java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invariants/even_true-unreach-call_true-valid-memsafety_true-no-overflow_false-termination.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 22:58:42,455 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 22:58:42,457 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 22:58:42,472 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 22:58:42,472 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 22:58:42,474 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 22:58:42,476 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 22:58:42,478 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 22:58:42,481 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 22:58:42,490 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 22:58:42,491 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 22:58:42,491 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 22:58:42,492 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 22:58:42,495 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 22:58:42,496 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 22:58:42,497 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 22:58:42,498 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 22:58:42,499 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 22:58:42,502 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 22:58:42,507 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 22:58:42,510 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 22:58:42,511 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 22:58:42,514 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-06 22:58:42,514 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-06 22:58:42,514 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-06 22:58:42,515 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-06 22:58:42,516 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-06 22:58:42,517 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-06 22:58:42,518 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-06 22:58:42,521 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-06 22:58:42,521 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-06 22:58:42,522 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-06 22:58:42,526 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-11-06 22:58:42,554 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 22:58:42,554 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 22:58:42,558 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 22:58:42,559 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 22:58:42,559 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 22:58:42,559 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 22:58:42,560 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 22:58:42,560 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 22:58:42,560 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 22:58:42,560 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 22:58:42,560 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 22:58:42,561 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 22:58:42,561 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 22:58:42,561 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 22:58:42,561 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 22:58:42,561 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 22:58:42,561 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 22:58:42,562 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 22:58:42,562 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 22:58:42,562 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:58:42,562 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 22:58:42,562 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 22:58:42,563 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 22:58:42,563 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 22:58:42,563 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 22:58:42,563 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 22:58:42,563 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 22:58:42,563 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 22:58:42,606 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 22:58:42,619 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 22:58:42,622 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 22:58:42,624 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 22:58:42,624 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 22:58:42,625 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/even_true-unreach-call_true-valid-memsafety_true-no-overflow_false-termination.c [2018-11-06 22:58:42,692 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/199343f00/d9f6a9c3364e437f8b2a7bca3a843277/FLAG6b1be218f [2018-11-06 22:58:43,111 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 22:58:43,112 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/even_true-unreach-call_true-valid-memsafety_true-no-overflow_false-termination.c [2018-11-06 22:58:43,118 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/199343f00/d9f6a9c3364e437f8b2a7bca3a843277/FLAG6b1be218f [2018-11-06 22:58:43,132 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/199343f00/d9f6a9c3364e437f8b2a7bca3a843277 [2018-11-06 22:58:43,143 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 22:58:43,144 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 22:58:43,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 22:58:43,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 22:58:43,149 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 22:58:43,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:43" (1/1) ... [2018-11-06 22:58:43,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53459a0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:43, skipping insertion in model container [2018-11-06 22:58:43,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:43" (1/1) ... [2018-11-06 22:58:43,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 22:58:43,185 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 22:58:43,371 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:58:43,375 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 22:58:43,392 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:58:43,408 INFO L193 MainTranslator]: Completed translation [2018-11-06 22:58:43,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:43 WrapperNode [2018-11-06 22:58:43,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 22:58:43,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 22:58:43,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 22:58:43,410 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 22:58:43,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:43" (1/1) ... [2018-11-06 22:58:43,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:43" (1/1) ... [2018-11-06 22:58:43,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 22:58:43,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 22:58:43,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 22:58:43,447 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 22:58:43,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:43" (1/1) ... [2018-11-06 22:58:43,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:43" (1/1) ... [2018-11-06 22:58:43,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:43" (1/1) ... [2018-11-06 22:58:43,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:43" (1/1) ... [2018-11-06 22:58:43,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:43" (1/1) ... [2018-11-06 22:58:43,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:43" (1/1) ... [2018-11-06 22:58:43,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:43" (1/1) ... [2018-11-06 22:58:43,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 22:58:43,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 22:58:43,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 22:58:43,469 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 22:58:43,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:58:43,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 22:58:43,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 22:58:43,785 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 22:58:43,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:43 BoogieIcfgContainer [2018-11-06 22:58:43,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 22:58:43,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 22:58:43,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 22:58:43,791 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 22:58:43,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:58:43" (1/3) ... [2018-11-06 22:58:43,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5962e219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:43, skipping insertion in model container [2018-11-06 22:58:43,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:43" (2/3) ... [2018-11-06 22:58:43,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5962e219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:43, skipping insertion in model container [2018-11-06 22:58:43,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:43" (3/3) ... [2018-11-06 22:58:43,795 INFO L112 eAbstractionObserver]: Analyzing ICFG even_true-unreach-call_true-valid-memsafety_true-no-overflow_false-termination.c [2018-11-06 22:58:43,802 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 22:58:43,809 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 22:58:43,825 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 22:58:43,858 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 22:58:43,859 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 22:58:43,859 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 22:58:43,859 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 22:58:43,859 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 22:58:43,859 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 22:58:43,859 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 22:58:43,859 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 22:58:43,860 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 22:58:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-11-06 22:58:43,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-11-06 22:58:43,880 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:43,881 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-11-06 22:58:43,883 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:43,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:43,890 INFO L82 PathProgramCache]: Analyzing trace with hash 889814567, now seen corresponding path program 1 times [2018-11-06 22:58:43,892 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:43,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:43,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:43,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:58:43,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:44,005 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:58:44,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 22:58:44,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-06 22:58:44,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-06 22:58:44,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:58:44,027 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-11-06 22:58:44,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:44,042 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-11-06 22:58:44,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-06 22:58:44,044 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-11-06 22:58:44,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:44,053 INFO L225 Difference]: With dead ends: 21 [2018-11-06 22:58:44,053 INFO L226 Difference]: Without dead ends: 9 [2018-11-06 22:58:44,057 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:58:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-11-06 22:58:44,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-11-06 22:58:44,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-06 22:58:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-11-06 22:58:44,091 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-11-06 22:58:44,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:44,091 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-11-06 22:58:44,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-06 22:58:44,092 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-11-06 22:58:44,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-06 22:58:44,092 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:44,093 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:44,093 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:44,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:44,094 INFO L82 PathProgramCache]: Analyzing trace with hash 147060653, now seen corresponding path program 1 times [2018-11-06 22:58:44,094 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:44,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:44,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:44,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:58:44,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:44,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:44,409 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:58:44,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 22:58:44,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 22:58:44,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 22:58:44,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:58:44,412 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2018-11-06 22:58:44,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:44,523 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-11-06 22:58:44,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 22:58:44,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-11-06 22:58:44,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:44,526 INFO L225 Difference]: With dead ends: 16 [2018-11-06 22:58:44,526 INFO L226 Difference]: Without dead ends: 12 [2018-11-06 22:58:44,527 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:58:44,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-06 22:58:44,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-06 22:58:44,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-06 22:58:44,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-06 22:58:44,532 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2018-11-06 22:58:44,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:44,532 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-06 22:58:44,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 22:58:44,532 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-06 22:58:44,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-06 22:58:44,533 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:44,533 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:44,534 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:44,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:44,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1665965330, now seen corresponding path program 1 times [2018-11-06 22:58:44,535 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:44,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:44,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:44,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:58:44,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:44,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:44,671 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:58:44,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:58:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:44,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:44,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:44,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-06 22:58:44,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 22:58:44,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 22:58:44,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:58:44,851 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2018-11-06 22:58:44,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:44,953 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-11-06 22:58:44,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 22:58:44,953 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-06 22:58:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:44,954 INFO L225 Difference]: With dead ends: 19 [2018-11-06 22:58:44,954 INFO L226 Difference]: Without dead ends: 15 [2018-11-06 22:58:44,955 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:58:44,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-06 22:58:44,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-06 22:58:44,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-06 22:58:44,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-11-06 22:58:44,961 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2018-11-06 22:58:44,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:44,961 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-11-06 22:58:44,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 22:58:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-11-06 22:58:44,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-06 22:58:44,964 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:44,964 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:44,965 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:44,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:44,965 INFO L82 PathProgramCache]: Analyzing trace with hash -420232819, now seen corresponding path program 2 times [2018-11-06 22:58:44,965 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:44,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:44,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:44,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:58:44,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:45,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:45,253 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:58:45,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:58:45,311 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:58:45,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:45,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:45,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:45,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-06 22:58:45,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 22:58:45,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 22:58:45,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:58:45,500 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2018-11-06 22:58:45,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:45,552 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-11-06 22:58:45,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 22:58:45,557 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-11-06 22:58:45,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:45,558 INFO L225 Difference]: With dead ends: 22 [2018-11-06 22:58:45,558 INFO L226 Difference]: Without dead ends: 18 [2018-11-06 22:58:45,559 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:58:45,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-06 22:58:45,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-06 22:58:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-06 22:58:45,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-06 22:58:45,566 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2018-11-06 22:58:45,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:45,566 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-06 22:58:45,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 22:58:45,567 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-06 22:58:45,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-06 22:58:45,567 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:45,568 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:45,568 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:45,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:45,568 INFO L82 PathProgramCache]: Analyzing trace with hash 2122450738, now seen corresponding path program 3 times [2018-11-06 22:58:45,568 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:45,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:45,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:45,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:45,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:45,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:45,847 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:58:45,863 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:58:45,884 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-06 22:58:45,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:45,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:45,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:45,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:45,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-06 22:58:45,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 22:58:45,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 22:58:45,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:58:45,988 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 7 states. [2018-11-06 22:58:46,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:46,097 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-11-06 22:58:46,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 22:58:46,097 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2018-11-06 22:58:46,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:46,098 INFO L225 Difference]: With dead ends: 25 [2018-11-06 22:58:46,099 INFO L226 Difference]: Without dead ends: 21 [2018-11-06 22:58:46,100 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:58:46,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-06 22:58:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-06 22:58:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-06 22:58:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-11-06 22:58:46,104 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 17 [2018-11-06 22:58:46,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:46,105 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-11-06 22:58:46,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 22:58:46,105 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-11-06 22:58:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-06 22:58:46,105 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:46,106 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:46,106 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:46,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:46,106 INFO L82 PathProgramCache]: Analyzing trace with hash 870097773, now seen corresponding path program 4 times [2018-11-06 22:58:46,106 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:46,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:46,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:46,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:46,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:46,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:46,277 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:58:46,293 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:58:46,304 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:58:46,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:46,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:46,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:46,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-06 22:58:46,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-06 22:58:46,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-06 22:58:46,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:58:46,589 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2018-11-06 22:58:46,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:46,784 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-11-06 22:58:46,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-06 22:58:46,785 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-11-06 22:58:46,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:46,786 INFO L225 Difference]: With dead ends: 28 [2018-11-06 22:58:46,787 INFO L226 Difference]: Without dead ends: 24 [2018-11-06 22:58:46,787 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:58:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-06 22:58:46,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-06 22:58:46,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-06 22:58:46,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-11-06 22:58:46,792 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 20 [2018-11-06 22:58:46,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:46,792 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-11-06 22:58:46,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-06 22:58:46,793 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-11-06 22:58:46,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-06 22:58:46,793 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:46,794 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:46,794 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:46,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:46,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1891149486, now seen corresponding path program 5 times [2018-11-06 22:58:46,795 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:46,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:46,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:46,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:46,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:47,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:47,147 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:58:47,156 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:58:47,168 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-06 22:58:47,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:47,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:47,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:47,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-06 22:58:47,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 22:58:47,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 22:58:47,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:58:47,259 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 9 states. [2018-11-06 22:58:47,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:47,406 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-11-06 22:58:47,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-06 22:58:47,408 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2018-11-06 22:58:47,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:47,409 INFO L225 Difference]: With dead ends: 31 [2018-11-06 22:58:47,410 INFO L226 Difference]: Without dead ends: 27 [2018-11-06 22:58:47,410 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:58:47,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-06 22:58:47,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-06 22:58:47,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-06 22:58:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-11-06 22:58:47,415 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2018-11-06 22:58:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:47,416 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-11-06 22:58:47,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 22:58:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-11-06 22:58:47,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-06 22:58:47,417 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:47,417 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:47,417 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:47,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:47,417 INFO L82 PathProgramCache]: Analyzing trace with hash -699622067, now seen corresponding path program 6 times [2018-11-06 22:58:47,418 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:47,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:47,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:47,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:47,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:47,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:47,671 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:58:47,681 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:58:47,698 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-06 22:58:47,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:47,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:47,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:47,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-06 22:58:47,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 22:58:47,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 22:58:47,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:58:47,768 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 10 states. [2018-11-06 22:58:47,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:47,891 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-11-06 22:58:47,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:58:47,892 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2018-11-06 22:58:47,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:47,894 INFO L225 Difference]: With dead ends: 34 [2018-11-06 22:58:47,894 INFO L226 Difference]: Without dead ends: 30 [2018-11-06 22:58:47,895 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:58:47,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-06 22:58:47,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-06 22:58:47,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-06 22:58:47,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-11-06 22:58:47,900 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2018-11-06 22:58:47,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:47,900 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-11-06 22:58:47,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 22:58:47,901 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-11-06 22:58:47,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-06 22:58:47,901 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:47,901 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:47,902 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:47,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:47,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1810984078, now seen corresponding path program 7 times [2018-11-06 22:58:47,902 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:47,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:47,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:47,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:47,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:48,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:48,092 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:58:48,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:58:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:48,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:48,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:48,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-11-06 22:58:48,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-06 22:58:48,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-06 22:58:48,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:58:48,235 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 11 states. [2018-11-06 22:58:48,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:48,350 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-11-06 22:58:48,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-06 22:58:48,350 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-11-06 22:58:48,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:48,351 INFO L225 Difference]: With dead ends: 37 [2018-11-06 22:58:48,351 INFO L226 Difference]: Without dead ends: 33 [2018-11-06 22:58:48,352 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:58:48,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-06 22:58:48,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-06 22:58:48,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-06 22:58:48,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-11-06 22:58:48,358 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 29 [2018-11-06 22:58:48,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:48,358 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-11-06 22:58:48,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-06 22:58:48,358 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-11-06 22:58:48,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-06 22:58:48,361 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:48,362 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:48,362 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:48,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:48,362 INFO L82 PathProgramCache]: Analyzing trace with hash -493768915, now seen corresponding path program 8 times [2018-11-06 22:58:48,363 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:48,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:48,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:48,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:58:48,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:48,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:48,837 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:58:48,849 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:58:48,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:58:48,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:48,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:49,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:49,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-11-06 22:58:49,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-06 22:58:49,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-06 22:58:49,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:58:49,117 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 12 states. [2018-11-06 22:58:49,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:49,266 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-11-06 22:58:49,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-06 22:58:49,268 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2018-11-06 22:58:49,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:49,269 INFO L225 Difference]: With dead ends: 40 [2018-11-06 22:58:49,269 INFO L226 Difference]: Without dead ends: 36 [2018-11-06 22:58:49,269 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:58:49,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-06 22:58:49,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-06 22:58:49,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-06 22:58:49,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-11-06 22:58:49,275 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 32 [2018-11-06 22:58:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:49,275 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-11-06 22:58:49,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-06 22:58:49,275 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-11-06 22:58:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-06 22:58:49,276 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:49,276 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:49,277 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:49,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:49,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1841935762, now seen corresponding path program 9 times [2018-11-06 22:58:49,277 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:49,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:49,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:49,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:49,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:49,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:49,549 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:58:49,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:58:49,624 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-06 22:58:49,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:49,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:49,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:49,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-11-06 22:58:49,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-06 22:58:49,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-06 22:58:49,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:58:49,718 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 13 states. [2018-11-06 22:58:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:50,163 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-11-06 22:58:50,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-06 22:58:50,164 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2018-11-06 22:58:50,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:50,165 INFO L225 Difference]: With dead ends: 43 [2018-11-06 22:58:50,166 INFO L226 Difference]: Without dead ends: 39 [2018-11-06 22:58:50,166 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:58:50,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-06 22:58:50,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-06 22:58:50,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-06 22:58:50,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-11-06 22:58:50,172 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 35 [2018-11-06 22:58:50,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:50,172 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-11-06 22:58:50,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-06 22:58:50,173 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-11-06 22:58:50,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-06 22:58:50,174 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:50,174 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:50,174 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:50,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:50,175 INFO L82 PathProgramCache]: Analyzing trace with hash 2054805773, now seen corresponding path program 10 times [2018-11-06 22:58:50,175 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:50,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:50,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:50,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:50,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:50,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:50,719 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:58:50,728 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:58:50,742 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:58:50,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:50,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:50,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:50,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-11-06 22:58:50,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-06 22:58:50,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-06 22:58:50,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:58:50,819 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 14 states. [2018-11-06 22:58:50,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:50,963 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-11-06 22:58:50,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-06 22:58:50,963 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-11-06 22:58:50,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:50,965 INFO L225 Difference]: With dead ends: 46 [2018-11-06 22:58:50,965 INFO L226 Difference]: Without dead ends: 42 [2018-11-06 22:58:50,966 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:58:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-06 22:58:50,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-06 22:58:50,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-06 22:58:50,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-11-06 22:58:50,971 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 38 [2018-11-06 22:58:50,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:50,971 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-11-06 22:58:50,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-06 22:58:50,971 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-11-06 22:58:50,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-06 22:58:50,972 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:50,972 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:50,973 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:50,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:50,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1392718, now seen corresponding path program 11 times [2018-11-06 22:58:50,973 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:50,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:50,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:50,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:50,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:51,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:51,504 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:58:51,516 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:58:51,687 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-06 22:58:51,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:51,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:51,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:51,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-11-06 22:58:51,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-06 22:58:51,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-06 22:58:51,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:58:51,889 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 15 states. [2018-11-06 22:58:52,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:52,079 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-11-06 22:58:52,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-06 22:58:52,079 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2018-11-06 22:58:52,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:52,081 INFO L225 Difference]: With dead ends: 49 [2018-11-06 22:58:52,081 INFO L226 Difference]: Without dead ends: 45 [2018-11-06 22:58:52,082 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:58:52,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-06 22:58:52,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-06 22:58:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-06 22:58:52,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-11-06 22:58:52,087 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 41 [2018-11-06 22:58:52,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:52,088 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-11-06 22:58:52,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-06 22:58:52,088 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-11-06 22:58:52,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-06 22:58:52,089 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:52,089 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:52,089 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:52,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:52,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1387062547, now seen corresponding path program 12 times [2018-11-06 22:58:52,090 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:52,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:52,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:52,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:52,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:52,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:52,551 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:58:52,563 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:58:52,583 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-06 22:58:52,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:52,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:52,694 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:52,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-11-06 22:58:52,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-06 22:58:52,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-06 22:58:52,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:58:52,695 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 16 states. [2018-11-06 22:58:52,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:52,869 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-11-06 22:58:52,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 22:58:52,870 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-11-06 22:58:52,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:52,871 INFO L225 Difference]: With dead ends: 52 [2018-11-06 22:58:52,871 INFO L226 Difference]: Without dead ends: 48 [2018-11-06 22:58:52,872 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:58:52,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-06 22:58:52,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-06 22:58:52,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-06 22:58:52,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-11-06 22:58:52,878 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 44 [2018-11-06 22:58:52,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:52,879 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-11-06 22:58:52,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-06 22:58:52,879 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-11-06 22:58:52,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-11-06 22:58:52,880 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:52,880 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:52,880 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:52,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:52,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1348710866, now seen corresponding path program 13 times [2018-11-06 22:58:52,881 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:52,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:52,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:52,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:52,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:53,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:53,418 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:58:53,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:58:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:53,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:53,578 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:53,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:53,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-06 22:58:53,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-06 22:58:53,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-06 22:58:53,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:58:53,599 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 17 states. [2018-11-06 22:58:53,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:53,792 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-11-06 22:58:53,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-06 22:58:53,793 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2018-11-06 22:58:53,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:53,793 INFO L225 Difference]: With dead ends: 55 [2018-11-06 22:58:53,794 INFO L226 Difference]: Without dead ends: 51 [2018-11-06 22:58:53,794 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:58:53,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-06 22:58:53,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-06 22:58:53,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-06 22:58:53,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-11-06 22:58:53,800 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 47 [2018-11-06 22:58:53,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:53,801 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-11-06 22:58:53,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-06 22:58:53,801 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-11-06 22:58:53,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-06 22:58:53,802 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:53,802 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:53,802 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:53,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:53,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1475048653, now seen corresponding path program 14 times [2018-11-06 22:58:53,803 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:53,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:53,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:53,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:58:53,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:54,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:54,258 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:58:54,272 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:58:54,290 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:58:54,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:54,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:54,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:54,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-11-06 22:58:54,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-06 22:58:54,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-06 22:58:54,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:58:54,367 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 18 states. [2018-11-06 22:58:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:55,098 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-11-06 22:58:55,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-06 22:58:55,100 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2018-11-06 22:58:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:55,101 INFO L225 Difference]: With dead ends: 58 [2018-11-06 22:58:55,101 INFO L226 Difference]: Without dead ends: 54 [2018-11-06 22:58:55,102 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:58:55,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-06 22:58:55,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-06 22:58:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-06 22:58:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-11-06 22:58:55,108 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 50 [2018-11-06 22:58:55,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:55,108 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-11-06 22:58:55,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-06 22:58:55,108 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-11-06 22:58:55,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-06 22:58:55,109 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:55,109 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:55,110 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:55,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:55,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1482257422, now seen corresponding path program 15 times [2018-11-06 22:58:55,110 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:55,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:55,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:55,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:55,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:56,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:56,059 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:58:56,068 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:58:56,136 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-06 22:58:56,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:56,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:56,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:56,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-11-06 22:58:56,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-06 22:58:56,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-06 22:58:56,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:58:56,220 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 19 states. [2018-11-06 22:58:56,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:56,542 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-11-06 22:58:56,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-06 22:58:56,543 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2018-11-06 22:58:56,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:56,544 INFO L225 Difference]: With dead ends: 61 [2018-11-06 22:58:56,546 INFO L226 Difference]: Without dead ends: 57 [2018-11-06 22:58:56,547 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:58:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-06 22:58:56,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-06 22:58:56,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-06 22:58:56,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-11-06 22:58:56,557 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 53 [2018-11-06 22:58:56,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:56,557 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-11-06 22:58:56,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-06 22:58:56,557 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-11-06 22:58:56,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-06 22:58:56,558 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:56,558 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:56,559 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:56,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:56,559 INFO L82 PathProgramCache]: Analyzing trace with hash 76605101, now seen corresponding path program 16 times [2018-11-06 22:58:56,559 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:56,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:56,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:56,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:56,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:56,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:56,910 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:58:56,919 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:58:56,934 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:58:56,934 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:56,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:57,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:57,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-11-06 22:58:57,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-06 22:58:57,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-06 22:58:57,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:58:57,054 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 20 states. [2018-11-06 22:58:57,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:57,358 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-11-06 22:58:57,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-06 22:58:57,359 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2018-11-06 22:58:57,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:57,360 INFO L225 Difference]: With dead ends: 64 [2018-11-06 22:58:57,360 INFO L226 Difference]: Without dead ends: 60 [2018-11-06 22:58:57,361 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:58:57,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-06 22:58:57,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-06 22:58:57,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-06 22:58:57,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-11-06 22:58:57,366 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 56 [2018-11-06 22:58:57,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:57,367 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-11-06 22:58:57,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-06 22:58:57,367 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-11-06 22:58:57,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-06 22:58:57,368 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:57,368 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:57,368 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:57,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:57,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1331343854, now seen corresponding path program 17 times [2018-11-06 22:58:57,369 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:57,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:57,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:57,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:57,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:57,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:57,829 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:58:57,842 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:58:57,908 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-06 22:58:57,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:57,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:58,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:58,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-11-06 22:58:58,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-06 22:58:58,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-06 22:58:58,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:58:58,013 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 21 states. [2018-11-06 22:58:58,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:58,298 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-11-06 22:58:58,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-06 22:58:58,298 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2018-11-06 22:58:58,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:58,299 INFO L225 Difference]: With dead ends: 67 [2018-11-06 22:58:58,299 INFO L226 Difference]: Without dead ends: 63 [2018-11-06 22:58:58,300 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:58:58,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-06 22:58:58,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-06 22:58:58,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-06 22:58:58,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-11-06 22:58:58,306 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 59 [2018-11-06 22:58:58,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:58,306 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-11-06 22:58:58,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-06 22:58:58,307 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-11-06 22:58:58,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-11-06 22:58:58,307 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:58,307 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:58,308 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:58,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:58,308 INFO L82 PathProgramCache]: Analyzing trace with hash -888049523, now seen corresponding path program 18 times [2018-11-06 22:58:58,308 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:58,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:58,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:58,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:58,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:58,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:58,717 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:58:58,726 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:58:58,756 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-06 22:58:58,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:58:58,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:58,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:58,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-11-06 22:58:58,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 22:58:58,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 22:58:58,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:58:58,830 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 22 states. [2018-11-06 22:58:59,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:58:59,170 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-11-06 22:58:59,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 22:58:59,171 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2018-11-06 22:58:59,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:58:59,172 INFO L225 Difference]: With dead ends: 70 [2018-11-06 22:58:59,172 INFO L226 Difference]: Without dead ends: 66 [2018-11-06 22:58:59,173 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:58:59,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-06 22:58:59,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-06 22:58:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-06 22:58:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-11-06 22:58:59,177 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 62 [2018-11-06 22:58:59,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:58:59,178 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-11-06 22:58:59,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 22:58:59,178 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-11-06 22:58:59,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-06 22:58:59,179 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:58:59,179 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1] [2018-11-06 22:58:59,179 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:58:59,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:58:59,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1731069902, now seen corresponding path program 19 times [2018-11-06 22:58:59,180 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:58:59,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:58:59,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:59,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:58:59,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:58:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:59,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:58:59,563 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:58:59,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:58:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:58:59,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:58:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:58:59,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:58:59,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-11-06 22:58:59,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-06 22:58:59,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-06 22:58:59,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:58:59,692 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 23 states. [2018-11-06 22:59:00,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:00,061 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-11-06 22:59:00,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-06 22:59:00,068 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2018-11-06 22:59:00,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:00,069 INFO L225 Difference]: With dead ends: 73 [2018-11-06 22:59:00,069 INFO L226 Difference]: Without dead ends: 69 [2018-11-06 22:59:00,069 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:59:00,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-06 22:59:00,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-06 22:59:00,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-06 22:59:00,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-11-06 22:59:00,074 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 65 [2018-11-06 22:59:00,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:00,075 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-11-06 22:59:00,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-06 22:59:00,075 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-11-06 22:59:00,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-06 22:59:00,076 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:00,076 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:00,076 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:00,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:00,077 INFO L82 PathProgramCache]: Analyzing trace with hash 817566317, now seen corresponding path program 20 times [2018-11-06 22:59:00,077 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:00,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:00,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:00,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:59:00,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:00,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:00,901 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:59:00,910 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:59:00,930 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:59:00,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:00,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:01,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:01,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-11-06 22:59:01,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-06 22:59:01,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-06 22:59:01,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:59:01,096 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 24 states. [2018-11-06 22:59:01,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:01,433 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-11-06 22:59:01,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-06 22:59:01,434 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2018-11-06 22:59:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:01,435 INFO L225 Difference]: With dead ends: 76 [2018-11-06 22:59:01,436 INFO L226 Difference]: Without dead ends: 72 [2018-11-06 22:59:01,437 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:59:01,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-06 22:59:01,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-06 22:59:01,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-06 22:59:01,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-11-06 22:59:01,441 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 68 [2018-11-06 22:59:01,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:01,441 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-11-06 22:59:01,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-06 22:59:01,442 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-11-06 22:59:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-06 22:59:01,442 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:01,443 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:01,443 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:01,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:01,443 INFO L82 PathProgramCache]: Analyzing trace with hash 807307858, now seen corresponding path program 21 times [2018-11-06 22:59:01,443 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:01,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:01,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:01,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:01,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:01,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:01,897 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:59:01,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:59:01,934 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-06 22:59:01,934 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:01,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:02,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:02,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-11-06 22:59:02,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-06 22:59:02,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-06 22:59:02,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:59:02,026 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 25 states. [2018-11-06 22:59:02,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:02,438 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-11-06 22:59:02,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-06 22:59:02,439 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 71 [2018-11-06 22:59:02,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:02,440 INFO L225 Difference]: With dead ends: 79 [2018-11-06 22:59:02,440 INFO L226 Difference]: Without dead ends: 75 [2018-11-06 22:59:02,441 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2018-11-06 22:59:02,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-06 22:59:02,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-06 22:59:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-06 22:59:02,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-11-06 22:59:02,445 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 71 [2018-11-06 22:59:02,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:02,445 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-11-06 22:59:02,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-06 22:59:02,446 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-11-06 22:59:02,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-11-06 22:59:02,446 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:02,446 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:02,447 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:02,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:02,447 INFO L82 PathProgramCache]: Analyzing trace with hash 140233805, now seen corresponding path program 22 times [2018-11-06 22:59:02,447 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:02,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:02,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:02,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:02,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:03,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:03,014 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:59:03,023 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:59:03,043 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:59:03,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:03,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:03,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:03,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-11-06 22:59:03,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-06 22:59:03,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-06 22:59:03,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-11-06 22:59:03,270 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 26 states. [2018-11-06 22:59:03,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:03,665 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-11-06 22:59:03,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-06 22:59:03,665 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2018-11-06 22:59:03,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:03,667 INFO L225 Difference]: With dead ends: 82 [2018-11-06 22:59:03,667 INFO L226 Difference]: Without dead ends: 78 [2018-11-06 22:59:03,668 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2018-11-06 22:59:03,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-06 22:59:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-11-06 22:59:03,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-06 22:59:03,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-11-06 22:59:03,671 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 74 [2018-11-06 22:59:03,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:03,671 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-11-06 22:59:03,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-06 22:59:03,671 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-11-06 22:59:03,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-06 22:59:03,672 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:03,672 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:03,672 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:03,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:03,672 INFO L82 PathProgramCache]: Analyzing trace with hash 150799474, now seen corresponding path program 23 times [2018-11-06 22:59:03,673 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:03,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:03,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:03,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:03,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:04,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:04,148 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:59:04,156 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:59:04,183 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-11-06 22:59:04,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:04,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:04,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:04,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-11-06 22:59:04,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-06 22:59:04,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-06 22:59:04,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-11-06 22:59:04,269 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 27 states. [2018-11-06 22:59:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:04,776 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-11-06 22:59:04,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-06 22:59:04,776 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2018-11-06 22:59:04,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:04,778 INFO L225 Difference]: With dead ends: 85 [2018-11-06 22:59:04,778 INFO L226 Difference]: Without dead ends: 81 [2018-11-06 22:59:04,779 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:59:04,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-06 22:59:04,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-11-06 22:59:04,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-11-06 22:59:04,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-11-06 22:59:04,783 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 77 [2018-11-06 22:59:04,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:04,784 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-11-06 22:59:04,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-06 22:59:04,784 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-11-06 22:59:04,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-06 22:59:04,784 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:04,784 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:04,785 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:04,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:04,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1380032045, now seen corresponding path program 24 times [2018-11-06 22:59:04,785 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:04,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:04,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:04,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:04,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:05,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:05,290 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:59:05,299 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:59:05,335 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-11-06 22:59:05,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:05,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:05,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:05,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-11-06 22:59:05,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-06 22:59:05,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-06 22:59:05,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:59:05,431 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 28 states. [2018-11-06 22:59:05,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:05,925 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-11-06 22:59:05,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-06 22:59:05,926 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2018-11-06 22:59:05,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:05,927 INFO L225 Difference]: With dead ends: 88 [2018-11-06 22:59:05,927 INFO L226 Difference]: Without dead ends: 84 [2018-11-06 22:59:05,929 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2018-11-06 22:59:05,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-06 22:59:05,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-11-06 22:59:05,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-11-06 22:59:05,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-11-06 22:59:05,933 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 80 [2018-11-06 22:59:05,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:05,933 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-11-06 22:59:05,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-06 22:59:05,934 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-11-06 22:59:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-11-06 22:59:05,934 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:05,934 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:05,935 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:05,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:05,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1738578286, now seen corresponding path program 25 times [2018-11-06 22:59:05,935 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:05,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:05,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:05,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:05,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:07,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:07,214 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:59:07,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:59:07,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:07,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:07,377 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:07,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:07,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-11-06 22:59:07,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-06 22:59:07,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-06 22:59:07,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-11-06 22:59:07,398 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 29 states. [2018-11-06 22:59:08,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:08,014 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-11-06 22:59:08,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-06 22:59:08,015 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 83 [2018-11-06 22:59:08,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:08,016 INFO L225 Difference]: With dead ends: 91 [2018-11-06 22:59:08,016 INFO L226 Difference]: Without dead ends: 87 [2018-11-06 22:59:08,017 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2018-11-06 22:59:08,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-11-06 22:59:08,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-11-06 22:59:08,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-06 22:59:08,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-11-06 22:59:08,022 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 83 [2018-11-06 22:59:08,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:08,022 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-11-06 22:59:08,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-06 22:59:08,022 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-11-06 22:59:08,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-11-06 22:59:08,023 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:08,023 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:08,023 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:08,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:08,024 INFO L82 PathProgramCache]: Analyzing trace with hash 473597965, now seen corresponding path program 26 times [2018-11-06 22:59:08,024 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:08,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:08,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:08,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:59:08,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:09,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:09,168 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:59:09,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:59:09,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:59:09,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:09,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 1053 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:09,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:09,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-11-06 22:59:09,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-06 22:59:09,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-06 22:59:09,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-11-06 22:59:09,290 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 30 states. [2018-11-06 22:59:09,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:09,976 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-11-06 22:59:09,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-06 22:59:09,977 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2018-11-06 22:59:09,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:09,978 INFO L225 Difference]: With dead ends: 94 [2018-11-06 22:59:09,979 INFO L226 Difference]: Without dead ends: 90 [2018-11-06 22:59:09,980 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:59:09,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-11-06 22:59:09,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-11-06 22:59:09,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-06 22:59:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-11-06 22:59:09,984 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 86 [2018-11-06 22:59:09,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:09,984 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-11-06 22:59:09,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-06 22:59:09,985 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-11-06 22:59:09,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-06 22:59:09,985 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:09,985 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:09,986 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:09,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:09,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1438101682, now seen corresponding path program 27 times [2018-11-06 22:59:09,986 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:09,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:09,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:09,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:09,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:10,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:10,552 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:59:10,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:59:10,598 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-11-06 22:59:10,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:10,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:10,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:10,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-11-06 22:59:10,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-06 22:59:10,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-06 22:59:10,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:59:10,772 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 31 states. [2018-11-06 22:59:11,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:11,330 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-11-06 22:59:11,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-06 22:59:11,331 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 89 [2018-11-06 22:59:11,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:11,332 INFO L225 Difference]: With dead ends: 97 [2018-11-06 22:59:11,332 INFO L226 Difference]: Without dead ends: 93 [2018-11-06 22:59:11,333 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2018-11-06 22:59:11,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-11-06 22:59:11,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-11-06 22:59:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-06 22:59:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-11-06 22:59:11,337 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 89 [2018-11-06 22:59:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:11,338 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-11-06 22:59:11,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-06 22:59:11,338 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-11-06 22:59:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-11-06 22:59:11,339 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:11,339 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:11,340 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:11,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:11,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1637124589, now seen corresponding path program 28 times [2018-11-06 22:59:11,340 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:11,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:11,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:11,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:11,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:12,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:12,208 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:59:12,217 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:59:12,241 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:59:12,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:12,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:12,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:12,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-11-06 22:59:12,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-06 22:59:12,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-06 22:59:12,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-11-06 22:59:12,337 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 32 states. [2018-11-06 22:59:12,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:12,991 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-11-06 22:59:12,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-06 22:59:12,991 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 92 [2018-11-06 22:59:12,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:12,992 INFO L225 Difference]: With dead ends: 100 [2018-11-06 22:59:12,992 INFO L226 Difference]: Without dead ends: 96 [2018-11-06 22:59:12,994 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2018-11-06 22:59:12,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-11-06 22:59:12,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-11-06 22:59:12,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-11-06 22:59:12,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-11-06 22:59:12,998 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 92 [2018-11-06 22:59:12,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:12,998 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-11-06 22:59:12,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-06 22:59:12,998 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-11-06 22:59:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-11-06 22:59:12,999 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:12,999 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:12,999 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:12,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:12,999 INFO L82 PathProgramCache]: Analyzing trace with hash -621288750, now seen corresponding path program 29 times [2018-11-06 22:59:13,000 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:13,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:13,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:13,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:13,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:14,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:14,004 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:59:14,012 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:59:14,047 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-11-06 22:59:14,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:14,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:14,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:14,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-11-06 22:59:14,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-06 22:59:14,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-06 22:59:14,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-11-06 22:59:14,156 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 33 states. [2018-11-06 22:59:14,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:14,792 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-11-06 22:59:14,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-06 22:59:14,792 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 95 [2018-11-06 22:59:14,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:14,794 INFO L225 Difference]: With dead ends: 103 [2018-11-06 22:59:14,794 INFO L226 Difference]: Without dead ends: 99 [2018-11-06 22:59:14,795 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 22:59:14,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-11-06 22:59:14,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-11-06 22:59:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-11-06 22:59:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-11-06 22:59:14,799 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 95 [2018-11-06 22:59:14,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:14,800 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-11-06 22:59:14,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-06 22:59:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-11-06 22:59:14,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-11-06 22:59:14,800 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:14,801 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:14,801 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:14,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:14,801 INFO L82 PathProgramCache]: Analyzing trace with hash -350379059, now seen corresponding path program 30 times [2018-11-06 22:59:14,801 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:14,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:14,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:14,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:14,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 0 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:15,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:15,607 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:59:15,615 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:59:15,659 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-11-06 22:59:15,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:15,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 0 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:15,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:15,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-11-06 22:59:15,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-06 22:59:15,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-06 22:59:15,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 22:59:15,747 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 34 states. [2018-11-06 22:59:16,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:16,431 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-11-06 22:59:16,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-06 22:59:16,431 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 98 [2018-11-06 22:59:16,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:16,432 INFO L225 Difference]: With dead ends: 106 [2018-11-06 22:59:16,433 INFO L226 Difference]: Without dead ends: 102 [2018-11-06 22:59:16,434 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2018-11-06 22:59:16,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-11-06 22:59:16,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-11-06 22:59:16,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-11-06 22:59:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-11-06 22:59:16,438 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 98 [2018-11-06 22:59:16,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:16,439 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-11-06 22:59:16,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-06 22:59:16,439 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-11-06 22:59:16,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-06 22:59:16,439 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:16,440 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:16,440 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:16,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:16,440 INFO L82 PathProgramCache]: Analyzing trace with hash 76676338, now seen corresponding path program 31 times [2018-11-06 22:59:16,440 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:16,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:16,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:16,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:16,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:17,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:17,294 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:59:17,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:59:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:17,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 1488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:17,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:17,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-11-06 22:59:17,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-06 22:59:17,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-06 22:59:17,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-11-06 22:59:17,429 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 35 states. [2018-11-06 22:59:18,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:18,333 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-11-06 22:59:18,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-06 22:59:18,334 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 101 [2018-11-06 22:59:18,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:18,334 INFO L225 Difference]: With dead ends: 109 [2018-11-06 22:59:18,335 INFO L226 Difference]: Without dead ends: 105 [2018-11-06 22:59:18,335 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2018-11-06 22:59:18,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-11-06 22:59:18,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-11-06 22:59:18,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-11-06 22:59:18,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-11-06 22:59:18,340 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 101 [2018-11-06 22:59:18,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:18,340 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-11-06 22:59:18,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-06 22:59:18,341 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-11-06 22:59:18,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-11-06 22:59:18,341 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:18,341 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:18,342 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:18,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:18,342 INFO L82 PathProgramCache]: Analyzing trace with hash 790877613, now seen corresponding path program 32 times [2018-11-06 22:59:18,342 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:18,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:18,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:18,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:59:18,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 0 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:19,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:19,851 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:59:19,860 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:59:19,906 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:59:19,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:19,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 0 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:20,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:20,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-11-06 22:59:20,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-06 22:59:20,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-06 22:59:20,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-11-06 22:59:20,008 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 36 states. [2018-11-06 22:59:20,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:20,759 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-11-06 22:59:20,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-06 22:59:20,760 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 104 [2018-11-06 22:59:20,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:20,761 INFO L225 Difference]: With dead ends: 112 [2018-11-06 22:59:20,761 INFO L226 Difference]: Without dead ends: 108 [2018-11-06 22:59:20,762 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2018-11-06 22:59:20,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-11-06 22:59:20,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-11-06 22:59:20,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-11-06 22:59:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-11-06 22:59:20,767 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 104 [2018-11-06 22:59:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:20,767 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-11-06 22:59:20,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-06 22:59:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-11-06 22:59:20,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-11-06 22:59:20,767 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:20,768 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:20,768 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:20,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:20,768 INFO L82 PathProgramCache]: Analyzing trace with hash 293076754, now seen corresponding path program 33 times [2018-11-06 22:59:20,768 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:20,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:20,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:20,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:20,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:21,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:21,796 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:59:21,804 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:59:21,862 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-11-06 22:59:21,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:21,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:21,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:21,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-11-06 22:59:21,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-06 22:59:21,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-06 22:59:21,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-11-06 22:59:21,957 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 37 states. [2018-11-06 22:59:22,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:22,757 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-11-06 22:59:22,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-06 22:59:22,758 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 107 [2018-11-06 22:59:22,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:22,759 INFO L225 Difference]: With dead ends: 115 [2018-11-06 22:59:22,759 INFO L226 Difference]: Without dead ends: 111 [2018-11-06 22:59:22,760 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2018-11-06 22:59:22,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-11-06 22:59:22,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-11-06 22:59:22,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-11-06 22:59:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-11-06 22:59:22,763 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 107 [2018-11-06 22:59:22,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:22,764 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-11-06 22:59:22,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-06 22:59:22,764 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-11-06 22:59:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-11-06 22:59:22,764 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:22,764 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:22,765 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:22,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:22,765 INFO L82 PathProgramCache]: Analyzing trace with hash 829759373, now seen corresponding path program 34 times [2018-11-06 22:59:22,765 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:22,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:22,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:22,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:22,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:24,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:24,334 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:59:24,343 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:59:24,375 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:59:24,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:24,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 1785 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:24,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:24,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-11-06 22:59:24,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-06 22:59:24,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-06 22:59:24,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-11-06 22:59:24,653 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 38 states. [2018-11-06 22:59:25,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:25,495 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-11-06 22:59:25,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-06 22:59:25,495 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 110 [2018-11-06 22:59:25,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:25,497 INFO L225 Difference]: With dead ends: 118 [2018-11-06 22:59:25,497 INFO L226 Difference]: Without dead ends: 114 [2018-11-06 22:59:25,498 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2018-11-06 22:59:25,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-11-06 22:59:25,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-11-06 22:59:25,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-11-06 22:59:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-11-06 22:59:25,502 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 110 [2018-11-06 22:59:25,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:25,502 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-11-06 22:59:25,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-06 22:59:25,502 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-11-06 22:59:25,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-11-06 22:59:25,503 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:25,503 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:25,503 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:25,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:25,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1021581006, now seen corresponding path program 35 times [2018-11-06 22:59:25,503 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:25,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:25,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:25,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:25,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:26,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:26,666 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:59:26,684 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:59:26,731 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-11-06 22:59:26,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:26,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 1890 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:26,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:26,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-11-06 22:59:26,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-06 22:59:26,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-06 22:59:26,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-11-06 22:59:26,833 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 39 states. [2018-11-06 22:59:27,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:27,718 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-11-06 22:59:27,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-06 22:59:27,719 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 113 [2018-11-06 22:59:27,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:27,719 INFO L225 Difference]: With dead ends: 121 [2018-11-06 22:59:27,720 INFO L226 Difference]: Without dead ends: 117 [2018-11-06 22:59:27,720 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:59:27,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-11-06 22:59:27,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-11-06 22:59:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-11-06 22:59:27,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-11-06 22:59:27,724 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 113 [2018-11-06 22:59:27,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:27,724 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-11-06 22:59:27,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-06 22:59:27,724 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-11-06 22:59:27,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-11-06 22:59:27,725 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:27,725 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:27,725 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:27,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:27,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1667203437, now seen corresponding path program 36 times [2018-11-06 22:59:27,726 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:27,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:27,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:27,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:27,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:28,840 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:28,840 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:59:28,848 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:59:28,896 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-11-06 22:59:28,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:28,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1998 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:29,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:29,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-11-06 22:59:29,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-06 22:59:29,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-06 22:59:29,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:59:29,947 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 40 states. [2018-11-06 22:59:31,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:31,309 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-11-06 22:59:31,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-06 22:59:31,309 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 116 [2018-11-06 22:59:31,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:31,310 INFO L225 Difference]: With dead ends: 124 [2018-11-06 22:59:31,311 INFO L226 Difference]: Without dead ends: 120 [2018-11-06 22:59:31,312 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2018-11-06 22:59:31,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-11-06 22:59:31,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-11-06 22:59:31,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-11-06 22:59:31,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-11-06 22:59:31,315 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 116 [2018-11-06 22:59:31,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:31,315 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-11-06 22:59:31,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-06 22:59:31,316 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-11-06 22:59:31,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-11-06 22:59:31,316 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:31,316 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:31,317 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:31,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:31,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2104474450, now seen corresponding path program 37 times [2018-11-06 22:59:31,317 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:31,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:31,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:31,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:31,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 0 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:32,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:32,279 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:59:32,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:59:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:32,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 0 proven. 2109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:32,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:32,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-11-06 22:59:32,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-11-06 22:59:32,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-11-06 22:59:32,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-11-06 22:59:32,486 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 41 states. [2018-11-06 22:59:33,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:33,493 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-11-06 22:59:33,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-06 22:59:33,493 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 119 [2018-11-06 22:59:33,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:33,494 INFO L225 Difference]: With dead ends: 127 [2018-11-06 22:59:33,495 INFO L226 Difference]: Without dead ends: 123 [2018-11-06 22:59:33,496 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2018-11-06 22:59:33,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-11-06 22:59:33,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-11-06 22:59:33,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-11-06 22:59:33,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-11-06 22:59:33,499 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 119 [2018-11-06 22:59:33,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:33,499 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-11-06 22:59:33,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-11-06 22:59:33,500 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-11-06 22:59:33,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-11-06 22:59:33,500 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:33,500 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:33,500 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:33,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:33,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2085553331, now seen corresponding path program 38 times [2018-11-06 22:59:33,501 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:33,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:33,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:33,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:59:33,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 0 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:34,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:34,530 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:59:34,539 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:59:34,572 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:59:34,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:34,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 0 proven. 2223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:34,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:34,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-11-06 22:59:34,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-06 22:59:34,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-06 22:59:34,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-11-06 22:59:34,668 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 42 states. [2018-11-06 22:59:35,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:35,676 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-11-06 22:59:35,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-06 22:59:35,676 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 122 [2018-11-06 22:59:35,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:35,677 INFO L225 Difference]: With dead ends: 130 [2018-11-06 22:59:35,678 INFO L226 Difference]: Without dead ends: 126 [2018-11-06 22:59:35,679 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2018-11-06 22:59:35,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-11-06 22:59:35,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-11-06 22:59:35,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-11-06 22:59:35,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-11-06 22:59:35,683 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 122 [2018-11-06 22:59:35,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:35,683 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-11-06 22:59:35,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-06 22:59:35,683 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-11-06 22:59:35,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-06 22:59:35,684 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:35,684 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:35,684 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:35,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:35,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1726313842, now seen corresponding path program 39 times [2018-11-06 22:59:35,685 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:35,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:35,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:35,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:35,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:36,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:36,739 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:59:36,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:59:36,816 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-11-06 22:59:36,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:36,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 2340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:36,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:36,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-11-06 22:59:36,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-06 22:59:36,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-06 22:59:36,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-11-06 22:59:36,953 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 43 states. [2018-11-06 22:59:39,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:39,056 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-11-06 22:59:39,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-06 22:59:39,057 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 125 [2018-11-06 22:59:39,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:39,058 INFO L225 Difference]: With dead ends: 133 [2018-11-06 22:59:39,058 INFO L226 Difference]: Without dead ends: 129 [2018-11-06 22:59:39,060 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2018-11-06 22:59:39,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-11-06 22:59:39,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-11-06 22:59:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-11-06 22:59:39,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-11-06 22:59:39,064 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 125 [2018-11-06 22:59:39,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:39,064 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-11-06 22:59:39,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-06 22:59:39,065 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-11-06 22:59:39,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-11-06 22:59:39,065 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:39,065 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:39,066 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:39,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:39,066 INFO L82 PathProgramCache]: Analyzing trace with hash 2125958445, now seen corresponding path program 40 times [2018-11-06 22:59:39,066 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:39,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:39,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:39,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:39,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 0 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:41,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:41,121 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:59:41,129 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:59:41,160 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:59:41,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:41,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 0 proven. 2460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:41,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:41,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-11-06 22:59:41,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-06 22:59:41,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-06 22:59:41,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-11-06 22:59:41,286 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 44 states. [2018-11-06 22:59:42,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:42,451 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-11-06 22:59:42,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-06 22:59:42,452 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 128 [2018-11-06 22:59:42,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:42,453 INFO L225 Difference]: With dead ends: 136 [2018-11-06 22:59:42,453 INFO L226 Difference]: Without dead ends: 132 [2018-11-06 22:59:42,455 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2018-11-06 22:59:42,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-11-06 22:59:42,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-11-06 22:59:42,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-11-06 22:59:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-11-06 22:59:42,459 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 128 [2018-11-06 22:59:42,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:42,460 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-11-06 22:59:42,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-06 22:59:42,460 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-11-06 22:59:42,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-11-06 22:59:42,461 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:42,461 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:42,461 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:42,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:42,461 INFO L82 PathProgramCache]: Analyzing trace with hash -2005985390, now seen corresponding path program 41 times [2018-11-06 22:59:42,462 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:42,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:42,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:42,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:42,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 0 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:43,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:43,784 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:59:43,792 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:59:43,842 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-11-06 22:59:43,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:43,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 0 proven. 2583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:43,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:43,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-11-06 22:59:43,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-06 22:59:43,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-06 22:59:43,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-11-06 22:59:43,984 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 45 states. [2018-11-06 22:59:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:45,087 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-11-06 22:59:45,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-06 22:59:45,087 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 131 [2018-11-06 22:59:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:45,089 INFO L225 Difference]: With dead ends: 139 [2018-11-06 22:59:45,089 INFO L226 Difference]: Without dead ends: 135 [2018-11-06 22:59:45,090 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2018-11-06 22:59:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-11-06 22:59:45,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-11-06 22:59:45,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-11-06 22:59:45,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-11-06 22:59:45,095 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 131 [2018-11-06 22:59:45,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:45,095 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-11-06 22:59:45,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-06 22:59:45,095 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-11-06 22:59:45,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-11-06 22:59:45,096 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:45,096 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:45,096 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:45,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:45,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1312896781, now seen corresponding path program 42 times [2018-11-06 22:59:45,097 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:45,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:45,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:45,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:45,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:46,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 0 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:46,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:46,304 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:59:46,313 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:59:46,376 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-11-06 22:59:46,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:46,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 0 proven. 2709 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:46,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:46,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-11-06 22:59:46,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-11-06 22:59:46,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-11-06 22:59:46,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-11-06 22:59:46,498 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 46 states. [2018-11-06 22:59:47,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:47,651 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-11-06 22:59:47,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-06 22:59:47,652 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 134 [2018-11-06 22:59:47,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:47,653 INFO L225 Difference]: With dead ends: 142 [2018-11-06 22:59:47,653 INFO L226 Difference]: Without dead ends: 138 [2018-11-06 22:59:47,654 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2018-11-06 22:59:47,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-11-06 22:59:47,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-11-06 22:59:47,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-11-06 22:59:47,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-11-06 22:59:47,658 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 134 [2018-11-06 22:59:47,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:47,659 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-11-06 22:59:47,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-11-06 22:59:47,659 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-11-06 22:59:47,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-11-06 22:59:47,660 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:47,660 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:47,660 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:47,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:47,660 INFO L82 PathProgramCache]: Analyzing trace with hash -310468174, now seen corresponding path program 43 times [2018-11-06 22:59:47,660 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:47,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:47,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:47,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:47,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:49,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:49,316 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:59:49,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:59:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:49,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 2838 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:49,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:49,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-11-06 22:59:49,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-11-06 22:59:49,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-11-06 22:59:49,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-11-06 22:59:49,483 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 47 states. [2018-11-06 22:59:50,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:50,733 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-11-06 22:59:50,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-06 22:59:50,734 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 137 [2018-11-06 22:59:50,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:50,735 INFO L225 Difference]: With dead ends: 145 [2018-11-06 22:59:50,735 INFO L226 Difference]: Without dead ends: 141 [2018-11-06 22:59:50,736 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2018-11-06 22:59:50,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-11-06 22:59:50,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-11-06 22:59:50,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-11-06 22:59:50,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-11-06 22:59:50,741 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 137 [2018-11-06 22:59:50,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:50,742 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-11-06 22:59:50,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-11-06 22:59:50,742 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-11-06 22:59:50,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-11-06 22:59:50,743 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:50,743 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:50,743 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:50,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:50,743 INFO L82 PathProgramCache]: Analyzing trace with hash -644089619, now seen corresponding path program 44 times [2018-11-06 22:59:50,743 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:50,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:50,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:50,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:59:50,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:50,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:52,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:52,491 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:59:52,500 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:59:52,537 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:59:52,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:52,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:52,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:52,664 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-11-06 22:59:52,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-11-06 22:59:52,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-11-06 22:59:52,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-11-06 22:59:52,665 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 48 states. [2018-11-06 22:59:54,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:54,018 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-11-06 22:59:54,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-11-06 22:59:54,019 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 140 [2018-11-06 22:59:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:54,020 INFO L225 Difference]: With dead ends: 148 [2018-11-06 22:59:54,020 INFO L226 Difference]: Without dead ends: 144 [2018-11-06 22:59:54,021 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2018-11-06 22:59:54,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-11-06 22:59:54,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-11-06 22:59:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-11-06 22:59:54,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-11-06 22:59:54,024 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 140 [2018-11-06 22:59:54,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:54,024 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-11-06 22:59:54,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-11-06 22:59:54,025 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-11-06 22:59:54,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-11-06 22:59:54,025 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:54,025 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:54,025 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:54,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:54,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1006234670, now seen corresponding path program 45 times [2018-11-06 22:59:54,026 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:54,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:54,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:54,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:54,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 0 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:56,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:56,409 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:59:56,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:59:56,547 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-11-06 22:59:56,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:56,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:59:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 0 proven. 3105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:56,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:59:56,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-11-06 22:59:56,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-11-06 22:59:56,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-11-06 22:59:56,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-11-06 22:59:56,730 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 49 states. [2018-11-06 22:59:58,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:59:58,039 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-11-06 22:59:58,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-11-06 22:59:58,039 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 143 [2018-11-06 22:59:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:59:58,041 INFO L225 Difference]: With dead ends: 151 [2018-11-06 22:59:58,041 INFO L226 Difference]: Without dead ends: 147 [2018-11-06 22:59:58,042 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2018-11-06 22:59:58,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-11-06 22:59:58,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-11-06 22:59:58,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-11-06 22:59:58,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-11-06 22:59:58,046 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 143 [2018-11-06 22:59:58,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:59:58,047 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-11-06 22:59:58,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-11-06 22:59:58,047 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-11-06 22:59:58,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-11-06 22:59:58,048 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:59:58,048 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1, 1, 1, 1] [2018-11-06 22:59:58,048 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:59:58,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:59:58,048 INFO L82 PathProgramCache]: Analyzing trace with hash -711601459, now seen corresponding path program 46 times [2018-11-06 22:59:58,048 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:59:58,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:59:58,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:58,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:59:58,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:59:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:59:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:59:59,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:59:59,338 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 22:59:59,347 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:59:59,383 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:59:59,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:59:59,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:00,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:00,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-11-06 23:00:00,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-11-06 23:00:00,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-11-06 23:00:00,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-11-06 23:00:00,678 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 50 states. [2018-11-06 23:00:02,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:02,252 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-11-06 23:00:02,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-06 23:00:02,252 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 146 [2018-11-06 23:00:02,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:02,253 INFO L225 Difference]: With dead ends: 154 [2018-11-06 23:00:02,254 INFO L226 Difference]: Without dead ends: 150 [2018-11-06 23:00:02,254 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2018-11-06 23:00:02,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-11-06 23:00:02,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-11-06 23:00:02,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-11-06 23:00:02,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-11-06 23:00:02,259 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 146 [2018-11-06 23:00:02,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:02,259 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-11-06 23:00:02,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-11-06 23:00:02,259 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-11-06 23:00:02,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-11-06 23:00:02,260 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:02,260 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:02,260 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:02,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:02,260 INFO L82 PathProgramCache]: Analyzing trace with hash 2088201714, now seen corresponding path program 47 times [2018-11-06 23:00:02,260 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:02,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:02,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:02,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:00:02,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 0 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:03,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:03,683 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:00:03,692 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 23:00:03,986 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-11-06 23:00:03,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:00:03,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 0 proven. 3384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:04,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:04,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-11-06 23:00:04,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-11-06 23:00:04,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-11-06 23:00:04,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-11-06 23:00:04,152 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 51 states. [2018-11-06 23:00:05,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:05,626 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-11-06 23:00:05,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-06 23:00:05,626 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 149 [2018-11-06 23:00:05,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:05,628 INFO L225 Difference]: With dead ends: 157 [2018-11-06 23:00:05,628 INFO L226 Difference]: Without dead ends: 153 [2018-11-06 23:00:05,628 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2018-11-06 23:00:05,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-11-06 23:00:05,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-11-06 23:00:05,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-11-06 23:00:05,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-11-06 23:00:05,633 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 149 [2018-11-06 23:00:05,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:05,634 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-11-06 23:00:05,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-11-06 23:00:05,634 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-11-06 23:00:05,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-11-06 23:00:05,635 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:05,635 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:05,635 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:05,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:05,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1535327059, now seen corresponding path program 48 times [2018-11-06 23:00:05,635 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:05,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:05,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:05,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:00:05,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 0 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:07,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:07,638 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:00:07,646 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 23:00:07,720 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-11-06 23:00:07,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:00:07,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 0 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:07,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:07,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-11-06 23:00:07,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-06 23:00:07,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-06 23:00:07,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-11-06 23:00:07,853 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 52 states. [2018-11-06 23:00:09,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:09,453 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-11-06 23:00:09,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-06 23:00:09,454 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 152 [2018-11-06 23:00:09,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:09,455 INFO L225 Difference]: With dead ends: 160 [2018-11-06 23:00:09,455 INFO L226 Difference]: Without dead ends: 156 [2018-11-06 23:00:09,456 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2018-11-06 23:00:09,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-11-06 23:00:09,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-11-06 23:00:09,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-11-06 23:00:09,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-11-06 23:00:09,460 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 152 [2018-11-06 23:00:09,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:09,460 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-11-06 23:00:09,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-06 23:00:09,460 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-11-06 23:00:09,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-11-06 23:00:09,461 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:09,461 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:09,461 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:09,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:09,462 INFO L82 PathProgramCache]: Analyzing trace with hash -372985838, now seen corresponding path program 49 times [2018-11-06 23:00:09,462 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:09,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:09,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:09,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:00:09,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 0 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:10,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:10,943 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:00:10,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 23:00:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:10,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 0 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:11,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:11,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-11-06 23:00:11,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-11-06 23:00:11,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-11-06 23:00:11,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-11-06 23:00:11,132 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 53 states. [2018-11-06 23:00:12,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:12,674 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-11-06 23:00:12,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-11-06 23:00:12,675 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 155 [2018-11-06 23:00:12,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:12,676 INFO L225 Difference]: With dead ends: 163 [2018-11-06 23:00:12,677 INFO L226 Difference]: Without dead ends: 159 [2018-11-06 23:00:12,677 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2018-11-06 23:00:12,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-11-06 23:00:12,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-11-06 23:00:12,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-11-06 23:00:12,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-11-06 23:00:12,682 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 155 [2018-11-06 23:00:12,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:12,682 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-11-06 23:00:12,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-11-06 23:00:12,683 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-11-06 23:00:12,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-11-06 23:00:12,683 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:12,684 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:12,684 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:12,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:12,684 INFO L82 PathProgramCache]: Analyzing trace with hash 907988621, now seen corresponding path program 50 times [2018-11-06 23:00:12,684 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:12,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:12,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:12,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 23:00:12,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3825 backedges. 0 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:14,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:14,094 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:00:14,102 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 23:00:14,143 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 23:00:14,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:00:14,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3825 backedges. 0 proven. 3825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:14,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:14,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-11-06 23:00:14,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-11-06 23:00:14,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-11-06 23:00:14,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-11-06 23:00:14,293 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 54 states. [2018-11-06 23:00:16,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:16,022 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-11-06 23:00:16,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-06 23:00:16,022 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 158 [2018-11-06 23:00:16,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:16,024 INFO L225 Difference]: With dead ends: 166 [2018-11-06 23:00:16,024 INFO L226 Difference]: Without dead ends: 162 [2018-11-06 23:00:16,024 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2018-11-06 23:00:16,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-11-06 23:00:16,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-11-06 23:00:16,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-11-06 23:00:16,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-11-06 23:00:16,028 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 158 [2018-11-06 23:00:16,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:16,028 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-11-06 23:00:16,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-11-06 23:00:16,028 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-11-06 23:00:16,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-11-06 23:00:16,029 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:16,029 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:16,029 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:16,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:16,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1633671730, now seen corresponding path program 51 times [2018-11-06 23:00:16,029 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:16,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:16,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:16,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:00:16,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 0 proven. 3978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:17,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:17,610 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:00:17,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 23:00:17,693 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-11-06 23:00:17,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:00:17,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 0 proven. 3978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:17,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:17,862 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-11-06 23:00:17,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-11-06 23:00:17,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-11-06 23:00:17,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-11-06 23:00:17,864 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 55 states. [2018-11-06 23:00:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:19,627 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-11-06 23:00:19,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-11-06 23:00:19,628 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 161 [2018-11-06 23:00:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:19,629 INFO L225 Difference]: With dead ends: 169 [2018-11-06 23:00:19,629 INFO L226 Difference]: Without dead ends: 165 [2018-11-06 23:00:19,630 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2018-11-06 23:00:19,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-11-06 23:00:19,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-11-06 23:00:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-11-06 23:00:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-11-06 23:00:19,634 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 161 [2018-11-06 23:00:19,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:19,635 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-11-06 23:00:19,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-11-06 23:00:19,635 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-11-06 23:00:19,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-11-06 23:00:19,636 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:19,636 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:19,636 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:19,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:19,636 INFO L82 PathProgramCache]: Analyzing trace with hash -406196115, now seen corresponding path program 52 times [2018-11-06 23:00:19,636 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:19,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:19,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:19,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:00:19,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 0 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:21,106 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:21,106 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:00:21,115 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 23:00:21,157 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 23:00:21,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:00:21,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 0 proven. 4134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:21,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:21,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-11-06 23:00:21,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-11-06 23:00:21,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-11-06 23:00:21,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-11-06 23:00:21,390 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 56 states. [2018-11-06 23:00:23,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:23,109 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-11-06 23:00:23,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-11-06 23:00:23,109 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 164 [2018-11-06 23:00:23,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:23,110 INFO L225 Difference]: With dead ends: 172 [2018-11-06 23:00:23,110 INFO L226 Difference]: Without dead ends: 168 [2018-11-06 23:00:23,111 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2018-11-06 23:00:23,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-11-06 23:00:23,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-11-06 23:00:23,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-11-06 23:00:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-11-06 23:00:23,115 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 164 [2018-11-06 23:00:23,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:23,115 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-11-06 23:00:23,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-11-06 23:00:23,115 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-11-06 23:00:23,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-11-06 23:00:23,116 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:23,116 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:23,116 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:23,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:23,116 INFO L82 PathProgramCache]: Analyzing trace with hash -616895406, now seen corresponding path program 53 times [2018-11-06 23:00:23,116 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:23,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:23,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:23,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:00:23,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 0 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:24,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:24,758 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:00:24,766 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 23:00:24,845 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-11-06 23:00:24,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:00:24,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 0 proven. 4293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:25,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:25,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-11-06 23:00:25,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-11-06 23:00:25,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-11-06 23:00:25,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-11-06 23:00:25,070 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 57 states. [2018-11-06 23:00:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:26,858 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-11-06 23:00:26,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-11-06 23:00:26,858 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 167 [2018-11-06 23:00:26,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:26,859 INFO L225 Difference]: With dead ends: 175 [2018-11-06 23:00:26,860 INFO L226 Difference]: Without dead ends: 171 [2018-11-06 23:00:26,860 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2018-11-06 23:00:26,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-11-06 23:00:26,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-11-06 23:00:26,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-11-06 23:00:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-11-06 23:00:26,864 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 167 [2018-11-06 23:00:26,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:26,864 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-11-06 23:00:26,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-11-06 23:00:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-11-06 23:00:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-11-06 23:00:26,865 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:26,865 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:26,866 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:26,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:26,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1682713165, now seen corresponding path program 54 times [2018-11-06 23:00:26,866 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:26,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:26,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:26,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:00:26,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 0 proven. 4455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:28,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:28,591 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:00:28,602 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 23:00:28,682 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-11-06 23:00:28,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:00:28,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 0 proven. 4455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:28,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:28,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-11-06 23:00:28,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-11-06 23:00:28,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-11-06 23:00:28,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-11-06 23:00:28,869 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 58 states. [2018-11-06 23:00:30,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:30,726 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-11-06 23:00:30,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-11-06 23:00:30,727 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 170 [2018-11-06 23:00:30,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:30,728 INFO L225 Difference]: With dead ends: 178 [2018-11-06 23:00:30,728 INFO L226 Difference]: Without dead ends: 174 [2018-11-06 23:00:30,729 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2018-11-06 23:00:30,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-11-06 23:00:30,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-11-06 23:00:30,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-11-06 23:00:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-11-06 23:00:30,733 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 170 [2018-11-06 23:00:30,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:30,733 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-11-06 23:00:30,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-11-06 23:00:30,733 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-11-06 23:00:30,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-11-06 23:00:30,734 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:30,734 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:30,734 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:30,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:30,734 INFO L82 PathProgramCache]: Analyzing trace with hash 298313330, now seen corresponding path program 55 times [2018-11-06 23:00:30,734 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:30,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:30,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:30,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:00:30,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 0 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:32,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:32,407 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:00:32,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 23:00:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:32,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 0 proven. 4620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:32,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:32,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-11-06 23:00:32,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-11-06 23:00:32,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-11-06 23:00:32,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-11-06 23:00:32,606 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 59 states. [2018-11-06 23:00:34,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:34,604 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-11-06 23:00:34,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-11-06 23:00:34,605 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 173 [2018-11-06 23:00:34,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:34,606 INFO L225 Difference]: With dead ends: 181 [2018-11-06 23:00:34,606 INFO L226 Difference]: Without dead ends: 177 [2018-11-06 23:00:34,607 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2018-11-06 23:00:34,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-11-06 23:00:34,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-11-06 23:00:34,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-11-06 23:00:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-11-06 23:00:34,611 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 173 [2018-11-06 23:00:34,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:34,611 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-11-06 23:00:34,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-11-06 23:00:34,611 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-11-06 23:00:34,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-11-06 23:00:34,612 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:34,612 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:34,612 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:34,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:34,612 INFO L82 PathProgramCache]: Analyzing trace with hash -2081194963, now seen corresponding path program 56 times [2018-11-06 23:00:34,613 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:34,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:34,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:34,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 23:00:34,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4788 backedges. 0 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:36,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:36,310 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:00:36,319 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 23:00:36,365 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 23:00:36,366 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:00:36,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4788 backedges. 0 proven. 4788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:36,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:36,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-11-06 23:00:36,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-11-06 23:00:36,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-11-06 23:00:36,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-11-06 23:00:36,539 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 60 states. [2018-11-06 23:00:38,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:38,533 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2018-11-06 23:00:38,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-11-06 23:00:38,533 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 176 [2018-11-06 23:00:38,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:38,534 INFO L225 Difference]: With dead ends: 184 [2018-11-06 23:00:38,534 INFO L226 Difference]: Without dead ends: 180 [2018-11-06 23:00:38,535 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2018-11-06 23:00:38,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-11-06 23:00:38,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2018-11-06 23:00:38,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-11-06 23:00:38,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2018-11-06 23:00:38,540 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 176 [2018-11-06 23:00:38,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:38,540 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2018-11-06 23:00:38,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-11-06 23:00:38,540 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2018-11-06 23:00:38,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-11-06 23:00:38,541 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:38,541 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:38,541 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:38,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:38,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1577531246, now seen corresponding path program 57 times [2018-11-06 23:00:38,542 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:38,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:38,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:38,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:00:38,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 0 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:40,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:40,359 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:00:40,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 23:00:40,745 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-11-06 23:00:40,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:00:40,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 0 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:40,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:40,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-11-06 23:00:40,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-11-06 23:00:40,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-11-06 23:00:40,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-11-06 23:00:40,881 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand 61 states. [2018-11-06 23:00:42,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:42,930 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-11-06 23:00:42,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-11-06 23:00:42,930 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 179 [2018-11-06 23:00:42,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:42,932 INFO L225 Difference]: With dead ends: 187 [2018-11-06 23:00:42,932 INFO L226 Difference]: Without dead ends: 183 [2018-11-06 23:00:42,933 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2018-11-06 23:00:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-11-06 23:00:42,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-11-06 23:00:42,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-11-06 23:00:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-11-06 23:00:42,937 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 179 [2018-11-06 23:00:42,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:42,938 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-11-06 23:00:42,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-11-06 23:00:42,938 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-11-06 23:00:42,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-11-06 23:00:42,939 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:42,939 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:42,939 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:42,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:42,939 INFO L82 PathProgramCache]: Analyzing trace with hash 747496973, now seen corresponding path program 58 times [2018-11-06 23:00:42,940 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:42,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:42,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:42,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:00:42,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5133 backedges. 0 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:45,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:45,168 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:00:45,177 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 23:00:45,228 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 23:00:45,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:00:45,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5133 backedges. 0 proven. 5133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:46,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:46,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-11-06 23:00:46,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-11-06 23:00:46,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-11-06 23:00:46,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-11-06 23:00:46,221 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 62 states. [2018-11-06 23:00:48,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:48,333 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2018-11-06 23:00:48,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-11-06 23:00:48,333 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 182 [2018-11-06 23:00:48,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:48,335 INFO L225 Difference]: With dead ends: 190 [2018-11-06 23:00:48,335 INFO L226 Difference]: Without dead ends: 186 [2018-11-06 23:00:48,336 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2018-11-06 23:00:48,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-11-06 23:00:48,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-11-06 23:00:48,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-11-06 23:00:48,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2018-11-06 23:00:48,341 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 182 [2018-11-06 23:00:48,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:48,341 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2018-11-06 23:00:48,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-11-06 23:00:48,342 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2018-11-06 23:00:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-11-06 23:00:48,342 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:48,343 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:48,343 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:48,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:48,343 INFO L82 PathProgramCache]: Analyzing trace with hash 725586610, now seen corresponding path program 59 times [2018-11-06 23:00:48,343 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:48,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:48,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:48,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:00:48,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5310 backedges. 0 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:50,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:50,196 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:00:50,203 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 23:00:50,283 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-11-06 23:00:50,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:00:50,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5310 backedges. 0 proven. 5310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:50,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:50,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-11-06 23:00:50,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-11-06 23:00:50,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-11-06 23:00:50,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-11-06 23:00:50,460 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand 63 states. [2018-11-06 23:00:52,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:52,655 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-11-06 23:00:52,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-11-06 23:00:52,655 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 185 [2018-11-06 23:00:52,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:52,657 INFO L225 Difference]: With dead ends: 193 [2018-11-06 23:00:52,657 INFO L226 Difference]: Without dead ends: 189 [2018-11-06 23:00:52,658 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2018-11-06 23:00:52,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-11-06 23:00:52,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-11-06 23:00:52,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-11-06 23:00:52,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-11-06 23:00:52,662 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 185 [2018-11-06 23:00:52,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:52,662 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-11-06 23:00:52,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-11-06 23:00:52,662 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-11-06 23:00:52,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-11-06 23:00:52,663 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:52,663 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:52,663 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:52,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:52,664 INFO L82 PathProgramCache]: Analyzing trace with hash 828991469, now seen corresponding path program 60 times [2018-11-06 23:00:52,664 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:52,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:52,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:52,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:00:52,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5490 backedges. 0 proven. 5490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:54,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:54,481 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:00:54,490 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 23:00:54,581 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-11-06 23:00:54,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:00:54,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5490 backedges. 0 proven. 5490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:54,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:54,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-11-06 23:00:54,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-11-06 23:00:54,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-11-06 23:00:54,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-11-06 23:00:54,771 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 64 states. [2018-11-06 23:00:57,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:57,035 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2018-11-06 23:00:57,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-11-06 23:00:57,035 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 188 [2018-11-06 23:00:57,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:57,037 INFO L225 Difference]: With dead ends: 196 [2018-11-06 23:00:57,037 INFO L226 Difference]: Without dead ends: 192 [2018-11-06 23:00:57,037 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2018-11-06 23:00:57,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-11-06 23:00:57,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-11-06 23:00:57,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-11-06 23:00:57,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2018-11-06 23:00:57,042 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 188 [2018-11-06 23:00:57,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:57,042 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2018-11-06 23:00:57,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-11-06 23:00:57,042 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2018-11-06 23:00:57,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-11-06 23:00:57,043 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:57,043 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:57,043 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:57,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:57,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1871594706, now seen corresponding path program 61 times [2018-11-06 23:00:57,044 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:57,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:57,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:57,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:00:57,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5673 backedges. 0 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:59,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:59,202 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:00:59,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 23:00:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:59,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5673 backedges. 0 proven. 5673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:59,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:59,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-11-06 23:00:59,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-11-06 23:00:59,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-11-06 23:00:59,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-11-06 23:00:59,420 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 65 states. [2018-11-06 23:01:01,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:01:01,750 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-11-06 23:01:01,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-11-06 23:01:01,751 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 191 [2018-11-06 23:01:01,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:01:01,752 INFO L225 Difference]: With dead ends: 199 [2018-11-06 23:01:01,752 INFO L226 Difference]: Without dead ends: 195 [2018-11-06 23:01:01,753 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2018-11-06 23:01:01,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-11-06 23:01:01,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-11-06 23:01:01,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-11-06 23:01:01,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-11-06 23:01:01,756 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 191 [2018-11-06 23:01:01,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:01:01,756 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-11-06 23:01:01,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-11-06 23:01:01,756 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-11-06 23:01:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-11-06 23:01:01,757 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:01:01,757 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 1, 1, 1, 1, 1, 1] [2018-11-06 23:01:01,757 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:01:01,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:01:01,758 INFO L82 PathProgramCache]: Analyzing trace with hash 861143501, now seen corresponding path program 62 times [2018-11-06 23:01:01,758 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:01:01,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:01:01,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:01,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 23:01:01,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:01:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 0 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:03,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:01:03,691 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:01:03,704 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 23:01:03,753 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 23:01:03,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:01:03,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:01:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 0 proven. 5859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:03,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:01:03,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-11-06 23:01:03,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-11-06 23:01:03,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-11-06 23:01:03,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-11-06 23:01:03,921 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 66 states. [2018-11-06 23:01:06,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:01:06,317 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2018-11-06 23:01:06,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-11-06 23:01:06,317 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 194 [2018-11-06 23:01:06,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:01:06,319 INFO L225 Difference]: With dead ends: 202 [2018-11-06 23:01:06,319 INFO L226 Difference]: Without dead ends: 198 [2018-11-06 23:01:06,320 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2018-11-06 23:01:06,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-11-06 23:01:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-11-06 23:01:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-11-06 23:01:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2018-11-06 23:01:06,325 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 194 [2018-11-06 23:01:06,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:01:06,325 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2018-11-06 23:01:06,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-11-06 23:01:06,325 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2018-11-06 23:01:06,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-11-06 23:01:06,326 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:01:06,326 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 1, 1, 1, 1, 1, 1] [2018-11-06 23:01:06,326 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:01:06,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:01:06,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1935073010, now seen corresponding path program 63 times [2018-11-06 23:01:06,327 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:01:06,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:01:06,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:06,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:01:06,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:01:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 0 proven. 6048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:08,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:01:08,402 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:01:08,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 23:01:08,531 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-11-06 23:01:08,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:01:08,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:01:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 0 proven. 6048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:08,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:01:08,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-11-06 23:01:08,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-11-06 23:01:08,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-11-06 23:01:08,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-11-06 23:01:08,690 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 67 states. [2018-11-06 23:01:11,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:01:11,169 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-11-06 23:01:11,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-11-06 23:01:11,170 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 197 [2018-11-06 23:01:11,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:01:11,171 INFO L225 Difference]: With dead ends: 205 [2018-11-06 23:01:11,171 INFO L226 Difference]: Without dead ends: 201 [2018-11-06 23:01:11,171 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 196 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2018-11-06 23:01:11,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-11-06 23:01:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-11-06 23:01:11,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-11-06 23:01:11,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-11-06 23:01:11,177 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 197 [2018-11-06 23:01:11,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:01:11,177 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-11-06 23:01:11,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-11-06 23:01:11,177 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-11-06 23:01:11,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-11-06 23:01:11,178 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:01:11,178 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1, 1, 1, 1] [2018-11-06 23:01:11,178 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:01:11,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:01:11,179 INFO L82 PathProgramCache]: Analyzing trace with hash -2137279571, now seen corresponding path program 64 times [2018-11-06 23:01:11,179 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:01:11,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:01:11,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:11,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:01:11,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:01:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 0 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:13,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:01:13,227 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:01:13,235 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 23:01:13,284 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 23:01:13,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:01:13,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:01:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 0 proven. 6240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:13,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:01:13,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-11-06 23:01:13,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-11-06 23:01:13,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-11-06 23:01:13,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-11-06 23:01:13,494 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 68 states. [2018-11-06 23:01:16,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:01:16,042 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2018-11-06 23:01:16,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-11-06 23:01:16,042 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 200 [2018-11-06 23:01:16,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:01:16,044 INFO L225 Difference]: With dead ends: 208 [2018-11-06 23:01:16,044 INFO L226 Difference]: Without dead ends: 204 [2018-11-06 23:01:16,044 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2018-11-06 23:01:16,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-11-06 23:01:16,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2018-11-06 23:01:16,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-11-06 23:01:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 204 transitions. [2018-11-06 23:01:16,048 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 204 transitions. Word has length 200 [2018-11-06 23:01:16,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:01:16,049 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 204 transitions. [2018-11-06 23:01:16,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-11-06 23:01:16,049 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 204 transitions. [2018-11-06 23:01:16,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-11-06 23:01:16,049 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:01:16,050 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 1, 1, 1, 1, 1, 1] [2018-11-06 23:01:16,050 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:01:16,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:01:16,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1651810030, now seen corresponding path program 65 times [2018-11-06 23:01:16,050 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:01:16,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:01:16,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:16,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:01:16,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:01:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 0 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:18,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:01:18,162 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:01:18,170 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 23:01:18,258 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-11-06 23:01:18,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:01:18,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:01:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 0 proven. 6435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:18,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:01:18,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-11-06 23:01:18,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-11-06 23:01:18,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-11-06 23:01:18,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-11-06 23:01:18,429 INFO L87 Difference]: Start difference. First operand 204 states and 204 transitions. Second operand 69 states. [2018-11-06 23:01:21,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:01:21,060 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-11-06 23:01:21,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-11-06 23:01:21,060 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 203 [2018-11-06 23:01:21,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:01:21,062 INFO L225 Difference]: With dead ends: 211 [2018-11-06 23:01:21,062 INFO L226 Difference]: Without dead ends: 207 [2018-11-06 23:01:21,062 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2018-11-06 23:01:21,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-11-06 23:01:21,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-11-06 23:01:21,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-11-06 23:01:21,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-11-06 23:01:21,068 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 203 [2018-11-06 23:01:21,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:01:21,068 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-11-06 23:01:21,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-11-06 23:01:21,068 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-11-06 23:01:21,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-11-06 23:01:21,069 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:01:21,069 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 1, 1, 1, 1, 1, 1] [2018-11-06 23:01:21,070 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:01:21,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:01:21,070 INFO L82 PathProgramCache]: Analyzing trace with hash -183599731, now seen corresponding path program 66 times [2018-11-06 23:01:21,070 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:01:21,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:01:21,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:21,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:01:21,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:01:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 0 proven. 6633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:23,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:01:23,282 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:01:23,290 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 23:01:23,394 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-11-06 23:01:23,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:01:23,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:01:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 0 proven. 6633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:23,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:01:23,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-11-06 23:01:23,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-11-06 23:01:23,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-11-06 23:01:23,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-11-06 23:01:23,570 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 70 states. [2018-11-06 23:01:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:01:26,272 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2018-11-06 23:01:26,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-11-06 23:01:26,272 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 206 [2018-11-06 23:01:26,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:01:26,274 INFO L225 Difference]: With dead ends: 214 [2018-11-06 23:01:26,274 INFO L226 Difference]: Without dead ends: 210 [2018-11-06 23:01:26,274 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 205 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2018-11-06 23:01:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-11-06 23:01:26,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-11-06 23:01:26,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-11-06 23:01:26,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2018-11-06 23:01:26,279 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 206 [2018-11-06 23:01:26,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:01:26,279 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2018-11-06 23:01:26,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-11-06 23:01:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2018-11-06 23:01:26,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-11-06 23:01:26,280 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:01:26,280 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 1, 1, 1, 1, 1, 1] [2018-11-06 23:01:26,280 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:01:26,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:01:26,280 INFO L82 PathProgramCache]: Analyzing trace with hash -677524686, now seen corresponding path program 67 times [2018-11-06 23:01:26,281 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:01:26,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:01:26,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:26,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:01:26,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:01:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 0 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:28,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:01:28,645 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:01:28,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 23:01:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:01:28,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:01:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 0 proven. 6834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:29,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:01:29,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-11-06 23:01:29,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-11-06 23:01:29,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-11-06 23:01:29,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-11-06 23:01:29,003 INFO L87 Difference]: Start difference. First operand 210 states and 210 transitions. Second operand 71 states. [2018-11-06 23:01:31,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:01:31,777 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-11-06 23:01:31,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-11-06 23:01:31,777 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 209 [2018-11-06 23:01:31,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:01:31,779 INFO L225 Difference]: With dead ends: 217 [2018-11-06 23:01:31,779 INFO L226 Difference]: Without dead ends: 213 [2018-11-06 23:01:31,779 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 208 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2018-11-06 23:01:31,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-11-06 23:01:31,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-11-06 23:01:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-11-06 23:01:31,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-11-06 23:01:31,786 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 209 [2018-11-06 23:01:31,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:01:31,786 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-11-06 23:01:31,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-11-06 23:01:31,786 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-11-06 23:01:31,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-11-06 23:01:31,787 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:01:31,787 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 1, 1, 1, 1, 1, 1] [2018-11-06 23:01:31,788 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:01:31,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:01:31,788 INFO L82 PathProgramCache]: Analyzing trace with hash -637902995, now seen corresponding path program 68 times [2018-11-06 23:01:31,788 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:01:31,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:01:31,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:31,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 23:01:31,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:01:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 0 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:34,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:01:34,092 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:01:34,100 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 23:01:34,155 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 23:01:34,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:01:34,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:01:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 0 proven. 7038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:34,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:01:34,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-11-06 23:01:34,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-11-06 23:01:34,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-11-06 23:01:34,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-11-06 23:01:34,350 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 72 states. [2018-11-06 23:01:37,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:01:37,213 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2018-11-06 23:01:37,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-11-06 23:01:37,213 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 212 [2018-11-06 23:01:37,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:01:37,215 INFO L225 Difference]: With dead ends: 220 [2018-11-06 23:01:37,215 INFO L226 Difference]: Without dead ends: 216 [2018-11-06 23:01:37,215 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2018-11-06 23:01:37,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-11-06 23:01:37,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-11-06 23:01:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-11-06 23:01:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 216 transitions. [2018-11-06 23:01:37,220 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 216 transitions. Word has length 212 [2018-11-06 23:01:37,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:01:37,221 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 216 transitions. [2018-11-06 23:01:37,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-11-06 23:01:37,221 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 216 transitions. [2018-11-06 23:01:37,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-11-06 23:01:37,222 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:01:37,222 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1, 1, 1, 1] [2018-11-06 23:01:37,222 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:01:37,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:01:37,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1384112814, now seen corresponding path program 69 times [2018-11-06 23:01:37,223 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:01:37,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:01:37,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:37,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:01:37,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:01:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7245 backedges. 0 proven. 7245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:39,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:01:39,579 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:01:39,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 23:01:39,697 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-11-06 23:01:39,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:01:39,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:01:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7245 backedges. 0 proven. 7245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:39,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:01:39,886 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-11-06 23:01:39,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-11-06 23:01:39,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-11-06 23:01:39,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-11-06 23:01:39,887 INFO L87 Difference]: Start difference. First operand 216 states and 216 transitions. Second operand 73 states. [2018-11-06 23:01:42,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:01:42,822 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-11-06 23:01:42,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-11-06 23:01:42,823 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 215 [2018-11-06 23:01:42,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:01:42,824 INFO L225 Difference]: With dead ends: 223 [2018-11-06 23:01:42,824 INFO L226 Difference]: Without dead ends: 219 [2018-11-06 23:01:42,825 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 214 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=147, Invalid=5255, Unknown=0, NotChecked=0, Total=5402 [2018-11-06 23:01:42,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-11-06 23:01:42,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-11-06 23:01:42,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-11-06 23:01:42,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-11-06 23:01:42,829 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 215 [2018-11-06 23:01:42,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:01:42,830 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-11-06 23:01:42,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-11-06 23:01:42,830 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-11-06 23:01:42,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-11-06 23:01:42,831 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:01:42,831 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 70, 1, 1, 1, 1, 1, 1] [2018-11-06 23:01:42,831 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:01:42,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:01:42,831 INFO L82 PathProgramCache]: Analyzing trace with hash -970106547, now seen corresponding path program 70 times [2018-11-06 23:01:42,831 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:01:42,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:01:42,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:42,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:01:42,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:01:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7455 backedges. 0 proven. 7455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:45,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:01:45,231 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:01:45,239 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 23:01:45,289 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 23:01:45,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:01:45,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:01:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7455 backedges. 0 proven. 7455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:45,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:01:45,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-11-06 23:01:45,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-11-06 23:01:45,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-11-06 23:01:45,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-11-06 23:01:45,476 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 74 states. [2018-11-06 23:01:48,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:01:48,507 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2018-11-06 23:01:48,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-11-06 23:01:48,507 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 218 [2018-11-06 23:01:48,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:01:48,508 INFO L225 Difference]: With dead ends: 226 [2018-11-06 23:01:48,509 INFO L226 Difference]: Without dead ends: 222 [2018-11-06 23:01:48,509 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2018-11-06 23:01:48,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-11-06 23:01:48,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2018-11-06 23:01:48,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-11-06 23:01:48,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 222 transitions. [2018-11-06 23:01:48,513 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 222 transitions. Word has length 218 [2018-11-06 23:01:48,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:01:48,513 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 222 transitions. [2018-11-06 23:01:48,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-11-06 23:01:48,513 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 222 transitions. [2018-11-06 23:01:48,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-11-06 23:01:48,514 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:01:48,514 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 71, 1, 1, 1, 1, 1, 1] [2018-11-06 23:01:48,514 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:01:48,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:01:48,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1839486834, now seen corresponding path program 71 times [2018-11-06 23:01:48,515 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:01:48,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:01:48,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:48,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:01:48,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:01:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7668 backedges. 0 proven. 7668 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:51,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:01:51,078 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:01:51,086 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 23:01:51,195 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-11-06 23:01:51,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:01:51,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:01:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7668 backedges. 0 proven. 7668 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:51,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:01:51,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-11-06 23:01:51,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-11-06 23:01:51,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-11-06 23:01:51,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-11-06 23:01:51,382 INFO L87 Difference]: Start difference. First operand 222 states and 222 transitions. Second operand 75 states. [2018-11-06 23:01:54,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:01:54,504 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-11-06 23:01:54,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-11-06 23:01:54,504 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 221 [2018-11-06 23:01:54,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:01:54,506 INFO L225 Difference]: With dead ends: 229 [2018-11-06 23:01:54,506 INFO L226 Difference]: Without dead ends: 225 [2018-11-06 23:01:54,506 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=151, Invalid=5549, Unknown=0, NotChecked=0, Total=5700 [2018-11-06 23:01:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-11-06 23:01:54,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-11-06 23:01:54,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-11-06 23:01:54,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2018-11-06 23:01:54,511 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 221 [2018-11-06 23:01:54,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:01:54,511 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2018-11-06 23:01:54,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-11-06 23:01:54,512 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2018-11-06 23:01:54,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-11-06 23:01:54,512 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:01:54,512 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 72, 1, 1, 1, 1, 1, 1] [2018-11-06 23:01:54,513 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:01:54,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:01:54,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2113235757, now seen corresponding path program 72 times [2018-11-06 23:01:54,513 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:01:54,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:01:54,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:54,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:01:54,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:01:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7884 backedges. 0 proven. 7884 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:57,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:01:57,061 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:01:57,069 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 23:01:57,184 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-11-06 23:01:57,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:01:57,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:01:57,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7884 backedges. 0 proven. 7884 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:57,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:01:57,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-11-06 23:01:57,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-11-06 23:01:57,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-11-06 23:01:57,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-11-06 23:01:57,372 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand 76 states. [2018-11-06 23:02:00,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:02:00,549 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2018-11-06 23:02:00,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-11-06 23:02:00,550 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 224 [2018-11-06 23:02:00,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:02:00,551 INFO L225 Difference]: With dead ends: 232 [2018-11-06 23:02:00,551 INFO L226 Difference]: Without dead ends: 228 [2018-11-06 23:02:00,552 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 223 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2018-11-06 23:02:00,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-11-06 23:02:00,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-11-06 23:02:00,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-11-06 23:02:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2018-11-06 23:02:00,557 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 224 [2018-11-06 23:02:00,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:02:00,558 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2018-11-06 23:02:00,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-11-06 23:02:00,558 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2018-11-06 23:02:00,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-11-06 23:02:00,559 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:02:00,559 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 73, 1, 1, 1, 1, 1, 1] [2018-11-06 23:02:00,559 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:02:00,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:02:00,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1224505746, now seen corresponding path program 73 times [2018-11-06 23:02:00,560 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:02:00,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:02:00,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:02:00,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:02:00,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:02:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:02:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8103 backedges. 0 proven. 8103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:02:03,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:02:03,194 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:02:03,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 23:02:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:02:03,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:02:03,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8103 backedges. 0 proven. 8103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:02:03,451 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:02:03,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-11-06 23:02:03,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-11-06 23:02:03,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-11-06 23:02:03,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-11-06 23:02:03,452 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 77 states. [2018-11-06 23:02:06,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:02:06,729 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-11-06 23:02:06,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-11-06 23:02:06,730 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 227 [2018-11-06 23:02:06,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:02:06,731 INFO L225 Difference]: With dead ends: 235 [2018-11-06 23:02:06,731 INFO L226 Difference]: Without dead ends: 231 [2018-11-06 23:02:06,732 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 226 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=155, Invalid=5851, Unknown=0, NotChecked=0, Total=6006 [2018-11-06 23:02:06,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-11-06 23:02:06,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-11-06 23:02:06,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-11-06 23:02:06,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2018-11-06 23:02:06,737 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 227 [2018-11-06 23:02:06,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:02:06,737 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2018-11-06 23:02:06,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-11-06 23:02:06,738 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2018-11-06 23:02:06,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-11-06 23:02:06,739 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:02:06,739 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 74, 1, 1, 1, 1, 1, 1] [2018-11-06 23:02:06,739 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:02:06,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:02:06,739 INFO L82 PathProgramCache]: Analyzing trace with hash -752839411, now seen corresponding path program 74 times [2018-11-06 23:02:06,740 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:02:06,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:02:06,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:02:06,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 23:02:06,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:02:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:02:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8325 backedges. 0 proven. 8325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:02:09,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:02:09,402 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:02:09,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 23:02:09,462 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 23:02:09,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:02:09,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:02:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8325 backedges. 0 proven. 8325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:02:09,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:02:09,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-11-06 23:02:09,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-11-06 23:02:09,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-11-06 23:02:09,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-11-06 23:02:09,643 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 78 states. [2018-11-06 23:02:13,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:02:13,001 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2018-11-06 23:02:13,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-11-06 23:02:13,001 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 230 [2018-11-06 23:02:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:02:13,003 INFO L225 Difference]: With dead ends: 238 [2018-11-06 23:02:13,003 INFO L226 Difference]: Without dead ends: 234 [2018-11-06 23:02:13,003 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 229 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=157, Invalid=6005, Unknown=0, NotChecked=0, Total=6162 [2018-11-06 23:02:13,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-11-06 23:02:13,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2018-11-06 23:02:13,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-11-06 23:02:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 234 transitions. [2018-11-06 23:02:13,009 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 234 transitions. Word has length 230 [2018-11-06 23:02:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:02:13,010 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 234 transitions. [2018-11-06 23:02:13,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-11-06 23:02:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 234 transitions. [2018-11-06 23:02:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-11-06 23:02:13,011 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:02:13,011 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 75, 1, 1, 1, 1, 1, 1] [2018-11-06 23:02:13,011 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:02:13,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:02:13,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1929020338, now seen corresponding path program 75 times [2018-11-06 23:02:13,012 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:02:13,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:02:13,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:02:13,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:02:13,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:02:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:02:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 0 proven. 8550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:02:15,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:02:15,819 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:02:15,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 23:02:15,950 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-11-06 23:02:15,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:02:15,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:02:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 0 proven. 8550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:02:16,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:02:16,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-11-06 23:02:16,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-11-06 23:02:16,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-11-06 23:02:16,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-11-06 23:02:16,136 INFO L87 Difference]: Start difference. First operand 234 states and 234 transitions. Second operand 79 states. [2018-11-06 23:02:19,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:02:19,571 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-11-06 23:02:19,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-11-06 23:02:19,571 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 233 [2018-11-06 23:02:19,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:02:19,573 INFO L225 Difference]: With dead ends: 241 [2018-11-06 23:02:19,573 INFO L226 Difference]: Without dead ends: 237 [2018-11-06 23:02:19,573 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=159, Invalid=6161, Unknown=0, NotChecked=0, Total=6320 [2018-11-06 23:02:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-11-06 23:02:19,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-11-06 23:02:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-11-06 23:02:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2018-11-06 23:02:19,578 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 233 [2018-11-06 23:02:19,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:02:19,578 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2018-11-06 23:02:19,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-11-06 23:02:19,578 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2018-11-06 23:02:19,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-11-06 23:02:19,586 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:02:19,587 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 76, 1, 1, 1, 1, 1, 1] [2018-11-06 23:02:19,587 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:02:19,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:02:19,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2063804691, now seen corresponding path program 76 times [2018-11-06 23:02:19,587 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:02:19,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:02:19,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:02:19,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:02:19,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:02:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:02:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:02:22,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:02:22,579 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:02:22,588 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 23:02:22,642 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 23:02:22,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:02:22,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:02:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:02:22,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:02:22,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-11-06 23:02:22,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-11-06 23:02:22,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-11-06 23:02:22,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-11-06 23:02:22,848 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 80 states. [2018-11-06 23:02:26,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:02:26,390 INFO L93 Difference]: Finished difference Result 244 states and 244 transitions. [2018-11-06 23:02:26,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-11-06 23:02:26,390 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 236 [2018-11-06 23:02:26,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:02:26,392 INFO L225 Difference]: With dead ends: 244 [2018-11-06 23:02:26,392 INFO L226 Difference]: Without dead ends: 240 [2018-11-06 23:02:26,392 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 235 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=161, Invalid=6319, Unknown=0, NotChecked=0, Total=6480 [2018-11-06 23:02:26,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-11-06 23:02:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2018-11-06 23:02:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-11-06 23:02:26,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 240 transitions. [2018-11-06 23:02:26,398 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 240 transitions. Word has length 236 [2018-11-06 23:02:26,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:02:26,399 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 240 transitions. [2018-11-06 23:02:26,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-11-06 23:02:26,399 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 240 transitions. [2018-11-06 23:02:26,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-11-06 23:02:26,400 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:02:26,400 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 77, 1, 1, 1, 1, 1, 1] [2018-11-06 23:02:26,400 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:02:26,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:02:26,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1099986386, now seen corresponding path program 77 times [2018-11-06 23:02:26,401 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:02:26,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:02:26,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:02:26,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:02:26,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:02:26,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:02:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 0 proven. 9009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:02:29,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:02:29,281 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:02:29,289 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 23:02:29,402 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-11-06 23:02:29,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:02:29,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:02:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 0 proven. 9009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:02:29,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:02:29,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-11-06 23:02:29,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-11-06 23:02:29,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-11-06 23:02:29,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-11-06 23:02:29,592 INFO L87 Difference]: Start difference. First operand 240 states and 240 transitions. Second operand 81 states. [2018-11-06 23:02:33,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:02:33,226 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-11-06 23:02:33,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-11-06 23:02:33,226 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 239 [2018-11-06 23:02:33,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:02:33,228 INFO L225 Difference]: With dead ends: 247 [2018-11-06 23:02:33,228 INFO L226 Difference]: Without dead ends: 243 [2018-11-06 23:02:33,228 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 238 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=163, Invalid=6479, Unknown=0, NotChecked=0, Total=6642 [2018-11-06 23:02:33,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-11-06 23:02:33,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-11-06 23:02:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-11-06 23:02:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-11-06 23:02:33,233 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 239 [2018-11-06 23:02:33,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:02:33,233 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-11-06 23:02:33,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-11-06 23:02:33,233 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-11-06 23:02:33,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-11-06 23:02:33,234 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:02:33,235 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 78, 1, 1, 1, 1, 1, 1] [2018-11-06 23:02:33,235 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:02:33,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:02:33,235 INFO L82 PathProgramCache]: Analyzing trace with hash 542650573, now seen corresponding path program 78 times [2018-11-06 23:02:33,235 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:02:33,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:02:33,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:02:33,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:02:33,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:02:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:02:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 0 proven. 9243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:02:36,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:02:36,189 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-06 23:02:36,209 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 23:02:36,336 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-11-06 23:02:36,336 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:02:36,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:02:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 0 proven. 9243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:02:36,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:02:36,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-11-06 23:02:36,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-11-06 23:02:36,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-11-06 23:02:36,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-11-06 23:02:36,535 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 82 states. Received shutdown request... [2018-11-06 23:02:38,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-11-06 23:02:38,937 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-06 23:02:38,942 WARN L205 ceAbstractionStarter]: Timeout [2018-11-06 23:02:38,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 11:02:38 BoogieIcfgContainer [2018-11-06 23:02:38,943 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-06 23:02:38,943 INFO L168 Benchmark]: Toolchain (without parser) took 235799.91 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 652.7 MB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -208.1 MB). Peak memory consumption was 444.7 MB. Max. memory is 7.1 GB. [2018-11-06 23:02:38,944 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 23:02:38,945 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.08 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-11-06 23:02:38,945 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.54 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 23:02:38,945 INFO L168 Benchmark]: Boogie Preprocessor took 21.99 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 23:02:38,946 INFO L168 Benchmark]: RCFGBuilder took 317.96 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 752.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -805.6 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. [2018-11-06 23:02:38,946 INFO L168 Benchmark]: TraceAbstraction took 235155.13 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -100.1 MB). Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 587.0 MB). Peak memory consumption was 486.9 MB. Max. memory is 7.1 GB. [2018-11-06 23:02:38,949 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 264.08 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 36.54 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 21.99 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 317.96 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 752.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -805.6 MB). Peak memory consumption was 26.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235155.13 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -100.1 MB). Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 587.0 MB). Peak memory consumption was 486.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was constructing difference of abstraction (243states) and FLOYD_HOARE automaton (currently 55 states, 82 states before enhancement),while ReachableStatesComputation was computing reachable states (158 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. TIMEOUT Result, 235.0s OverallTime, 80 OverallIterations, 79 TraceHistogramMax, 108.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 6671 SDtfs, 78 SDslu, 343413 SDs, 0 SdLazy, 174954 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 86.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13266 GetRequests, 9793 SyntacticMatches, 156 SemanticMatches, 3317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 109.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=243occurred in iteration=79, 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, 79 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 4.9s SatisfiabilityAnalysisTime, 115.9s InterpolantComputationTime, 19748 NumberOfCodeBlocks, 19748 NumberOfCodeBlocksAsserted, 1770 NumberOfCheckSat, 19590 ConstructedInterpolants, 0 QuantifiedInterpolants, 21868258 SizeOfPredicates, 234 NumberOfNonLiveVariables, 19812 ConjunctsInSsa, 6786 ConjunctsInUnsatCore, 158 InterpolantComputations, 2 PerfectInterpolantSequences, 0/492960 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown