424 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:55,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:55,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1238426037, now seen corresponding path program 59 times [2018-10-22 15:51:55,783 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:55,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:55,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:55,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:55,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:57,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:57,247 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:57,254 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:51:57,325 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-22 15:51:57,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:57,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:57,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:57,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-22 15:51:57,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-22 15:51:57,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-22 15:51:57,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-22 15:51:57,402 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 62 states. [2018-10-22 15:51:57,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:57,912 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-22 15:51:57,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-22 15:51:57,912 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 184 [2018-10-22 15:51:57,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:57,914 INFO L225 Difference]: With dead ends: 193 [2018-10-22 15:51:57,914 INFO L226 Difference]: Without dead ends: 189 [2018-10-22 15:51:57,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-22 15:51:57,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-22 15:51:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2018-10-22 15:51:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-10-22 15:51:57,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-10-22 15:51:57,918 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 184 [2018-10-22 15:51:57,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:57,918 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-10-22 15:51:57,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-22 15:51:57,918 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-10-22 15:51:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-22 15:51:57,919 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:57,919 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 60, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:57,919 INFO L424 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:57,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:57,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1466195533, now seen corresponding path program 60 times [2018-10-22 15:51:57,920 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:57,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:57,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:57,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:57,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:51:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:59,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:51:59,620 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:51:59,628 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:51:59,687 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-22 15:51:59,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:51:59,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:51:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:51:59,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:51:59,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-22 15:51:59,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-22 15:51:59,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-22 15:51:59,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-22 15:51:59,750 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 63 states. [2018-10-22 15:51:59,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:51:59,964 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2018-10-22 15:51:59,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-22 15:51:59,964 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 187 [2018-10-22 15:51:59,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:51:59,966 INFO L225 Difference]: With dead ends: 196 [2018-10-22 15:51:59,966 INFO L226 Difference]: Without dead ends: 192 [2018-10-22 15:51:59,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-22 15:51:59,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-10-22 15:51:59,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2018-10-22 15:51:59,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-22 15:51:59,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-10-22 15:51:59,970 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 187 [2018-10-22 15:51:59,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:51:59,971 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-10-22 15:51:59,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-22 15:51:59,971 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-10-22 15:51:59,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-22 15:51:59,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:51:59,972 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 61, 1, 1, 1, 1, 1, 1] [2018-10-22 15:51:59,972 INFO L424 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:51:59,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:51:59,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1260914443, now seen corresponding path program 61 times [2018-10-22 15:51:59,973 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:51:59,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:51:59,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:59,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:51:59,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:51:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:01,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:01,464 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:01,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:01,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:01,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:01,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-22 15:52:01,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-22 15:52:01,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-22 15:52:01,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-22 15:52:01,561 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 64 states. [2018-10-22 15:52:01,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:01,851 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-10-22 15:52:01,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-22 15:52:01,852 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 190 [2018-10-22 15:52:01,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:01,853 INFO L225 Difference]: With dead ends: 199 [2018-10-22 15:52:01,853 INFO L226 Difference]: Without dead ends: 195 [2018-10-22 15:52:01,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-22 15:52:01,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-22 15:52:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2018-10-22 15:52:01,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-22 15:52:01,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2018-10-22 15:52:01,856 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 190 [2018-10-22 15:52:01,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:01,856 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2018-10-22 15:52:01,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-22 15:52:01,856 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2018-10-22 15:52:01,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-22 15:52:01,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:01,857 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 62, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:01,857 INFO L424 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:01,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:01,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1765391757, now seen corresponding path program 62 times [2018-10-22 15:52:01,857 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:01,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:01,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:01,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:01,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:03,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:03,314 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:03,322 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:52:03,356 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:52:03,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:03,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:03,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:03,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-22 15:52:03,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-22 15:52:03,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-22 15:52:03,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-22 15:52:03,419 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 65 states. [2018-10-22 15:52:03,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:03,724 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2018-10-22 15:52:03,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-22 15:52:03,724 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 193 [2018-10-22 15:52:03,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:03,726 INFO L225 Difference]: With dead ends: 202 [2018-10-22 15:52:03,726 INFO L226 Difference]: Without dead ends: 198 [2018-10-22 15:52:03,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-22 15:52:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-10-22 15:52:03,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2018-10-22 15:52:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-22 15:52:03,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-10-22 15:52:03,730 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 193 [2018-10-22 15:52:03,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:03,730 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-10-22 15:52:03,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-22 15:52:03,730 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-10-22 15:52:03,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-22 15:52:03,731 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:03,732 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 63, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:03,732 INFO L424 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:03,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:03,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1736482869, now seen corresponding path program 63 times [2018-10-22 15:52:03,732 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:03,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:03,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:03,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:03,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:05,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:05,544 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:05,557 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:52:05,627 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-22 15:52:05,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:05,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:05,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:05,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-22 15:52:05,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-22 15:52:05,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-22 15:52:05,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-22 15:52:05,686 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 66 states. [2018-10-22 15:52:05,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:05,921 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-10-22 15:52:05,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-22 15:52:05,921 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 196 [2018-10-22 15:52:05,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:05,922 INFO L225 Difference]: With dead ends: 205 [2018-10-22 15:52:05,923 INFO L226 Difference]: Without dead ends: 201 [2018-10-22 15:52:05,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-22 15:52:05,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-22 15:52:05,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2018-10-22 15:52:05,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-22 15:52:05,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2018-10-22 15:52:05,927 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 196 [2018-10-22 15:52:05,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:05,927 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2018-10-22 15:52:05,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-22 15:52:05,928 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2018-10-22 15:52:05,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-10-22 15:52:05,929 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:05,929 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 64, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:05,929 INFO L424 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:05,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:05,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1327846195, now seen corresponding path program 64 times [2018-10-22 15:52:05,929 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:05,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:05,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:05,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:05,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:07,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:07,494 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:07,502 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:52:07,552 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:52:07,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:07,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:07,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:07,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-22 15:52:07,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-22 15:52:07,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-22 15:52:07,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-22 15:52:07,613 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand 67 states. [2018-10-22 15:52:07,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:07,868 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2018-10-22 15:52:07,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-22 15:52:07,869 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 199 [2018-10-22 15:52:07,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:07,870 INFO L225 Difference]: With dead ends: 208 [2018-10-22 15:52:07,870 INFO L226 Difference]: Without dead ends: 204 [2018-10-22 15:52:07,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-22 15:52:07,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-22 15:52:07,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2018-10-22 15:52:07,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-22 15:52:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-10-22 15:52:07,874 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 199 [2018-10-22 15:52:07,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:07,874 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-10-22 15:52:07,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-22 15:52:07,874 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-10-22 15:52:07,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-22 15:52:07,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:07,875 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 65, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:07,875 INFO L424 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:07,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:07,876 INFO L82 PathProgramCache]: Analyzing trace with hash 429992075, now seen corresponding path program 65 times [2018-10-22 15:52:07,876 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:07,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:07,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:07,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:07,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:10,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:10,083 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:10,095 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:52:10,169 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-22 15:52:10,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:10,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:10,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:10,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-22 15:52:10,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-22 15:52:10,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-22 15:52:10,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-22 15:52:10,255 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 68 states. [2018-10-22 15:52:11,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:11,116 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-10-22 15:52:11,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-22 15:52:11,116 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 202 [2018-10-22 15:52:11,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:11,117 INFO L225 Difference]: With dead ends: 211 [2018-10-22 15:52:11,117 INFO L226 Difference]: Without dead ends: 207 [2018-10-22 15:52:11,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-22 15:52:11,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-22 15:52:11,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2018-10-22 15:52:11,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-10-22 15:52:11,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2018-10-22 15:52:11,120 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 202 [2018-10-22 15:52:11,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:11,120 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2018-10-22 15:52:11,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-22 15:52:11,120 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2018-10-22 15:52:11,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-10-22 15:52:11,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:11,121 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 66, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:11,121 INFO L424 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:11,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:11,122 INFO L82 PathProgramCache]: Analyzing trace with hash -346346483, now seen corresponding path program 66 times [2018-10-22 15:52:11,122 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:11,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:11,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:11,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:11,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:12,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:12,922 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:12,929 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:52:12,993 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-22 15:52:12,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:12,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:13,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:13,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-22 15:52:13,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-22 15:52:13,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-22 15:52:13,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-22 15:52:13,078 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand 69 states. [2018-10-22 15:52:13,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:13,334 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2018-10-22 15:52:13,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-22 15:52:13,334 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 205 [2018-10-22 15:52:13,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:13,335 INFO L225 Difference]: With dead ends: 214 [2018-10-22 15:52:13,335 INFO L226 Difference]: Without dead ends: 210 [2018-10-22 15:52:13,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-22 15:52:13,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-10-22 15:52:13,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2018-10-22 15:52:13,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-22 15:52:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-10-22 15:52:13,338 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 205 [2018-10-22 15:52:13,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:13,338 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-10-22 15:52:13,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-22 15:52:13,339 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-10-22 15:52:13,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-22 15:52:13,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:13,339 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 67, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:13,340 INFO L424 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:13,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:13,340 INFO L82 PathProgramCache]: Analyzing trace with hash 150561099, now seen corresponding path program 67 times [2018-10-22 15:52:13,340 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:13,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:13,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:13,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:13,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:15,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:15,314 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:15,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:15,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:15,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:15,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-22 15:52:15,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-22 15:52:15,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-22 15:52:15,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-22 15:52:15,419 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 70 states. [2018-10-22 15:52:15,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:15,772 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-10-22 15:52:15,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-22 15:52:15,772 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 208 [2018-10-22 15:52:15,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:15,773 INFO L225 Difference]: With dead ends: 217 [2018-10-22 15:52:15,773 INFO L226 Difference]: Without dead ends: 213 [2018-10-22 15:52:15,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-22 15:52:15,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-22 15:52:15,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2018-10-22 15:52:15,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-10-22 15:52:15,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2018-10-22 15:52:15,777 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 208 [2018-10-22 15:52:15,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:15,777 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2018-10-22 15:52:15,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-22 15:52:15,778 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2018-10-22 15:52:15,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-10-22 15:52:15,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:15,779 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 68, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:15,779 INFO L424 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:15,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:15,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1227932851, now seen corresponding path program 68 times [2018-10-22 15:52:15,779 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:15,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:15,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:15,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:15,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:17,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:17,557 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:17,564 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:52:17,600 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:52:17,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:17,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:17,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:17,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-22 15:52:17,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-22 15:52:17,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-22 15:52:17,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-22 15:52:17,661 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 71 states. [2018-10-22 15:52:18,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:18,008 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2018-10-22 15:52:18,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-22 15:52:18,009 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 211 [2018-10-22 15:52:18,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:18,010 INFO L225 Difference]: With dead ends: 220 [2018-10-22 15:52:18,010 INFO L226 Difference]: Without dead ends: 216 [2018-10-22 15:52:18,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-22 15:52:18,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-10-22 15:52:18,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2018-10-22 15:52:18,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-22 15:52:18,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-10-22 15:52:18,014 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 211 [2018-10-22 15:52:18,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:18,014 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-10-22 15:52:18,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-22 15:52:18,014 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-10-22 15:52:18,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-22 15:52:18,015 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:18,015 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 69, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:18,016 INFO L424 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:18,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:18,016 INFO L82 PathProgramCache]: Analyzing trace with hash 536087051, now seen corresponding path program 69 times [2018-10-22 15:52:18,016 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:18,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:18,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:18,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:18,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:20,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:20,083 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:20,090 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:52:20,173 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-22 15:52:20,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:20,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:20,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:20,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-22 15:52:20,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-22 15:52:20,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-22 15:52:20,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-22 15:52:20,262 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 72 states. [2018-10-22 15:52:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:20,727 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-10-22 15:52:20,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-22 15:52:20,727 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 214 [2018-10-22 15:52:20,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:20,728 INFO L225 Difference]: With dead ends: 223 [2018-10-22 15:52:20,729 INFO L226 Difference]: Without dead ends: 219 [2018-10-22 15:52:20,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-22 15:52:20,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-22 15:52:20,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2018-10-22 15:52:20,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-10-22 15:52:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-10-22 15:52:20,732 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 214 [2018-10-22 15:52:20,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:20,732 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-10-22 15:52:20,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-22 15:52:20,732 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-10-22 15:52:20,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-22 15:52:20,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:20,733 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 70, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:20,733 INFO L424 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:20,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:20,733 INFO L82 PathProgramCache]: Analyzing trace with hash -766846323, now seen corresponding path program 70 times [2018-10-22 15:52:20,733 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:20,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:20,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:20,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:20,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:22,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:22,594 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:22,601 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:52:22,638 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:52:22,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:22,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:22,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:22,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-22 15:52:22,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-22 15:52:22,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-22 15:52:22,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-22 15:52:22,746 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 73 states. [2018-10-22 15:52:23,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:23,157 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2018-10-22 15:52:23,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-22 15:52:23,157 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 217 [2018-10-22 15:52:23,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:23,158 INFO L225 Difference]: With dead ends: 226 [2018-10-22 15:52:23,158 INFO L226 Difference]: Without dead ends: 222 [2018-10-22 15:52:23,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-22 15:52:23,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-22 15:52:23,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2018-10-22 15:52:23,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-22 15:52:23,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-10-22 15:52:23,163 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 217 [2018-10-22 15:52:23,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:23,163 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-10-22 15:52:23,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-22 15:52:23,164 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-10-22 15:52:23,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-22 15:52:23,165 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:23,165 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 71, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:23,165 INFO L424 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:23,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:23,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1459430091, now seen corresponding path program 71 times [2018-10-22 15:52:23,166 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:23,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:23,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:23,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:23,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:25,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:25,449 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:25,459 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:52:25,528 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-22 15:52:25,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:25,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:25,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:25,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-22 15:52:25,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-22 15:52:25,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-22 15:52:25,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-22 15:52:25,617 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 74 states. [2018-10-22 15:52:25,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:25,885 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-10-22 15:52:25,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-22 15:52:25,885 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 220 [2018-10-22 15:52:25,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:25,886 INFO L225 Difference]: With dead ends: 229 [2018-10-22 15:52:25,887 INFO L226 Difference]: Without dead ends: 225 [2018-10-22 15:52:25,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-22 15:52:25,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-10-22 15:52:25,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2018-10-22 15:52:25,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-10-22 15:52:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 224 transitions. [2018-10-22 15:52:25,891 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 224 transitions. Word has length 220 [2018-10-22 15:52:25,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:25,891 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 224 transitions. [2018-10-22 15:52:25,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-22 15:52:25,891 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 224 transitions. [2018-10-22 15:52:25,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-22 15:52:25,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:25,892 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 72, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:25,892 INFO L424 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:25,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:25,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1575094733, now seen corresponding path program 72 times [2018-10-22 15:52:25,892 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:25,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:25,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:25,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:25,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:27,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:27,912 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:27,920 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:52:27,995 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-22 15:52:27,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:27,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:28,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:28,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-22 15:52:28,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-22 15:52:28,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-22 15:52:28,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-22 15:52:28,061 INFO L87 Difference]: Start difference. First operand 224 states and 224 transitions. Second operand 75 states. [2018-10-22 15:52:28,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:28,463 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2018-10-22 15:52:28,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-22 15:52:28,464 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 223 [2018-10-22 15:52:28,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:28,465 INFO L225 Difference]: With dead ends: 232 [2018-10-22 15:52:28,465 INFO L226 Difference]: Without dead ends: 228 [2018-10-22 15:52:28,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-22 15:52:28,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-22 15:52:28,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2018-10-22 15:52:28,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-22 15:52:28,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-10-22 15:52:28,469 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 223 [2018-10-22 15:52:28,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:28,470 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-10-22 15:52:28,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-22 15:52:28,470 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-10-22 15:52:28,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-22 15:52:28,471 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:28,471 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 73, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:28,471 INFO L424 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:28,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:28,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1518294133, now seen corresponding path program 73 times [2018-10-22 15:52:28,472 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:28,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:28,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:28,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:28,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:30,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:30,798 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:30,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:30,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:30,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:30,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-22 15:52:30,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-22 15:52:30,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-22 15:52:30,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-22 15:52:30,910 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 76 states. [2018-10-22 15:52:31,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:31,188 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-10-22 15:52:31,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-22 15:52:31,189 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 226 [2018-10-22 15:52:31,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:31,190 INFO L225 Difference]: With dead ends: 235 [2018-10-22 15:52:31,190 INFO L226 Difference]: Without dead ends: 231 [2018-10-22 15:52:31,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-22 15:52:31,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-22 15:52:31,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2018-10-22 15:52:31,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-10-22 15:52:31,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 230 transitions. [2018-10-22 15:52:31,195 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 230 transitions. Word has length 226 [2018-10-22 15:52:31,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:31,196 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 230 transitions. [2018-10-22 15:52:31,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-22 15:52:31,196 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 230 transitions. [2018-10-22 15:52:31,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-10-22 15:52:31,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:31,197 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 74, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:31,197 INFO L424 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:31,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:31,198 INFO L82 PathProgramCache]: Analyzing trace with hash 447269133, now seen corresponding path program 74 times [2018-10-22 15:52:31,198 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:31,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:31,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:31,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:31,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:33,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:33,245 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:33,252 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:52:33,291 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:52:33,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:33,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:33,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:33,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-22 15:52:33,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-22 15:52:33,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-22 15:52:33,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-22 15:52:33,380 INFO L87 Difference]: Start difference. First operand 230 states and 230 transitions. Second operand 77 states. [2018-10-22 15:52:33,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:33,796 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2018-10-22 15:52:33,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-22 15:52:33,796 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 229 [2018-10-22 15:52:33,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:33,797 INFO L225 Difference]: With dead ends: 238 [2018-10-22 15:52:33,797 INFO L226 Difference]: Without dead ends: 234 [2018-10-22 15:52:33,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-22 15:52:33,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-22 15:52:33,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2018-10-22 15:52:33,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-10-22 15:52:33,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-10-22 15:52:33,802 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 229 [2018-10-22 15:52:33,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:33,802 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-10-22 15:52:33,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-22 15:52:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-10-22 15:52:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-22 15:52:33,804 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:33,804 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 75, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:33,804 INFO L424 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:33,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:33,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1041587125, now seen corresponding path program 75 times [2018-10-22 15:52:33,805 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:33,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:33,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:33,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:33,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:36,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:36,306 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:36,314 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:52:36,396 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-22 15:52:36,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:36,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:36,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:36,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-22 15:52:36,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-22 15:52:36,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-22 15:52:36,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-22 15:52:36,469 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 78 states. [2018-10-22 15:52:36,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:36,908 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-10-22 15:52:36,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-22 15:52:36,909 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 232 [2018-10-22 15:52:36,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:36,910 INFO L225 Difference]: With dead ends: 241 [2018-10-22 15:52:36,910 INFO L226 Difference]: Without dead ends: 237 [2018-10-22 15:52:36,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-22 15:52:36,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-10-22 15:52:36,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2018-10-22 15:52:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-10-22 15:52:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2018-10-22 15:52:36,913 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 232 [2018-10-22 15:52:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:36,914 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2018-10-22 15:52:36,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-22 15:52:36,914 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2018-10-22 15:52:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-22 15:52:36,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:36,915 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 76, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:36,915 INFO L424 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:36,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:36,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1431103411, now seen corresponding path program 76 times [2018-10-22 15:52:36,915 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:36,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:36,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:36,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:36,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:39,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:39,031 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:39,039 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:52:39,078 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:52:39,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:39,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:39,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:39,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-22 15:52:39,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-22 15:52:39,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-22 15:52:39,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-22 15:52:39,151 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 79 states. [2018-10-22 15:52:39,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:39,593 INFO L93 Difference]: Finished difference Result 244 states and 244 transitions. [2018-10-22 15:52:39,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-22 15:52:39,593 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 235 [2018-10-22 15:52:39,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:39,594 INFO L225 Difference]: With dead ends: 244 [2018-10-22 15:52:39,594 INFO L226 Difference]: Without dead ends: 240 [2018-10-22 15:52:39,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-22 15:52:39,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-10-22 15:52:39,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2018-10-22 15:52:39,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-10-22 15:52:39,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-10-22 15:52:39,598 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 235 [2018-10-22 15:52:39,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:39,598 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-10-22 15:52:39,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-22 15:52:39,599 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-10-22 15:52:39,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-22 15:52:39,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:39,600 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 77, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:39,600 INFO L424 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:39,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:39,601 INFO L82 PathProgramCache]: Analyzing trace with hash -509145845, now seen corresponding path program 77 times [2018-10-22 15:52:39,601 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:39,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:39,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:39,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:39,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:42,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:42,210 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:42,216 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:52:42,294 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-22 15:52:42,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:42,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:42,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:42,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-22 15:52:42,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-22 15:52:42,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-22 15:52:42,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-22 15:52:42,362 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 80 states. [2018-10-22 15:52:42,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:42,822 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-10-22 15:52:42,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-22 15:52:42,823 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 238 [2018-10-22 15:52:42,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:42,824 INFO L225 Difference]: With dead ends: 247 [2018-10-22 15:52:42,824 INFO L226 Difference]: Without dead ends: 243 [2018-10-22 15:52:42,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-22 15:52:42,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-22 15:52:42,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2018-10-22 15:52:42,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-10-22 15:52:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2018-10-22 15:52:42,828 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 238 [2018-10-22 15:52:42,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:42,828 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2018-10-22 15:52:42,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-22 15:52:42,828 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2018-10-22 15:52:42,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-10-22 15:52:42,829 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:42,830 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 78, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:42,830 INFO L424 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:42,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:42,830 INFO L82 PathProgramCache]: Analyzing trace with hash -787155059, now seen corresponding path program 78 times [2018-10-22 15:52:42,830 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:42,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:42,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:42,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:42,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:45,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:45,306 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:45,323 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:52:45,404 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-22 15:52:45,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:45,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:45,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:45,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-22 15:52:45,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-22 15:52:45,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-22 15:52:45,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-22 15:52:45,477 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand 81 states. [2018-10-22 15:52:45,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:45,930 INFO L93 Difference]: Finished difference Result 250 states and 250 transitions. [2018-10-22 15:52:45,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-22 15:52:45,930 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 241 [2018-10-22 15:52:45,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:45,931 INFO L225 Difference]: With dead ends: 250 [2018-10-22 15:52:45,931 INFO L226 Difference]: Without dead ends: 246 [2018-10-22 15:52:45,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-22 15:52:45,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-22 15:52:45,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2018-10-22 15:52:45,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-10-22 15:52:45,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2018-10-22 15:52:45,936 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 241 [2018-10-22 15:52:45,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:45,936 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2018-10-22 15:52:45,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-22 15:52:45,936 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2018-10-22 15:52:45,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-10-22 15:52:45,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:45,938 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 79, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:45,938 INFO L424 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:45,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:45,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2032264651, now seen corresponding path program 79 times [2018-10-22 15:52:45,938 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:45,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:45,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:45,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:45,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:48,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:48,427 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:48,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:48,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:48,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:48,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-22 15:52:48,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-22 15:52:48,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-22 15:52:48,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-22 15:52:48,557 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand 82 states. [2018-10-22 15:52:48,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:48,846 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-10-22 15:52:48,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-22 15:52:48,846 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 244 [2018-10-22 15:52:48,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:48,848 INFO L225 Difference]: With dead ends: 253 [2018-10-22 15:52:48,848 INFO L226 Difference]: Without dead ends: 249 [2018-10-22 15:52:48,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-22 15:52:48,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-10-22 15:52:48,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2018-10-22 15:52:48,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-10-22 15:52:48,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2018-10-22 15:52:48,851 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 244 [2018-10-22 15:52:48,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:48,852 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2018-10-22 15:52:48,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-22 15:52:48,852 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2018-10-22 15:52:48,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-10-22 15:52:48,852 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:48,853 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 80, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:48,853 INFO L424 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:48,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:48,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1310562611, now seen corresponding path program 80 times [2018-10-22 15:52:48,853 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:48,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:48,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:48,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:52:48,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:51,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:51,607 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:51,614 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:52:51,657 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:52:51,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:51,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:51,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:51,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-22 15:52:51,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-22 15:52:51,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-22 15:52:51,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-22 15:52:51,736 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 83 states. [2018-10-22 15:52:52,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:52,230 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2018-10-22 15:52:52,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-22 15:52:52,231 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 247 [2018-10-22 15:52:52,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:52,232 INFO L225 Difference]: With dead ends: 256 [2018-10-22 15:52:52,232 INFO L226 Difference]: Without dead ends: 252 [2018-10-22 15:52:52,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-22 15:52:52,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-10-22 15:52:52,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2018-10-22 15:52:52,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-10-22 15:52:52,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-10-22 15:52:52,235 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 247 [2018-10-22 15:52:52,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:52,235 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-10-22 15:52:52,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-22 15:52:52,235 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-10-22 15:52:52,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-10-22 15:52:52,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:52,237 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 81, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:52,237 INFO L424 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:52,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:52,237 INFO L82 PathProgramCache]: Analyzing trace with hash -70832501, now seen corresponding path program 81 times [2018-10-22 15:52:52,238 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:52,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:52,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:52,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:52,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:54,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:54,714 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:54,721 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:52:54,826 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-22 15:52:54,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:54,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:54,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:54,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-22 15:52:54,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-22 15:52:54,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-22 15:52:54,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-22 15:52:54,903 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 84 states. [2018-10-22 15:52:55,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:55,402 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2018-10-22 15:52:55,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-22 15:52:55,403 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 250 [2018-10-22 15:52:55,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:55,404 INFO L225 Difference]: With dead ends: 259 [2018-10-22 15:52:55,404 INFO L226 Difference]: Without dead ends: 255 [2018-10-22 15:52:55,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-22 15:52:55,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-22 15:52:55,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2018-10-22 15:52:55,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-10-22 15:52:55,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 254 transitions. [2018-10-22 15:52:55,409 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 254 transitions. Word has length 250 [2018-10-22 15:52:55,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:55,409 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 254 transitions. [2018-10-22 15:52:55,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-22 15:52:55,409 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 254 transitions. [2018-10-22 15:52:55,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-22 15:52:55,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:55,411 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 82, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:55,411 INFO L424 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:55,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:55,411 INFO L82 PathProgramCache]: Analyzing trace with hash 305096205, now seen corresponding path program 82 times [2018-10-22 15:52:55,411 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:55,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:55,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:55,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:55,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:52:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:57,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:52:57,890 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:52:57,897 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:52:57,938 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:52:57,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:52:57,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:52:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:52:58,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:52:58,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-22 15:52:58,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-22 15:52:58,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-22 15:52:58,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-22 15:52:58,038 INFO L87 Difference]: Start difference. First operand 254 states and 254 transitions. Second operand 85 states. [2018-10-22 15:52:58,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:52:58,368 INFO L93 Difference]: Finished difference Result 262 states and 262 transitions. [2018-10-22 15:52:58,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-22 15:52:58,368 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 253 [2018-10-22 15:52:58,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:52:58,370 INFO L225 Difference]: With dead ends: 262 [2018-10-22 15:52:58,370 INFO L226 Difference]: Without dead ends: 258 [2018-10-22 15:52:58,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-22 15:52:58,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-10-22 15:52:58,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2018-10-22 15:52:58,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-10-22 15:52:58,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2018-10-22 15:52:58,375 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 253 [2018-10-22 15:52:58,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:52:58,375 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2018-10-22 15:52:58,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-22 15:52:58,375 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2018-10-22 15:52:58,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-10-22 15:52:58,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:52:58,376 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 83, 1, 1, 1, 1, 1, 1] [2018-10-22 15:52:58,376 INFO L424 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:52:58,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:52:58,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1677531317, now seen corresponding path program 83 times [2018-10-22 15:52:58,377 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:52:58,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:52:58,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:58,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:52:58,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:52:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:01,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:01,163 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:01,170 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:53:01,260 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-22 15:53:01,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:01,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:01,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:01,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-22 15:53:01,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-22 15:53:01,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-22 15:53:01,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-22 15:53:01,338 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 86 states. [2018-10-22 15:53:01,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:01,654 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-10-22 15:53:01,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-22 15:53:01,655 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 256 [2018-10-22 15:53:01,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:01,656 INFO L225 Difference]: With dead ends: 265 [2018-10-22 15:53:01,656 INFO L226 Difference]: Without dead ends: 261 [2018-10-22 15:53:01,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-22 15:53:01,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-10-22 15:53:01,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 260. [2018-10-22 15:53:01,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-10-22 15:53:01,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 260 transitions. [2018-10-22 15:53:01,661 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 260 transitions. Word has length 256 [2018-10-22 15:53:01,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:01,661 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 260 transitions. [2018-10-22 15:53:01,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-22 15:53:01,661 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 260 transitions. [2018-10-22 15:53:01,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-10-22 15:53:01,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:01,663 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 84, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:01,663 INFO L424 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:01,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:01,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1743784627, now seen corresponding path program 84 times [2018-10-22 15:53:01,663 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:01,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:01,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:01,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:01,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:04,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:04,290 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:04,297 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:53:04,388 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-22 15:53:04,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:04,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:04,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:04,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-22 15:53:04,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-22 15:53:04,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-22 15:53:04,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-22 15:53:04,477 INFO L87 Difference]: Start difference. First operand 260 states and 260 transitions. Second operand 87 states. [2018-10-22 15:53:04,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:04,795 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2018-10-22 15:53:04,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-22 15:53:04,795 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 259 [2018-10-22 15:53:04,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:04,797 INFO L225 Difference]: With dead ends: 268 [2018-10-22 15:53:04,797 INFO L226 Difference]: Without dead ends: 264 [2018-10-22 15:53:04,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-22 15:53:04,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-10-22 15:53:04,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2018-10-22 15:53:04,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-10-22 15:53:04,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-10-22 15:53:04,801 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 259 [2018-10-22 15:53:04,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:04,802 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-10-22 15:53:04,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-22 15:53:04,802 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-10-22 15:53:04,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-22 15:53:04,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:04,803 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 85, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:04,803 INFO L424 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:04,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:04,803 INFO L82 PathProgramCache]: Analyzing trace with hash 188813323, now seen corresponding path program 85 times [2018-10-22 15:53:04,803 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:04,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:04,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:04,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:04,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:07,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:07,690 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:07,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:53:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:07,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:07,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:07,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-22 15:53:07,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-22 15:53:07,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-22 15:53:07,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-22 15:53:07,831 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 88 states. [2018-10-22 15:53:08,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:08,269 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2018-10-22 15:53:08,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-22 15:53:08,270 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 262 [2018-10-22 15:53:08,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:08,271 INFO L225 Difference]: With dead ends: 271 [2018-10-22 15:53:08,271 INFO L226 Difference]: Without dead ends: 267 [2018-10-22 15:53:08,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-22 15:53:08,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-22 15:53:08,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2018-10-22 15:53:08,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-10-22 15:53:08,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 266 transitions. [2018-10-22 15:53:08,276 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 266 transitions. Word has length 262 [2018-10-22 15:53:08,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:08,276 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 266 transitions. [2018-10-22 15:53:08,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-22 15:53:08,277 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 266 transitions. [2018-10-22 15:53:08,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-10-22 15:53:08,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:08,278 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 86, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:08,278 INFO L424 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:08,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:08,279 INFO L82 PathProgramCache]: Analyzing trace with hash 177738893, now seen corresponding path program 86 times [2018-10-22 15:53:08,279 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:08,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:08,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:08,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:53:08,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:11,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:11,230 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:11,238 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:53:11,284 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:53:11,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:11,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:11,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:11,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-22 15:53:11,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-22 15:53:11,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-22 15:53:11,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-22 15:53:11,365 INFO L87 Difference]: Start difference. First operand 266 states and 266 transitions. Second operand 89 states. [2018-10-22 15:53:11,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:11,874 INFO L93 Difference]: Finished difference Result 274 states and 274 transitions. [2018-10-22 15:53:11,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-22 15:53:11,874 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 265 [2018-10-22 15:53:11,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:11,876 INFO L225 Difference]: With dead ends: 274 [2018-10-22 15:53:11,876 INFO L226 Difference]: Without dead ends: 270 [2018-10-22 15:53:11,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-22 15:53:11,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-10-22 15:53:11,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2018-10-22 15:53:11,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-10-22 15:53:11,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2018-10-22 15:53:11,879 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 265 [2018-10-22 15:53:11,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:11,879 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2018-10-22 15:53:11,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-22 15:53:11,879 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2018-10-22 15:53:11,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-10-22 15:53:11,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:11,880 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 87, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:11,880 INFO L424 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:11,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:11,881 INFO L82 PathProgramCache]: Analyzing trace with hash 971876555, now seen corresponding path program 87 times [2018-10-22 15:53:11,881 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:11,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:11,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:11,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:11,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:14,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:14,682 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:14,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:53:14,789 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-22 15:53:14,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:14,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:14,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:14,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-22 15:53:14,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-22 15:53:14,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-22 15:53:14,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-22 15:53:14,873 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand 90 states. [2018-10-22 15:53:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:15,235 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-10-22 15:53:15,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-22 15:53:15,236 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 268 [2018-10-22 15:53:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:15,237 INFO L225 Difference]: With dead ends: 277 [2018-10-22 15:53:15,237 INFO L226 Difference]: Without dead ends: 273 [2018-10-22 15:53:15,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-22 15:53:15,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-10-22 15:53:15,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2018-10-22 15:53:15,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2018-10-22 15:53:15,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 272 transitions. [2018-10-22 15:53:15,241 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 272 transitions. Word has length 268 [2018-10-22 15:53:15,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:15,241 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 272 transitions. [2018-10-22 15:53:15,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-22 15:53:15,241 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 272 transitions. [2018-10-22 15:53:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-10-22 15:53:15,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:15,243 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 88, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:15,243 INFO L424 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:15,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:15,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1847868467, now seen corresponding path program 88 times [2018-10-22 15:53:15,243 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:15,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:15,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:15,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:15,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:18,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:18,330 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:18,339 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:53:18,385 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:53:18,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:18,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:18,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:18,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-22 15:53:18,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-22 15:53:18,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-22 15:53:18,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-22 15:53:18,468 INFO L87 Difference]: Start difference. First operand 272 states and 272 transitions. Second operand 91 states. [2018-10-22 15:53:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:18,922 INFO L93 Difference]: Finished difference Result 280 states and 280 transitions. [2018-10-22 15:53:18,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-22 15:53:18,922 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 271 [2018-10-22 15:53:18,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:18,924 INFO L225 Difference]: With dead ends: 280 [2018-10-22 15:53:18,924 INFO L226 Difference]: Without dead ends: 276 [2018-10-22 15:53:18,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-22 15:53:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-10-22 15:53:18,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2018-10-22 15:53:18,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-10-22 15:53:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2018-10-22 15:53:18,928 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 271 [2018-10-22 15:53:18,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:18,929 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2018-10-22 15:53:18,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-22 15:53:18,929 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2018-10-22 15:53:18,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-10-22 15:53:18,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:18,930 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 89, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:18,930 INFO L424 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:18,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:18,930 INFO L82 PathProgramCache]: Analyzing trace with hash 393523595, now seen corresponding path program 89 times [2018-10-22 15:53:18,930 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:18,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:18,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:18,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:18,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:21,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:21,885 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:21,892 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:53:22,111 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-22 15:53:22,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:22,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:22,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:22,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-22 15:53:22,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-22 15:53:22,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-22 15:53:22,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-22 15:53:22,194 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 92 states. [2018-10-22 15:53:22,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:22,768 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2018-10-22 15:53:22,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-22 15:53:22,769 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 274 [2018-10-22 15:53:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:22,770 INFO L225 Difference]: With dead ends: 283 [2018-10-22 15:53:22,770 INFO L226 Difference]: Without dead ends: 279 [2018-10-22 15:53:22,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-22 15:53:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-22 15:53:22,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 278. [2018-10-22 15:53:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2018-10-22 15:53:22,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 278 transitions. [2018-10-22 15:53:22,773 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 278 transitions. Word has length 274 [2018-10-22 15:53:22,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:22,774 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 278 transitions. [2018-10-22 15:53:22,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-22 15:53:22,774 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 278 transitions. [2018-10-22 15:53:22,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-10-22 15:53:22,775 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:22,775 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 90, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:22,775 INFO L424 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:22,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:22,775 INFO L82 PathProgramCache]: Analyzing trace with hash -152108275, now seen corresponding path program 90 times [2018-10-22 15:53:22,775 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:22,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:22,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:22,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:22,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:25,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:25,687 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:25,695 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:53:25,797 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-22 15:53:25,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:25,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:25,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:25,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-22 15:53:25,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-22 15:53:25,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-22 15:53:25,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-22 15:53:25,884 INFO L87 Difference]: Start difference. First operand 278 states and 278 transitions. Second operand 93 states. [2018-10-22 15:53:26,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:26,476 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2018-10-22 15:53:26,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-22 15:53:26,477 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 277 [2018-10-22 15:53:26,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:26,478 INFO L225 Difference]: With dead ends: 286 [2018-10-22 15:53:26,478 INFO L226 Difference]: Without dead ends: 282 [2018-10-22 15:53:26,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-22 15:53:26,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-10-22 15:53:26,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2018-10-22 15:53:26,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-10-22 15:53:26,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2018-10-22 15:53:26,482 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 277 [2018-10-22 15:53:26,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:26,482 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2018-10-22 15:53:26,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-22 15:53:26,483 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2018-10-22 15:53:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-10-22 15:53:26,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:26,484 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 91, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:26,484 INFO L424 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:26,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:26,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1380067915, now seen corresponding path program 91 times [2018-10-22 15:53:26,484 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:26,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:26,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:26,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:26,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:29,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:29,515 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:29,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:53:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:29,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:29,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:29,662 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-22 15:53:29,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-22 15:53:29,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-22 15:53:29,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-22 15:53:29,663 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand 94 states. [2018-10-22 15:53:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:30,260 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2018-10-22 15:53:30,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-22 15:53:30,261 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 280 [2018-10-22 15:53:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:30,262 INFO L225 Difference]: With dead ends: 289 [2018-10-22 15:53:30,262 INFO L226 Difference]: Without dead ends: 285 [2018-10-22 15:53:30,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-22 15:53:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-10-22 15:53:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 284. [2018-10-22 15:53:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-10-22 15:53:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 284 transitions. [2018-10-22 15:53:30,265 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 284 transitions. Word has length 280 [2018-10-22 15:53:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:30,266 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 284 transitions. [2018-10-22 15:53:30,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-22 15:53:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 284 transitions. [2018-10-22 15:53:30,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-10-22 15:53:30,267 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:30,267 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 92, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:30,267 INFO L424 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:30,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:30,267 INFO L82 PathProgramCache]: Analyzing trace with hash -471477683, now seen corresponding path program 92 times [2018-10-22 15:53:30,267 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:30,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:30,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:30,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:53:30,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:34,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:34,125 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:34,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:53:34,180 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:53:34,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:34,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:34,265 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:34,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-22 15:53:34,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-22 15:53:34,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-22 15:53:34,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-22 15:53:34,267 INFO L87 Difference]: Start difference. First operand 284 states and 284 transitions. Second operand 95 states. [2018-10-22 15:53:34,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:34,758 INFO L93 Difference]: Finished difference Result 292 states and 292 transitions. [2018-10-22 15:53:34,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-22 15:53:34,759 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 283 [2018-10-22 15:53:34,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:34,760 INFO L225 Difference]: With dead ends: 292 [2018-10-22 15:53:34,761 INFO L226 Difference]: Without dead ends: 288 [2018-10-22 15:53:34,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-22 15:53:34,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-10-22 15:53:34,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2018-10-22 15:53:34,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-10-22 15:53:34,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2018-10-22 15:53:34,766 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 283 [2018-10-22 15:53:34,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:34,766 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2018-10-22 15:53:34,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-22 15:53:34,766 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2018-10-22 15:53:34,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-10-22 15:53:34,767 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:34,767 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 93, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:34,767 INFO L424 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:34,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:34,768 INFO L82 PathProgramCache]: Analyzing trace with hash 398594827, now seen corresponding path program 93 times [2018-10-22 15:53:34,768 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:34,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:34,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:34,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:34,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:37,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:37,949 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:37,957 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:53:38,074 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-22 15:53:38,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:38,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:38,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:38,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-22 15:53:38,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-22 15:53:38,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-22 15:53:38,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-22 15:53:38,162 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 96 states. [2018-10-22 15:53:38,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:38,560 INFO L93 Difference]: Finished difference Result 295 states and 295 transitions. [2018-10-22 15:53:38,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-22 15:53:38,560 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 286 [2018-10-22 15:53:38,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:38,561 INFO L225 Difference]: With dead ends: 295 [2018-10-22 15:53:38,561 INFO L226 Difference]: Without dead ends: 291 [2018-10-22 15:53:38,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-22 15:53:38,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-10-22 15:53:38,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 290. [2018-10-22 15:53:38,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-10-22 15:53:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 290 transitions. [2018-10-22 15:53:38,565 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 290 transitions. Word has length 286 [2018-10-22 15:53:38,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:38,565 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 290 transitions. [2018-10-22 15:53:38,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-22 15:53:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 290 transitions. [2018-10-22 15:53:38,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-10-22 15:53:38,566 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:38,566 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 94, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:38,566 INFO L424 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:38,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:38,566 INFO L82 PathProgramCache]: Analyzing trace with hash 601108877, now seen corresponding path program 94 times [2018-10-22 15:53:38,567 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:38,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:38,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:38,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:38,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:41,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:41,793 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:41,800 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:53:41,849 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:53:41,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:41,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:41,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:41,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-22 15:53:41,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-22 15:53:41,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-22 15:53:41,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-22 15:53:41,956 INFO L87 Difference]: Start difference. First operand 290 states and 290 transitions. Second operand 97 states. [2018-10-22 15:53:42,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:42,586 INFO L93 Difference]: Finished difference Result 298 states and 298 transitions. [2018-10-22 15:53:42,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-22 15:53:42,586 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 289 [2018-10-22 15:53:42,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:42,588 INFO L225 Difference]: With dead ends: 298 [2018-10-22 15:53:42,588 INFO L226 Difference]: Without dead ends: 294 [2018-10-22 15:53:42,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-22 15:53:42,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-10-22 15:53:42,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2018-10-22 15:53:42,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-10-22 15:53:42,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2018-10-22 15:53:42,591 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 289 [2018-10-22 15:53:42,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:42,592 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2018-10-22 15:53:42,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-22 15:53:42,592 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2018-10-22 15:53:42,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-10-22 15:53:42,593 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:42,593 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 95, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:42,593 INFO L424 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:42,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:42,593 INFO L82 PathProgramCache]: Analyzing trace with hash -731878453, now seen corresponding path program 95 times [2018-10-22 15:53:42,593 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:42,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:42,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:42,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:42,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:45,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:45,853 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:45,861 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:53:46,004 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-22 15:53:46,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:46,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:46,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:46,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-22 15:53:46,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-22 15:53:46,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-22 15:53:46,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-22 15:53:46,095 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 98 states. [2018-10-22 15:53:46,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:46,587 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2018-10-22 15:53:46,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-22 15:53:46,587 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 292 [2018-10-22 15:53:46,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:46,589 INFO L225 Difference]: With dead ends: 301 [2018-10-22 15:53:46,589 INFO L226 Difference]: Without dead ends: 297 [2018-10-22 15:53:46,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-22 15:53:46,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-10-22 15:53:46,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 296. [2018-10-22 15:53:46,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2018-10-22 15:53:46,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 296 transitions. [2018-10-22 15:53:46,594 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 296 transitions. Word has length 292 [2018-10-22 15:53:46,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:46,594 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 296 transitions. [2018-10-22 15:53:46,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-22 15:53:46,594 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 296 transitions. [2018-10-22 15:53:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-10-22 15:53:46,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:46,595 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 96, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:46,595 INFO L424 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:46,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:46,596 INFO L82 PathProgramCache]: Analyzing trace with hash -489807667, now seen corresponding path program 96 times [2018-10-22 15:53:46,596 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:46,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:46,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:46,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:46,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:49,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:49,955 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:49,962 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:53:50,069 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-10-22 15:53:50,069 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:50,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:50,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:50,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-22 15:53:50,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-22 15:53:50,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-22 15:53:50,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-22 15:53:50,162 INFO L87 Difference]: Start difference. First operand 296 states and 296 transitions. Second operand 99 states. [2018-10-22 15:53:50,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:50,595 INFO L93 Difference]: Finished difference Result 304 states and 304 transitions. [2018-10-22 15:53:50,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-22 15:53:50,595 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 295 [2018-10-22 15:53:50,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:50,597 INFO L225 Difference]: With dead ends: 304 [2018-10-22 15:53:50,597 INFO L226 Difference]: Without dead ends: 300 [2018-10-22 15:53:50,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-22 15:53:50,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2018-10-22 15:53:50,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2018-10-22 15:53:50,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-10-22 15:53:50,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2018-10-22 15:53:50,601 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 295 [2018-10-22 15:53:50,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:50,601 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2018-10-22 15:53:50,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-22 15:53:50,601 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2018-10-22 15:53:50,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-22 15:53:50,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:50,602 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 97, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:50,602 INFO L424 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:50,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:50,602 INFO L82 PathProgramCache]: Analyzing trace with hash -209111925, now seen corresponding path program 97 times [2018-10-22 15:53:50,602 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:50,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:50,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:50,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:50,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:54,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:54,035 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:54,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:53:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:54,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:54,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:54,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-22 15:53:54,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-22 15:53:54,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-22 15:53:54,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-22 15:53:54,182 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand 100 states. [2018-10-22 15:53:54,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:54,668 INFO L93 Difference]: Finished difference Result 307 states and 307 transitions. [2018-10-22 15:53:54,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-22 15:53:54,669 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 298 [2018-10-22 15:53:54,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:54,670 INFO L225 Difference]: With dead ends: 307 [2018-10-22 15:53:54,670 INFO L226 Difference]: Without dead ends: 303 [2018-10-22 15:53:54,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-22 15:53:54,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-22 15:53:54,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 302. [2018-10-22 15:53:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-10-22 15:53:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 302 transitions. [2018-10-22 15:53:54,674 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 302 transitions. Word has length 298 [2018-10-22 15:53:54,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:54,674 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 302 transitions. [2018-10-22 15:53:54,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-22 15:53:54,674 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 302 transitions. [2018-10-22 15:53:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2018-10-22 15:53:54,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:54,675 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 98, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:54,675 INFO L424 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:54,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:54,676 INFO L82 PathProgramCache]: Analyzing trace with hash -303587315, now seen corresponding path program 98 times [2018-10-22 15:53:54,676 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:54,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:54,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:54,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:53:54,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:53:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:58,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:53:58,172 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:53:58,181 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:53:58,231 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:53:58,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:53:58,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:53:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:53:58,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:53:58,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-22 15:53:58,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-22 15:53:58,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-22 15:53:58,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-22 15:53:58,326 INFO L87 Difference]: Start difference. First operand 302 states and 302 transitions. Second operand 101 states. [2018-10-22 15:53:58,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:53:58,799 INFO L93 Difference]: Finished difference Result 310 states and 310 transitions. [2018-10-22 15:53:58,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-22 15:53:58,800 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 301 [2018-10-22 15:53:58,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:53:58,801 INFO L225 Difference]: With dead ends: 310 [2018-10-22 15:53:58,801 INFO L226 Difference]: Without dead ends: 306 [2018-10-22 15:53:58,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-22 15:53:58,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2018-10-22 15:53:58,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2018-10-22 15:53:58,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-10-22 15:53:58,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 305 transitions. [2018-10-22 15:53:58,804 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 305 transitions. Word has length 301 [2018-10-22 15:53:58,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:53:58,805 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 305 transitions. [2018-10-22 15:53:58,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-22 15:53:58,805 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 305 transitions. [2018-10-22 15:53:58,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-10-22 15:53:58,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:53:58,806 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 99, 1, 1, 1, 1, 1, 1] [2018-10-22 15:53:58,806 INFO L424 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:53:58,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:53:58,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1616351925, now seen corresponding path program 99 times [2018-10-22 15:53:58,807 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:53:58,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:53:58,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:58,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:53:58,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:53:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:02,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:02,393 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:54:02,400 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:54:02,523 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-10-22 15:54:02,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:02,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:02,620 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:54:02,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-22 15:54:02,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-22 15:54:02,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-22 15:54:02,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-22 15:54:02,622 INFO L87 Difference]: Start difference. First operand 305 states and 305 transitions. Second operand 102 states. [2018-10-22 15:54:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:03,132 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2018-10-22 15:54:03,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-22 15:54:03,132 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 304 [2018-10-22 15:54:03,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:03,133 INFO L225 Difference]: With dead ends: 313 [2018-10-22 15:54:03,134 INFO L226 Difference]: Without dead ends: 309 [2018-10-22 15:54:03,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-22 15:54:03,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-10-22 15:54:03,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 308. [2018-10-22 15:54:03,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2018-10-22 15:54:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 308 transitions. [2018-10-22 15:54:03,138 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 308 transitions. Word has length 304 [2018-10-22 15:54:03,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:03,139 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 308 transitions. [2018-10-22 15:54:03,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-22 15:54:03,139 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 308 transitions. [2018-10-22 15:54:03,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-10-22 15:54:03,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:03,141 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 100, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:03,141 INFO L424 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:03,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:03,141 INFO L82 PathProgramCache]: Analyzing trace with hash -214651059, now seen corresponding path program 100 times [2018-10-22 15:54:03,141 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:03,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:03,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:03,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:03,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 15050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:06,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:06,851 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:54:06,859 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:54:06,910 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:54:06,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:06,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 15050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:07,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:54:07,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-22 15:54:07,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-22 15:54:07,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-22 15:54:07,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-22 15:54:07,008 INFO L87 Difference]: Start difference. First operand 308 states and 308 transitions. Second operand 103 states. [2018-10-22 15:54:07,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:07,765 INFO L93 Difference]: Finished difference Result 316 states and 316 transitions. [2018-10-22 15:54:07,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-22 15:54:07,765 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 307 [2018-10-22 15:54:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:07,766 INFO L225 Difference]: With dead ends: 316 [2018-10-22 15:54:07,767 INFO L226 Difference]: Without dead ends: 312 [2018-10-22 15:54:07,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-22 15:54:07,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-10-22 15:54:07,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 311. [2018-10-22 15:54:07,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-10-22 15:54:07,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2018-10-22 15:54:07,771 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 307 [2018-10-22 15:54:07,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:07,771 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2018-10-22 15:54:07,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-22 15:54:07,772 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2018-10-22 15:54:07,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-10-22 15:54:07,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:07,773 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 101, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:07,773 INFO L424 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:07,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:07,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2111171061, now seen corresponding path program 101 times [2018-10-22 15:54:07,773 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:07,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:07,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:07,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:07,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:07,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15352 backedges. 0 proven. 15352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:11,518 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:11,519 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:54:11,525 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:54:11,638 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-10-22 15:54:11,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:11,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 15352 backedges. 0 proven. 15352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:11,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:54:11,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-22 15:54:11,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-22 15:54:11,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-22 15:54:11,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-22 15:54:11,737 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand 104 states. [2018-10-22 15:54:12,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:12,180 INFO L93 Difference]: Finished difference Result 319 states and 319 transitions. [2018-10-22 15:54:12,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-22 15:54:12,180 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 310 [2018-10-22 15:54:12,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:12,181 INFO L225 Difference]: With dead ends: 319 [2018-10-22 15:54:12,181 INFO L226 Difference]: Without dead ends: 315 [2018-10-22 15:54:12,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-22 15:54:12,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-22 15:54:12,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2018-10-22 15:54:12,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-10-22 15:54:12,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 314 transitions. [2018-10-22 15:54:12,186 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 314 transitions. Word has length 310 [2018-10-22 15:54:12,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:12,186 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 314 transitions. [2018-10-22 15:54:12,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-22 15:54:12,186 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 314 transitions. [2018-10-22 15:54:12,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-10-22 15:54:12,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:12,188 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 102, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:12,188 INFO L424 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:12,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:12,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1043771763, now seen corresponding path program 102 times [2018-10-22 15:54:12,189 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:12,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:12,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:12,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:12,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15657 backedges. 0 proven. 15657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:15,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:15,966 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:54:15,973 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:54:16,091 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-10-22 15:54:16,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:16,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:16,195 INFO L134 CoverageAnalysis]: Checked inductivity of 15657 backedges. 0 proven. 15657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:16,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:54:16,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-22 15:54:16,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-22 15:54:16,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-22 15:54:16,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-22 15:54:16,217 INFO L87 Difference]: Start difference. First operand 314 states and 314 transitions. Second operand 105 states. [2018-10-22 15:54:16,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:16,993 INFO L93 Difference]: Finished difference Result 322 states and 322 transitions. [2018-10-22 15:54:16,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-22 15:54:16,993 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 313 [2018-10-22 15:54:16,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:16,994 INFO L225 Difference]: With dead ends: 322 [2018-10-22 15:54:16,994 INFO L226 Difference]: Without dead ends: 318 [2018-10-22 15:54:16,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-22 15:54:16,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-10-22 15:54:16,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 317. [2018-10-22 15:54:16,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-10-22 15:54:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2018-10-22 15:54:16,998 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 313 [2018-10-22 15:54:16,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:16,999 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2018-10-22 15:54:16,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-22 15:54:16,999 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2018-10-22 15:54:17,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-10-22 15:54:17,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:17,000 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 103, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:17,001 INFO L424 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:17,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:17,001 INFO L82 PathProgramCache]: Analyzing trace with hash -2089144629, now seen corresponding path program 103 times [2018-10-22 15:54:17,001 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:17,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:17,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:17,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:17,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 15965 backedges. 0 proven. 15965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:20,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:20,871 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:54:20,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:54:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:20,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 15965 backedges. 0 proven. 15965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:21,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:54:21,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-22 15:54:21,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-22 15:54:21,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-22 15:54:21,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-22 15:54:21,035 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand 106 states. [2018-10-22 15:54:21,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:21,754 INFO L93 Difference]: Finished difference Result 325 states and 325 transitions. [2018-10-22 15:54:21,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-22 15:54:21,755 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 316 [2018-10-22 15:54:21,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:21,755 INFO L225 Difference]: With dead ends: 325 [2018-10-22 15:54:21,755 INFO L226 Difference]: Without dead ends: 321 [2018-10-22 15:54:21,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-22 15:54:21,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2018-10-22 15:54:21,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 320. [2018-10-22 15:54:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2018-10-22 15:54:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 320 transitions. [2018-10-22 15:54:21,760 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 320 transitions. Word has length 316 [2018-10-22 15:54:21,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:21,760 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 320 transitions. [2018-10-22 15:54:21,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-22 15:54:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 320 transitions. [2018-10-22 15:54:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-10-22 15:54:21,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:21,762 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 104, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:21,762 INFO L424 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:21,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:21,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1984332339, now seen corresponding path program 104 times [2018-10-22 15:54:21,762 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:21,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:21,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:21,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:54:21,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:21,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16276 backedges. 0 proven. 16276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:25,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:25,716 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:54:25,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:54:25,779 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:54:25,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:25,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16276 backedges. 0 proven. 16276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:25,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:54:25,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-22 15:54:25,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-22 15:54:25,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-22 15:54:25,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-22 15:54:25,952 INFO L87 Difference]: Start difference. First operand 320 states and 320 transitions. Second operand 107 states. [2018-10-22 15:54:26,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:26,585 INFO L93 Difference]: Finished difference Result 328 states and 328 transitions. [2018-10-22 15:54:26,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-22 15:54:26,585 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 319 [2018-10-22 15:54:26,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:26,586 INFO L225 Difference]: With dead ends: 328 [2018-10-22 15:54:26,586 INFO L226 Difference]: Without dead ends: 324 [2018-10-22 15:54:26,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-22 15:54:26,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2018-10-22 15:54:26,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2018-10-22 15:54:26,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-10-22 15:54:26,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2018-10-22 15:54:26,590 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 319 [2018-10-22 15:54:26,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:26,590 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2018-10-22 15:54:26,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-22 15:54:26,590 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2018-10-22 15:54:26,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-10-22 15:54:26,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:26,591 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 105, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:26,591 INFO L424 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:26,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:26,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1962625141, now seen corresponding path program 105 times [2018-10-22 15:54:26,592 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:26,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:26,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:26,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:26,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:54:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16590 backedges. 0 proven. 16590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:30,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:54:30,620 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:54:30,627 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:54:30,766 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-10-22 15:54:30,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:54:30,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:54:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16590 backedges. 0 proven. 16590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:54:30,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:54:30,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-22 15:54:30,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-22 15:54:30,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-22 15:54:30,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-22 15:54:30,882 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand 108 states. [2018-10-22 15:54:31,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:54:31,579 INFO L93 Difference]: Finished difference Result 331 states and 331 transitions. [2018-10-22 15:54:31,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-22 15:54:31,579 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 322 [2018-10-22 15:54:31,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:54:31,580 INFO L225 Difference]: With dead ends: 331 [2018-10-22 15:54:31,580 INFO L226 Difference]: Without dead ends: 327 [2018-10-22 15:54:31,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-22 15:54:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-10-22 15:54:31,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 326. [2018-10-22 15:54:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2018-10-22 15:54:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 326 transitions. [2018-10-22 15:54:31,583 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 326 transitions. Word has length 322 [2018-10-22 15:54:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:54:31,584 INFO L481 AbstractCegarLoop]: Abstraction has 326 states and 326 transitions. [2018-10-22 15:54:31,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-22 15:54:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 326 transitions. [2018-10-22 15:54:31,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2018-10-22 15:54:31,585 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:54:31,585 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 106, 1, 1, 1, 1, 1, 1] [2018-10-22 15:54:31,585 INFO L424 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:54:31,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:54:31,585 INFO L82 PathProgramCache]: Analyzing trace with hash 471416077, now seen corresponding path program 106 times [2018-10-22 15:54:31,585 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:54:31,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:54:31,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:31,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:54:31,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:54:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-22 15:54:35,374 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 15:54:35,378 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 15:54:35,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:54:35 BoogieIcfgContainer [2018-10-22 15:54:35,379 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:54:35,379 INFO L168 Benchmark]: Toolchain (without parser) took 230785.34 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.0 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -260.9 MB). Peak memory consumption was 494.1 MB. Max. memory is 7.1 GB. [2018-10-22 15:54:35,381 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:54:35,381 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.20 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:54:35,381 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.06 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:54:35,382 INFO L168 Benchmark]: Boogie Preprocessor took 23.34 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:54:35,382 INFO L168 Benchmark]: RCFGBuilder took 322.45 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 727.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -777.4 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. [2018-10-22 15:54:35,382 INFO L168 Benchmark]: TraceAbstraction took 230082.72 ms. Allocated memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 27.3 MB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 505.9 MB). Peak memory consumption was 533.1 MB. Max. memory is 7.1 GB. [2018-10-22 15:54:35,384 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 314.20 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 38.06 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.34 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 322.45 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 727.7 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -777.4 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 230082.72 ms. Allocated memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: 27.3 MB). Free memory was 2.2 GB in the beginning and 1.7 GB in the end (delta: 505.9 MB). Peak memory consumption was 533.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 326 with TraceHistMax 107,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 105 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. TIMEOUT Result, 230.0s OverallTime, 108 OverallIterations, 107 TraceHistogramMax, 36.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 755 SDtfs, 5671 SDslu, 15838 SDs, 0 SdLazy, 18332 SolverSat, 168 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 24.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23210 GetRequests, 17539 SyntacticMatches, 0 SemanticMatches, 5671 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 169.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=326occurred in iteration=107, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 107 MinimizatonAttempts, 106 StatesRemovedByMinimization, 106 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 6.2s SatisfiabilityAnalysisTime, 176.5s InterpolantComputationTime, 34873 NumberOfCodeBlocks, 34873 NumberOfCodeBlocksAsserted, 3038 NumberOfCheckSat, 34661 ConstructedInterpolants, 0 QuantifiedInterpolants, 22083475 SizeOfPredicates, 105 NumberOfNonLiveVariables, 23730 ConjunctsInSsa, 5775 ConjunctsInUnsatCore, 212 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1179780 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown