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-acceleration/array_false-unreach-call1_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 22:40:16,571 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 22:40:16,573 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 22:40:16,585 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 22:40:16,585 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 22:40:16,587 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 22:40:16,588 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 22:40:16,590 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 22:40:16,593 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 22:40:16,593 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 22:40:16,594 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 22:40:16,595 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 22:40:16,596 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 22:40:16,597 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 22:40:16,598 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 22:40:16,599 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 22:40:16,599 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 22:40:16,601 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 22:40:16,603 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 22:40:16,605 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 22:40:16,606 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 22:40:16,607 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 22:40:16,610 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-06 22:40:16,610 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-06 22:40:16,610 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-06 22:40:16,611 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-06 22:40:16,612 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-06 22:40:16,613 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-06 22:40:16,614 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-06 22:40:16,615 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-06 22:40:16,615 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-06 22:40:16,616 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-06 22:40:16,620 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 22:40:16,637 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 22:40:16,637 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 22:40:16,638 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 22:40:16,638 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 22:40:16,639 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 22:40:16,639 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 22:40:16,639 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 22:40:16,639 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 22:40:16,640 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 22:40:16,640 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 22:40:16,640 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 22:40:16,640 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 22:40:16,640 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 22:40:16,641 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 22:40:16,641 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 22:40:16,641 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 22:40:16,641 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 22:40:16,641 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 22:40:16,642 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 22:40:16,643 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:40:16,643 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 22:40:16,643 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 22:40:16,643 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 22:40:16,644 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 22:40:16,644 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 22:40:16,644 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 22:40:16,644 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 22:40:16,644 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 22:40:16,691 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 22:40:16,707 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 22:40:16,711 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 22:40:16,712 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 22:40:16,713 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 22:40:16,714 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_false-unreach-call1_true-termination.i [2018-11-06 22:40:16,773 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cee4e2cfa/1f4fe3d1250d4e91b7ca7f9d0e760495/FLAG074572b0c [2018-11-06 22:40:17,223 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 22:40:17,224 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_false-unreach-call1_true-termination.i [2018-11-06 22:40:17,233 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cee4e2cfa/1f4fe3d1250d4e91b7ca7f9d0e760495/FLAG074572b0c [2018-11-06 22:40:17,257 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cee4e2cfa/1f4fe3d1250d4e91b7ca7f9d0e760495 [2018-11-06 22:40:17,269 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 22:40:17,271 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 22:40:17,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 22:40:17,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 22:40:17,276 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 22:40:17,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:40:17" (1/1) ... [2018-11-06 22:40:17,279 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672c8373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:17, skipping insertion in model container [2018-11-06 22:40:17,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:40:17" (1/1) ... [2018-11-06 22:40:17,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 22:40:17,310 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 22:40:17,517 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:40:17,521 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 22:40:17,546 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:40:17,575 INFO L193 MainTranslator]: Completed translation [2018-11-06 22:40:17,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:17 WrapperNode [2018-11-06 22:40:17,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 22:40:17,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 22:40:17,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 22:40:17,577 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 22:40:17,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:17" (1/1) ... [2018-11-06 22:40:17,600 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:17" (1/1) ... [2018-11-06 22:40:17,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 22:40:17,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 22:40:17,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 22:40:17,625 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 22:40:17,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:17" (1/1) ... [2018-11-06 22:40:17,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:17" (1/1) ... [2018-11-06 22:40:17,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:17" (1/1) ... [2018-11-06 22:40:17,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:17" (1/1) ... [2018-11-06 22:40:17,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:17" (1/1) ... [2018-11-06 22:40:17,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:17" (1/1) ... [2018-11-06 22:40:17,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:17" (1/1) ... [2018-11-06 22:40:17,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 22:40:17,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 22:40:17,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 22:40:17,654 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 22:40:17,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:17" (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 22:40:17,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-06 22:40:17,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-06 22:40:17,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 22:40:17,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 22:40:17,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-06 22:40:17,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-06 22:40:18,095 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 22:40:18,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:40:18 BoogieIcfgContainer [2018-11-06 22:40:18,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 22:40:18,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 22:40:18,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 22:40:18,100 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 22:40:18,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:40:17" (1/3) ... [2018-11-06 22:40:18,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10922a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:40:18, skipping insertion in model container [2018-11-06 22:40:18,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:17" (2/3) ... [2018-11-06 22:40:18,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10922a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:40:18, skipping insertion in model container [2018-11-06 22:40:18,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:40:18" (3/3) ... [2018-11-06 22:40:18,104 INFO L112 eAbstractionObserver]: Analyzing ICFG array_false-unreach-call1_true-termination.i [2018-11-06 22:40:18,115 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 22:40:18,125 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 22:40:18,143 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 22:40:18,180 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 22:40:18,181 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 22:40:18,181 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 22:40:18,181 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 22:40:18,181 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 22:40:18,181 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 22:40:18,182 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 22:40:18,182 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 22:40:18,182 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 22:40:18,198 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-06 22:40:18,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-06 22:40:18,204 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:18,205 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:18,208 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:18,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:18,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1788407665, now seen corresponding path program 1 times [2018-11-06 22:40:18,217 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:18,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:18,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:18,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:18,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:18,347 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 22:40:18,349 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:40:18,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 22:40:18,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-06 22:40:18,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-06 22:40:18,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:40:18,369 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-11-06 22:40:18,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:18,386 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-11-06 22:40:18,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-06 22:40:18,388 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-11-06 22:40:18,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:18,402 INFO L225 Difference]: With dead ends: 30 [2018-11-06 22:40:18,403 INFO L226 Difference]: Without dead ends: 13 [2018-11-06 22:40:18,407 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 22:40:18,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-11-06 22:40:18,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-11-06 22:40:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-11-06 22:40:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-11-06 22:40:18,443 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 9 [2018-11-06 22:40:18,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:18,443 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-11-06 22:40:18,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-06 22:40:18,444 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-11-06 22:40:18,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-06 22:40:18,444 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:18,444 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:18,445 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:18,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:18,445 INFO L82 PathProgramCache]: Analyzing trace with hash -688573142, now seen corresponding path program 1 times [2018-11-06 22:40:18,445 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:18,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:18,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:18,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:18,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:18,513 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 22:40:18,514 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:40:18,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 22:40:18,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 22:40:18,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 22:40:18,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:40:18,517 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2018-11-06 22:40:18,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:18,580 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-11-06 22:40:18,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 22:40:18,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-11-06 22:40:18,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:18,582 INFO L225 Difference]: With dead ends: 22 [2018-11-06 22:40:18,582 INFO L226 Difference]: Without dead ends: 17 [2018-11-06 22:40:18,584 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:40:18,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-11-06 22:40:18,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2018-11-06 22:40:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-06 22:40:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-11-06 22:40:18,588 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2018-11-06 22:40:18,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:18,588 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-11-06 22:40:18,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 22:40:18,589 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-11-06 22:40:18,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-06 22:40:18,589 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:18,590 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:18,590 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:18,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:18,591 INFO L82 PathProgramCache]: Analyzing trace with hash -699549839, now seen corresponding path program 1 times [2018-11-06 22:40:18,591 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:18,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:18,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:18,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:18,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:18,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:18,675 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 22:40:18,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:18,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:18,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:18,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-11-06 22:40:18,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 22:40:18,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 22:40:18,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:40:18,796 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2018-11-06 22:40:18,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:18,851 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-11-06 22:40:18,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 22:40:18,852 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-06 22:40:18,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:18,854 INFO L225 Difference]: With dead ends: 26 [2018-11-06 22:40:18,854 INFO L226 Difference]: Without dead ends: 21 [2018-11-06 22:40:18,855 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:40:18,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-06 22:40:18,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2018-11-06 22:40:18,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-06 22:40:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-11-06 22:40:18,859 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2018-11-06 22:40:18,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:18,859 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-11-06 22:40:18,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 22:40:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-11-06 22:40:18,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-06 22:40:18,860 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:18,860 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:18,861 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:18,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:18,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1786921416, now seen corresponding path program 2 times [2018-11-06 22:40:18,861 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:18,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:18,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:18,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:18,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:18,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:18,985 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 22:40:19,000 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:40:19,023 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:40:19,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:19,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:19,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:19,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-11-06 22:40:19,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 22:40:19,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 22:40:19,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:40:19,069 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 6 states. [2018-11-06 22:40:19,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:19,299 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-11-06 22:40:19,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 22:40:19,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-11-06 22:40:19,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:19,301 INFO L225 Difference]: With dead ends: 30 [2018-11-06 22:40:19,302 INFO L226 Difference]: Without dead ends: 25 [2018-11-06 22:40:19,302 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-06 22:40:19,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-06 22:40:19,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2018-11-06 22:40:19,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-06 22:40:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-11-06 22:40:19,308 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2018-11-06 22:40:19,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:19,310 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-11-06 22:40:19,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 22:40:19,310 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-11-06 22:40:19,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-06 22:40:19,311 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:19,311 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:19,311 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:19,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:19,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1674638977, now seen corresponding path program 3 times [2018-11-06 22:40:19,312 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:19,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:19,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:19,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:19,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:19,483 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 22:40:19,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:19,484 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 22:40:19,498 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:40:19,535 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-06 22:40:19,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:19,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:19,565 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 22:40:19,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:19,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-11-06 22:40:19,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 22:40:19,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 22:40:19,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:40:19,586 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2018-11-06 22:40:19,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:19,741 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-11-06 22:40:19,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 22:40:19,742 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-11-06 22:40:19,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:19,743 INFO L225 Difference]: With dead ends: 34 [2018-11-06 22:40:19,744 INFO L226 Difference]: Without dead ends: 29 [2018-11-06 22:40:19,745 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:40:19,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-06 22:40:19,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2018-11-06 22:40:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-06 22:40:19,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-11-06 22:40:19,750 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 22 [2018-11-06 22:40:19,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:19,750 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-11-06 22:40:19,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 22:40:19,750 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-11-06 22:40:19,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-06 22:40:19,751 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:19,751 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:19,751 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:19,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:19,752 INFO L82 PathProgramCache]: Analyzing trace with hash 120281414, now seen corresponding path program 4 times [2018-11-06 22:40:19,752 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:19,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:19,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:19,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:19,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:19,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:19,958 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 22:40:19,975 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:40:20,008 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:40:20,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:20,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:20,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:20,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-06 22:40:20,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-06 22:40:20,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-06 22:40:20,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:40:20,083 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2018-11-06 22:40:20,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:20,168 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-11-06 22:40:20,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 22:40:20,169 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-11-06 22:40:20,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:20,171 INFO L225 Difference]: With dead ends: 38 [2018-11-06 22:40:20,171 INFO L226 Difference]: Without dead ends: 33 [2018-11-06 22:40:20,172 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:40:20,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-06 22:40:20,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2018-11-06 22:40:20,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-06 22:40:20,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-11-06 22:40:20,178 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 26 [2018-11-06 22:40:20,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:20,179 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-11-06 22:40:20,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-06 22:40:20,179 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-11-06 22:40:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-06 22:40:20,180 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:20,180 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:20,180 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:20,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:20,181 INFO L82 PathProgramCache]: Analyzing trace with hash -128160371, now seen corresponding path program 5 times [2018-11-06 22:40:20,181 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:20,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:20,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:20,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:20,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:20,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:20,306 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 22:40:20,316 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:40:20,346 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-11-06 22:40:20,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:20,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:20,399 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:20,399 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-06 22:40:20,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 22:40:20,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 22:40:20,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:40:20,401 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 9 states. [2018-11-06 22:40:20,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:20,736 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-11-06 22:40:20,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-06 22:40:20,739 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2018-11-06 22:40:20,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:20,740 INFO L225 Difference]: With dead ends: 42 [2018-11-06 22:40:20,740 INFO L226 Difference]: Without dead ends: 37 [2018-11-06 22:40:20,741 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:40:20,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-11-06 22:40:20,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2018-11-06 22:40:20,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-06 22:40:20,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-11-06 22:40:20,747 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 30 [2018-11-06 22:40:20,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:20,747 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-11-06 22:40:20,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 22:40:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-11-06 22:40:20,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-06 22:40:20,749 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:20,749 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:20,749 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:20,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:20,749 INFO L82 PathProgramCache]: Analyzing trace with hash 114034260, now seen corresponding path program 6 times [2018-11-06 22:40:20,750 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:20,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:20,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:20,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:20,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:20,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:20,870 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 22:40:20,884 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:40:20,917 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-11-06 22:40:20,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:20,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:20,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:20,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-06 22:40:20,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 22:40:20,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 22:40:20,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:40:20,960 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 10 states. [2018-11-06 22:40:21,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:21,058 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-11-06 22:40:21,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-06 22:40:21,058 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-11-06 22:40:21,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:21,060 INFO L225 Difference]: With dead ends: 46 [2018-11-06 22:40:21,060 INFO L226 Difference]: Without dead ends: 41 [2018-11-06 22:40:21,061 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:40:21,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-06 22:40:21,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2018-11-06 22:40:21,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-06 22:40:21,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-11-06 22:40:21,067 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 34 [2018-11-06 22:40:21,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:21,068 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-11-06 22:40:21,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 22:40:21,068 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-11-06 22:40:21,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-06 22:40:21,069 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:21,069 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:21,070 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:21,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:21,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1364991077, now seen corresponding path program 7 times [2018-11-06 22:40:21,070 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:21,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:21,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:21,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:21,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:21,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:21,392 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 22:40:21,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:21,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:21,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:21,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-06 22:40:21,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-06 22:40:21,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-06 22:40:21,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:40:21,478 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 11 states. [2018-11-06 22:40:21,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:21,794 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-11-06 22:40:21,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:40:21,795 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2018-11-06 22:40:21,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:21,796 INFO L225 Difference]: With dead ends: 50 [2018-11-06 22:40:21,796 INFO L226 Difference]: Without dead ends: 45 [2018-11-06 22:40:21,798 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:40:21,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-06 22:40:21,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2018-11-06 22:40:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-06 22:40:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-11-06 22:40:21,806 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 38 [2018-11-06 22:40:21,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:21,806 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-11-06 22:40:21,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-06 22:40:21,807 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-11-06 22:40:21,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-06 22:40:21,810 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:21,810 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:21,810 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:21,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:21,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1053964958, now seen corresponding path program 8 times [2018-11-06 22:40:21,812 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:21,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:21,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:21,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:21,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:22,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:22,049 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 22:40:22,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:40:22,087 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:40:22,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:22,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:22,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:22,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-06 22:40:22,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-06 22:40:22,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-06 22:40:22,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:40:22,146 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 12 states. [2018-11-06 22:40:22,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:22,294 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-11-06 22:40:22,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-06 22:40:22,294 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2018-11-06 22:40:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:22,296 INFO L225 Difference]: With dead ends: 54 [2018-11-06 22:40:22,296 INFO L226 Difference]: Without dead ends: 49 [2018-11-06 22:40:22,297 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:40:22,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-06 22:40:22,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2018-11-06 22:40:22,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-06 22:40:22,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-11-06 22:40:22,301 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 42 [2018-11-06 22:40:22,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:22,302 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-11-06 22:40:22,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-06 22:40:22,302 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-11-06 22:40:22,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-06 22:40:22,304 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:22,304 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:22,304 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:22,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:22,304 INFO L82 PathProgramCache]: Analyzing trace with hash -724341847, now seen corresponding path program 9 times [2018-11-06 22:40:22,305 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:22,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:22,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:22,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:22,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:22,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:22,480 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 22:40:22,489 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:40:22,635 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-06 22:40:22,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:22,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:22,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:22,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-06 22:40:22,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-06 22:40:22,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-06 22:40:22,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:40:22,802 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 13 states. [2018-11-06 22:40:23,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:23,059 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-11-06 22:40:23,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-06 22:40:23,061 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2018-11-06 22:40:23,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:23,062 INFO L225 Difference]: With dead ends: 58 [2018-11-06 22:40:23,063 INFO L226 Difference]: Without dead ends: 53 [2018-11-06 22:40:23,064 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:40:23,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-11-06 22:40:23,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2018-11-06 22:40:23,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-06 22:40:23,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-11-06 22:40:23,068 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 46 [2018-11-06 22:40:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:23,069 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-11-06 22:40:23,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-06 22:40:23,069 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-11-06 22:40:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-06 22:40:23,070 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:23,070 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:23,070 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:23,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:23,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1256286608, now seen corresponding path program 10 times [2018-11-06 22:40:23,071 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:23,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:23,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:23,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:23,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:23,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:23,277 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:40:23,285 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:40:23,323 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:40:23,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:23,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:23,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:23,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-06 22:40:23,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-06 22:40:23,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-06 22:40:23,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:40:23,381 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 14 states. [2018-11-06 22:40:23,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:23,454 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-11-06 22:40:23,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-06 22:40:23,456 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2018-11-06 22:40:23,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:23,457 INFO L225 Difference]: With dead ends: 62 [2018-11-06 22:40:23,457 INFO L226 Difference]: Without dead ends: 57 [2018-11-06 22:40:23,458 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:40:23,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-06 22:40:23,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2018-11-06 22:40:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-06 22:40:23,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-11-06 22:40:23,463 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 50 [2018-11-06 22:40:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:23,463 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-11-06 22:40:23,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-06 22:40:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-11-06 22:40:23,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-06 22:40:23,464 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:23,464 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:23,465 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:23,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:23,465 INFO L82 PathProgramCache]: Analyzing trace with hash -759626313, now seen corresponding path program 11 times [2018-11-06 22:40:23,465 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:23,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:23,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:23,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:23,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:23,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:23,685 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 22:40:23,696 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:40:23,750 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-11-06 22:40:23,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:23,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:23,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:23,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-06 22:40:23,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-06 22:40:23,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-06 22:40:23,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:40:23,806 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 15 states. [2018-11-06 22:40:23,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:23,900 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-11-06 22:40:23,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-06 22:40:23,900 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2018-11-06 22:40:23,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:23,901 INFO L225 Difference]: With dead ends: 66 [2018-11-06 22:40:23,901 INFO L226 Difference]: Without dead ends: 61 [2018-11-06 22:40:23,902 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:40:23,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-11-06 22:40:23,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-11-06 22:40:23,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-06 22:40:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-11-06 22:40:23,907 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 54 [2018-11-06 22:40:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:23,907 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-11-06 22:40:23,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-06 22:40:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-11-06 22:40:23,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-06 22:40:23,908 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:23,908 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:23,909 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:23,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:23,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1284736642, now seen corresponding path program 12 times [2018-11-06 22:40:23,909 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:23,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:23,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:23,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:23,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:24,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:24,183 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 22:40:24,192 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:40:24,307 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-11-06 22:40:24,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:24,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:24,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:24,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-11-06 22:40:24,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-06 22:40:24,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-06 22:40:24,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:40:24,367 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 16 states. [2018-11-06 22:40:24,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:24,490 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-11-06 22:40:24,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-06 22:40:24,490 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2018-11-06 22:40:24,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:24,492 INFO L225 Difference]: With dead ends: 70 [2018-11-06 22:40:24,492 INFO L226 Difference]: Without dead ends: 65 [2018-11-06 22:40:24,493 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:40:24,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-11-06 22:40:24,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2018-11-06 22:40:24,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-06 22:40:24,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-11-06 22:40:24,499 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 58 [2018-11-06 22:40:24,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:24,500 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-11-06 22:40:24,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-06 22:40:24,500 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-11-06 22:40:24,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-11-06 22:40:24,501 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:24,501 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:24,502 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:24,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:24,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1646440901, now seen corresponding path program 13 times [2018-11-06 22:40:24,502 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:24,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:24,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:24,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:24,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:24,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:24,766 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 22:40:24,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:24,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:24,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:24,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-11-06 22:40:24,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-06 22:40:24,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-06 22:40:24,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:40:24,848 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 17 states. [2018-11-06 22:40:24,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:24,963 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-11-06 22:40:24,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 22:40:24,963 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2018-11-06 22:40:24,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:24,964 INFO L225 Difference]: With dead ends: 74 [2018-11-06 22:40:24,964 INFO L226 Difference]: Without dead ends: 69 [2018-11-06 22:40:24,965 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:40:24,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-06 22:40:24,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2018-11-06 22:40:24,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-06 22:40:24,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-11-06 22:40:24,971 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 62 [2018-11-06 22:40:24,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:24,971 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-11-06 22:40:24,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-06 22:40:24,971 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-11-06 22:40:24,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-11-06 22:40:24,972 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:24,973 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:24,973 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:24,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:24,973 INFO L82 PathProgramCache]: Analyzing trace with hash -555389300, now seen corresponding path program 14 times [2018-11-06 22:40:24,973 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:24,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:24,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:24,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:24,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:25,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:25,241 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 22:40:25,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:40:25,284 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:40:25,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:25,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:25,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:25,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-11-06 22:40:25,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-06 22:40:25,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-06 22:40:25,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:40:25,348 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 18 states. [2018-11-06 22:40:25,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:25,436 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-11-06 22:40:25,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-06 22:40:25,442 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2018-11-06 22:40:25,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:25,443 INFO L225 Difference]: With dead ends: 78 [2018-11-06 22:40:25,443 INFO L226 Difference]: Without dead ends: 73 [2018-11-06 22:40:25,444 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:40:25,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-11-06 22:40:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2018-11-06 22:40:25,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-11-06 22:40:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-11-06 22:40:25,456 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 66 [2018-11-06 22:40:25,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:25,456 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-11-06 22:40:25,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-06 22:40:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-11-06 22:40:25,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-06 22:40:25,460 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:25,460 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:25,460 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:25,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:25,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1898025005, now seen corresponding path program 15 times [2018-11-06 22:40:25,461 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:25,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:25,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:25,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:25,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:26,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:26,529 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 22:40:26,540 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:40:26,756 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-06 22:40:26,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:26,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:26,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:26,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-11-06 22:40:26,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-06 22:40:26,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-06 22:40:26,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:40:26,823 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 19 states. [2018-11-06 22:40:26,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:26,956 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-11-06 22:40:26,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-06 22:40:26,957 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2018-11-06 22:40:26,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:26,958 INFO L225 Difference]: With dead ends: 82 [2018-11-06 22:40:26,958 INFO L226 Difference]: Without dead ends: 77 [2018-11-06 22:40:26,959 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:40:26,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-11-06 22:40:26,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2018-11-06 22:40:26,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-06 22:40:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-11-06 22:40:26,963 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 70 [2018-11-06 22:40:26,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:26,963 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-11-06 22:40:26,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-06 22:40:26,964 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-11-06 22:40:26,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-11-06 22:40:26,964 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:26,965 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:26,965 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:26,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:26,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1403554406, now seen corresponding path program 16 times [2018-11-06 22:40:26,965 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:26,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:26,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:26,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:26,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:27,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:27,217 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 22:40:27,226 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:40:27,350 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:40:27,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:27,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:27,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:27,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-11-06 22:40:27,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-06 22:40:27,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-06 22:40:27,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:40:27,403 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 20 states. [2018-11-06 22:40:27,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:27,516 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-11-06 22:40:27,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-06 22:40:27,517 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2018-11-06 22:40:27,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:27,518 INFO L225 Difference]: With dead ends: 86 [2018-11-06 22:40:27,518 INFO L226 Difference]: Without dead ends: 81 [2018-11-06 22:40:27,519 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:40:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-06 22:40:27,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2018-11-06 22:40:27,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-06 22:40:27,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-11-06 22:40:27,524 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 74 [2018-11-06 22:40:27,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:27,524 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-11-06 22:40:27,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-06 22:40:27,524 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-11-06 22:40:27,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-11-06 22:40:27,526 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:27,526 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:27,526 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:27,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:27,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1229307935, now seen corresponding path program 17 times [2018-11-06 22:40:27,527 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:27,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:27,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:27,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:27,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:27,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:27,893 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 22:40:27,904 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:40:28,051 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-11-06 22:40:28,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:28,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:28,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:28,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-11-06 22:40:28,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-06 22:40:28,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-06 22:40:28,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:40:28,112 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 21 states. [2018-11-06 22:40:28,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:28,215 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-11-06 22:40:28,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-06 22:40:28,216 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 78 [2018-11-06 22:40:28,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:28,217 INFO L225 Difference]: With dead ends: 90 [2018-11-06 22:40:28,217 INFO L226 Difference]: Without dead ends: 85 [2018-11-06 22:40:28,218 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:40:28,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-11-06 22:40:28,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2018-11-06 22:40:28,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-11-06 22:40:28,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-11-06 22:40:28,222 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 78 [2018-11-06 22:40:28,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:28,222 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-11-06 22:40:28,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-06 22:40:28,222 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-11-06 22:40:28,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-06 22:40:28,223 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:28,224 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:28,224 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:28,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:28,224 INFO L82 PathProgramCache]: Analyzing trace with hash -493842776, now seen corresponding path program 18 times [2018-11-06 22:40:28,224 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:28,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:28,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:28,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:28,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:29,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:29,332 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 22:40:29,342 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:40:29,827 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-11-06 22:40:29,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:29,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:29,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:29,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-11-06 22:40:29,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 22:40:29,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 22:40:29,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:40:29,896 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 22 states. [2018-11-06 22:40:30,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:30,172 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-11-06 22:40:30,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-06 22:40:30,173 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2018-11-06 22:40:30,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:30,174 INFO L225 Difference]: With dead ends: 94 [2018-11-06 22:40:30,174 INFO L226 Difference]: Without dead ends: 89 [2018-11-06 22:40:30,175 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:40:30,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-11-06 22:40:30,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2018-11-06 22:40:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-06 22:40:30,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-11-06 22:40:30,179 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 82 [2018-11-06 22:40:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:30,179 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-11-06 22:40:30,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 22:40:30,180 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-11-06 22:40:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-11-06 22:40:30,181 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:30,181 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:30,181 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:30,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:30,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1987829265, now seen corresponding path program 19 times [2018-11-06 22:40:30,181 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:30,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:30,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:30,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:30,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:30,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:30,491 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:40:30,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:30,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:30,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:30,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-11-06 22:40:30,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-06 22:40:30,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-06 22:40:30,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:40:30,606 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 23 states. [2018-11-06 22:40:30,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:30,855 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-11-06 22:40:30,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 22:40:30,856 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2018-11-06 22:40:30,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:30,857 INFO L225 Difference]: With dead ends: 98 [2018-11-06 22:40:30,857 INFO L226 Difference]: Without dead ends: 93 [2018-11-06 22:40:30,858 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:40:30,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-11-06 22:40:30,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2018-11-06 22:40:30,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-11-06 22:40:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-11-06 22:40:30,861 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 86 [2018-11-06 22:40:30,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:30,862 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-11-06 22:40:30,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-06 22:40:30,862 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-11-06 22:40:30,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-11-06 22:40:30,863 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:30,863 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:30,863 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:30,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:30,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1705068106, now seen corresponding path program 20 times [2018-11-06 22:40:30,864 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:30,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:30,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:30,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:30,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:31,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:31,220 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 22:40:31,231 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:40:31,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:40:31,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:31,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:31,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:31,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-11-06 22:40:31,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-06 22:40:31,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-06 22:40:31,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:40:31,309 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 24 states. [2018-11-06 22:40:31,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:31,532 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-11-06 22:40:31,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-06 22:40:31,534 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 90 [2018-11-06 22:40:31,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:31,535 INFO L225 Difference]: With dead ends: 102 [2018-11-06 22:40:31,535 INFO L226 Difference]: Without dead ends: 97 [2018-11-06 22:40:31,536 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:40:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-11-06 22:40:31,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2018-11-06 22:40:31,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-11-06 22:40:31,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-11-06 22:40:31,539 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 90 [2018-11-06 22:40:31,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:31,539 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-11-06 22:40:31,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-06 22:40:31,540 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-11-06 22:40:31,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-11-06 22:40:31,540 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:31,540 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:31,541 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:31,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:31,541 INFO L82 PathProgramCache]: Analyzing trace with hash 151655933, now seen corresponding path program 21 times [2018-11-06 22:40:31,541 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:31,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:31,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:31,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:31,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:32,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:32,114 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 22:40:32,127 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:40:33,173 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-06 22:40:33,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:33,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:33,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:33,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-11-06 22:40:33,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-06 22:40:33,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-06 22:40:33,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:40:33,237 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 25 states. [2018-11-06 22:40:33,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:33,377 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-11-06 22:40:33,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-06 22:40:33,380 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 94 [2018-11-06 22:40:33,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:33,381 INFO L225 Difference]: With dead ends: 106 [2018-11-06 22:40:33,381 INFO L226 Difference]: Without dead ends: 101 [2018-11-06 22:40:33,382 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:40:33,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-11-06 22:40:33,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2018-11-06 22:40:33,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-11-06 22:40:33,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-11-06 22:40:33,385 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 94 [2018-11-06 22:40:33,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:33,386 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-11-06 22:40:33,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-06 22:40:33,386 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-11-06 22:40:33,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-11-06 22:40:33,387 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:33,387 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:33,387 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:33,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:33,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1049622212, now seen corresponding path program 22 times [2018-11-06 22:40:33,388 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:33,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:33,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:33,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:33,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:33,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:33,872 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 22:40:33,880 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:40:34,318 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:40:34,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:34,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:34,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:34,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-11-06 22:40:34,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-06 22:40:34,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-06 22:40:34,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-06 22:40:34,384 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 26 states. [2018-11-06 22:40:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:34,529 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-11-06 22:40:34,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-06 22:40:34,529 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 98 [2018-11-06 22:40:34,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:34,530 INFO L225 Difference]: With dead ends: 110 [2018-11-06 22:40:34,530 INFO L226 Difference]: Without dead ends: 105 [2018-11-06 22:40:34,531 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-11-06 22:40:34,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-11-06 22:40:34,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2018-11-06 22:40:34,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-11-06 22:40:34,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-11-06 22:40:34,535 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 98 [2018-11-06 22:40:34,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:34,535 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-11-06 22:40:34,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-06 22:40:34,535 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-11-06 22:40:34,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-11-06 22:40:34,536 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:34,536 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:34,536 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:34,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:34,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1994777589, now seen corresponding path program 23 times [2018-11-06 22:40:34,537 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:34,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:34,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:34,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:34,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:35,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:35,038 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 22:40:35,046 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:40:35,315 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-11-06 22:40:35,315 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:35,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:35,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:35,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-11-06 22:40:35,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-06 22:40:35,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-06 22:40:35,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-11-06 22:40:35,375 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 27 states. [2018-11-06 22:40:35,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:35,567 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-11-06 22:40:35,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-06 22:40:35,568 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2018-11-06 22:40:35,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:35,569 INFO L225 Difference]: With dead ends: 114 [2018-11-06 22:40:35,569 INFO L226 Difference]: Without dead ends: 109 [2018-11-06 22:40:35,570 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-11-06 22:40:35,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-11-06 22:40:35,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2018-11-06 22:40:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-11-06 22:40:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-11-06 22:40:35,573 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 102 [2018-11-06 22:40:35,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:35,574 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-11-06 22:40:35,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-06 22:40:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-11-06 22:40:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-11-06 22:40:35,574 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:35,574 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:35,574 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:35,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:35,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1947056686, now seen corresponding path program 24 times [2018-11-06 22:40:35,575 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:35,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:35,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:35,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:35,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:36,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:36,366 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 22:40:36,374 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:40:37,163 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-11-06 22:40:37,163 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:37,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:37,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:37,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-11-06 22:40:37,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-06 22:40:37,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-06 22:40:37,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:40:37,257 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 28 states. [2018-11-06 22:40:37,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:37,405 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-11-06 22:40:37,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-06 22:40:37,405 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2018-11-06 22:40:37,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:37,406 INFO L225 Difference]: With dead ends: 118 [2018-11-06 22:40:37,406 INFO L226 Difference]: Without dead ends: 113 [2018-11-06 22:40:37,407 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:40:37,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-11-06 22:40:37,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2018-11-06 22:40:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-11-06 22:40:37,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-11-06 22:40:37,411 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 106 [2018-11-06 22:40:37,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:37,411 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-11-06 22:40:37,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-06 22:40:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-11-06 22:40:37,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-11-06 22:40:37,412 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:37,412 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:37,412 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:37,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:37,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1350421479, now seen corresponding path program 25 times [2018-11-06 22:40:37,413 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:37,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:37,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:37,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:37,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:37,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:37,973 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 22:40:37,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:38,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:38,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:38,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-11-06 22:40:38,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-06 22:40:38,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-06 22:40:38,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-11-06 22:40:38,057 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 29 states. [2018-11-06 22:40:38,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:38,196 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-11-06 22:40:38,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-06 22:40:38,198 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 110 [2018-11-06 22:40:38,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:38,199 INFO L225 Difference]: With dead ends: 122 [2018-11-06 22:40:38,199 INFO L226 Difference]: Without dead ends: 117 [2018-11-06 22:40:38,200 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-11-06 22:40:38,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-11-06 22:40:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2018-11-06 22:40:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-11-06 22:40:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-11-06 22:40:38,204 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 110 [2018-11-06 22:40:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:38,205 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-11-06 22:40:38,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-06 22:40:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-11-06 22:40:38,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-11-06 22:40:38,205 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:38,206 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:38,206 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:38,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:38,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1856788768, now seen corresponding path program 26 times [2018-11-06 22:40:38,206 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:38,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:38,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:38,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:38,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:38,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:38,896 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 22:40:38,904 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:40:38,932 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:40:38,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:38,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:38,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:38,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-11-06 22:40:38,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-06 22:40:38,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-06 22:40:38,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-11-06 22:40:38,998 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 30 states. [2018-11-06 22:40:39,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:39,242 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-11-06 22:40:39,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-06 22:40:39,242 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 114 [2018-11-06 22:40:39,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:39,243 INFO L225 Difference]: With dead ends: 126 [2018-11-06 22:40:39,244 INFO L226 Difference]: Without dead ends: 121 [2018-11-06 22:40:39,245 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-11-06 22:40:39,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-11-06 22:40:39,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2018-11-06 22:40:39,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-11-06 22:40:39,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-11-06 22:40:39,248 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 114 [2018-11-06 22:40:39,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:39,248 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-11-06 22:40:39,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-06 22:40:39,248 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-11-06 22:40:39,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-11-06 22:40:39,249 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:39,249 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:39,249 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:39,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:39,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1947229735, now seen corresponding path program 27 times [2018-11-06 22:40:39,249 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:39,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:39,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:39,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:39,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:40,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:40,960 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 22:40:40,969 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:40:43,585 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-11-06 22:40:43,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:43,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:43,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:43,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-11-06 22:40:43,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-06 22:40:43,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-06 22:40:43,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:40:43,669 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 31 states. [2018-11-06 22:40:43,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:43,837 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-11-06 22:40:43,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-06 22:40:43,837 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 118 [2018-11-06 22:40:43,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:43,839 INFO L225 Difference]: With dead ends: 130 [2018-11-06 22:40:43,839 INFO L226 Difference]: Without dead ends: 125 [2018-11-06 22:40:43,840 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:40:43,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-11-06 22:40:43,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2018-11-06 22:40:43,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-11-06 22:40:43,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-11-06 22:40:43,844 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 118 [2018-11-06 22:40:43,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:43,844 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-11-06 22:40:43,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-06 22:40:43,845 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-11-06 22:40:43,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-11-06 22:40:43,845 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:43,846 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:43,846 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:43,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:43,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1350428178, now seen corresponding path program 28 times [2018-11-06 22:40:43,846 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:43,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:43,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:43,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:43,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:44,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:44,462 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 22:40:44,470 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:40:45,615 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:40:45,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:45,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:45,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:45,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-11-06 22:40:45,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-06 22:40:45,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-06 22:40:45,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-06 22:40:45,672 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 32 states. [2018-11-06 22:40:45,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:45,865 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-11-06 22:40:45,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-06 22:40:45,865 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 122 [2018-11-06 22:40:45,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:45,866 INFO L225 Difference]: With dead ends: 134 [2018-11-06 22:40:45,867 INFO L226 Difference]: Without dead ends: 129 [2018-11-06 22:40:45,868 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-11-06 22:40:45,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-11-06 22:40:45,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2018-11-06 22:40:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-11-06 22:40:45,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-11-06 22:40:45,871 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 122 [2018-11-06 22:40:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:45,871 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-11-06 22:40:45,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-06 22:40:45,872 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-11-06 22:40:45,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-11-06 22:40:45,872 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:45,872 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:45,872 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:45,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:45,873 INFO L82 PathProgramCache]: Analyzing trace with hash 546478645, now seen corresponding path program 29 times [2018-11-06 22:40:45,873 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:45,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:45,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:45,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:45,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:46,464 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:46,464 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 22:40:46,472 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:40:47,124 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-11-06 22:40:47,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:47,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:47,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:47,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-11-06 22:40:47,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-06 22:40:47,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-06 22:40:47,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-11-06 22:40:47,190 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 33 states. [2018-11-06 22:40:47,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:47,632 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-11-06 22:40:47,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-06 22:40:47,632 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 126 [2018-11-06 22:40:47,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:47,634 INFO L225 Difference]: With dead ends: 138 [2018-11-06 22:40:47,634 INFO L226 Difference]: Without dead ends: 133 [2018-11-06 22:40:47,635 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-11-06 22:40:47,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-11-06 22:40:47,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2018-11-06 22:40:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-11-06 22:40:47,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-11-06 22:40:47,639 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 126 [2018-11-06 22:40:47,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:47,639 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-11-06 22:40:47,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-06 22:40:47,639 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-11-06 22:40:47,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-11-06 22:40:47,640 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:47,640 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:47,641 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:47,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:47,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1723097348, now seen corresponding path program 30 times [2018-11-06 22:40:47,641 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:47,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:47,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:47,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:47,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:48,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:48,122 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 22:40:48,131 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:40:57,436 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-11-06 22:40:57,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:57,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:57,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:57,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-11-06 22:40:57,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-06 22:40:57,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-06 22:40:57,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 22:40:57,520 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 34 states. [2018-11-06 22:40:57,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:57,687 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-11-06 22:40:57,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-06 22:40:57,688 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 130 [2018-11-06 22:40:57,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:57,689 INFO L225 Difference]: With dead ends: 142 [2018-11-06 22:40:57,689 INFO L226 Difference]: Without dead ends: 137 [2018-11-06 22:40:57,691 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 22:40:57,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-11-06 22:40:57,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2018-11-06 22:40:57,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-11-06 22:40:57,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-11-06 22:40:57,694 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 130 [2018-11-06 22:40:57,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:57,694 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-11-06 22:40:57,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-06 22:40:57,695 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-11-06 22:40:57,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-11-06 22:40:57,695 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:57,695 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:57,695 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:57,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:57,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1356261443, now seen corresponding path program 31 times [2018-11-06 22:40:57,696 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:57,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:57,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:57,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:57,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 0 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:58,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:58,259 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 22:40:58,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:58,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 0 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:58,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:58,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-11-06 22:40:58,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-06 22:40:58,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-06 22:40:58,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-11-06 22:40:58,357 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 35 states. [2018-11-06 22:40:58,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:58,512 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-11-06 22:40:58,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-06 22:40:58,512 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2018-11-06 22:40:58,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:58,513 INFO L225 Difference]: With dead ends: 146 [2018-11-06 22:40:58,513 INFO L226 Difference]: Without dead ends: 141 [2018-11-06 22:40:58,514 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-11-06 22:40:58,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-11-06 22:40:58,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2018-11-06 22:40:58,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-11-06 22:40:58,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-11-06 22:40:58,518 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 134 [2018-11-06 22:40:58,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:58,518 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-11-06 22:40:58,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-06 22:40:58,519 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-11-06 22:40:58,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-11-06 22:40:58,519 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:58,519 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:58,520 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:58,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:58,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1400780298, now seen corresponding path program 32 times [2018-11-06 22:40:58,520 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:58,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:58,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:58,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:40:58,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:40:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 0 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:59,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:40:59,144 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 22:40:59,152 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:40:59,182 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:40:59,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:40:59,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:40:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 0 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:40:59,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:40:59,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-11-06 22:40:59,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-06 22:40:59,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-06 22:40:59,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-11-06 22:40:59,287 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 36 states. [2018-11-06 22:40:59,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:40:59,515 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-11-06 22:40:59,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-06 22:40:59,515 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 138 [2018-11-06 22:40:59,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:40:59,517 INFO L225 Difference]: With dead ends: 150 [2018-11-06 22:40:59,517 INFO L226 Difference]: Without dead ends: 145 [2018-11-06 22:40:59,518 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-11-06 22:40:59,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-11-06 22:40:59,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2018-11-06 22:40:59,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-11-06 22:40:59,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-11-06 22:40:59,521 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 138 [2018-11-06 22:40:59,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:40:59,522 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-11-06 22:40:59,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-06 22:40:59,522 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-11-06 22:40:59,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-11-06 22:40:59,523 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:40:59,523 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:40:59,523 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:40:59,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:40:59,523 INFO L82 PathProgramCache]: Analyzing trace with hash -223655855, now seen corresponding path program 33 times [2018-11-06 22:40:59,524 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:40:59,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:40:59,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:59,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:40:59,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:40:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 0 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:00,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:00,161 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 22:41:00,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:41:07,257 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-11-06 22:41:07,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:07,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 0 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:07,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:07,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-11-06 22:41:07,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-06 22:41:07,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-06 22:41:07,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-11-06 22:41:07,340 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 37 states. [2018-11-06 22:41:07,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:07,573 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-11-06 22:41:07,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-06 22:41:07,573 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 142 [2018-11-06 22:41:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:07,574 INFO L225 Difference]: With dead ends: 154 [2018-11-06 22:41:07,575 INFO L226 Difference]: Without dead ends: 149 [2018-11-06 22:41:07,576 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-11-06 22:41:07,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-11-06 22:41:07,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2018-11-06 22:41:07,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-11-06 22:41:07,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-11-06 22:41:07,579 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 142 [2018-11-06 22:41:07,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:07,580 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-11-06 22:41:07,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-06 22:41:07,580 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-11-06 22:41:07,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-11-06 22:41:07,581 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:07,581 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:07,581 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:07,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:07,581 INFO L82 PathProgramCache]: Analyzing trace with hash 887611160, now seen corresponding path program 34 times [2018-11-06 22:41:07,582 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:07,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:07,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:07,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:07,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:08,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:08,412 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 22:41:08,420 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:41:10,691 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:41:10,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:10,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:10,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:10,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-11-06 22:41:10,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-06 22:41:10,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-06 22:41:10,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-11-06 22:41:10,771 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 38 states. [2018-11-06 22:41:11,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:11,047 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-11-06 22:41:11,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-06 22:41:11,048 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 146 [2018-11-06 22:41:11,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:11,049 INFO L225 Difference]: With dead ends: 158 [2018-11-06 22:41:11,049 INFO L226 Difference]: Without dead ends: 153 [2018-11-06 22:41:11,050 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-11-06 22:41:11,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-11-06 22:41:11,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2018-11-06 22:41:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-11-06 22:41:11,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-11-06 22:41:11,054 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 146 [2018-11-06 22:41:11,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:11,054 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-11-06 22:41:11,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-06 22:41:11,054 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-11-06 22:41:11,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-11-06 22:41:11,055 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:11,055 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:11,056 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:11,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:11,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1172159071, now seen corresponding path program 35 times [2018-11-06 22:41:11,056 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:11,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:11,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:11,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:11,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:12,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:12,769 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 22:41:12,777 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:41:23,388 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-11-06 22:41:23,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:23,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:23,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:23,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-11-06 22:41:23,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-06 22:41:23,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-06 22:41:23,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-11-06 22:41:23,483 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 39 states. [2018-11-06 22:41:23,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:23,900 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-11-06 22:41:23,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-06 22:41:23,901 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 150 [2018-11-06 22:41:23,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:23,902 INFO L225 Difference]: With dead ends: 162 [2018-11-06 22:41:23,902 INFO L226 Difference]: Without dead ends: 157 [2018-11-06 22:41:23,903 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-11-06 22:41:23,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-11-06 22:41:23,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2018-11-06 22:41:23,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-11-06 22:41:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-11-06 22:41:23,907 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 150 [2018-11-06 22:41:23,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:23,908 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-11-06 22:41:23,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-06 22:41:23,908 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-11-06 22:41:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-11-06 22:41:23,909 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:23,909 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:23,909 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:23,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:23,910 INFO L82 PathProgramCache]: Analyzing trace with hash -430532058, now seen corresponding path program 36 times [2018-11-06 22:41:23,910 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:23,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:23,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:23,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:23,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:24,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:24,825 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 22:41:24,834 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:41:36,556 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-11-06 22:41:36,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:36,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:36,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:36,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-11-06 22:41:36,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-06 22:41:36,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-06 22:41:36,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:41:36,731 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 40 states. [2018-11-06 22:41:38,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:38,088 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-11-06 22:41:38,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-06 22:41:38,089 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 154 [2018-11-06 22:41:38,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:38,090 INFO L225 Difference]: With dead ends: 166 [2018-11-06 22:41:38,091 INFO L226 Difference]: Without dead ends: 161 [2018-11-06 22:41:38,092 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:41:38,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-11-06 22:41:38,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2018-11-06 22:41:38,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-11-06 22:41:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-11-06 22:41:38,097 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 154 [2018-11-06 22:41:38,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:38,098 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-11-06 22:41:38,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-06 22:41:38,098 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-11-06 22:41:38,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-11-06 22:41:38,099 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:38,099 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:38,099 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:38,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:38,099 INFO L82 PathProgramCache]: Analyzing trace with hash -600031635, now seen corresponding path program 37 times [2018-11-06 22:41:38,099 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:38,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:38,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:38,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:38,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 0 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:38,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:38,917 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 22:41:38,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:41:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:38,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 0 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:39,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:39,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-11-06 22:41:39,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-11-06 22:41:39,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-11-06 22:41:39,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-11-06 22:41:39,023 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 41 states. [2018-11-06 22:41:39,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:39,214 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-11-06 22:41:39,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-06 22:41:39,214 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 158 [2018-11-06 22:41:39,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:39,216 INFO L225 Difference]: With dead ends: 170 [2018-11-06 22:41:39,216 INFO L226 Difference]: Without dead ends: 165 [2018-11-06 22:41:39,217 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-11-06 22:41:39,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-11-06 22:41:39,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2018-11-06 22:41:39,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-11-06 22:41:39,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-11-06 22:41:39,221 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 158 [2018-11-06 22:41:39,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:39,221 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-11-06 22:41:39,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-11-06 22:41:39,221 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-11-06 22:41:39,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-11-06 22:41:39,222 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:39,222 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:39,222 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:39,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:39,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1654155060, now seen corresponding path program 38 times [2018-11-06 22:41:39,222 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:39,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:39,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:39,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:41:39,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:40,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:40,140 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 22:41:40,148 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:41:40,205 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:41:40,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:40,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:40,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:40,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-11-06 22:41:40,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-06 22:41:40,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-06 22:41:40,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-06 22:41:40,298 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 42 states. [2018-11-06 22:41:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:40,684 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2018-11-06 22:41:40,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-06 22:41:40,684 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 162 [2018-11-06 22:41:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:40,685 INFO L225 Difference]: With dead ends: 174 [2018-11-06 22:41:40,685 INFO L226 Difference]: Without dead ends: 169 [2018-11-06 22:41:40,686 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-11-06 22:41:40,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-11-06 22:41:40,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2018-11-06 22:41:40,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-11-06 22:41:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-11-06 22:41:40,690 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 162 [2018-11-06 22:41:40,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:40,690 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-11-06 22:41:40,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-06 22:41:40,690 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-11-06 22:41:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-11-06 22:41:40,691 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:40,691 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:40,692 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:40,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:40,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1718299525, now seen corresponding path program 39 times [2018-11-06 22:41:40,692 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:40,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:40,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:40,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:40,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 0 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:41,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:41,433 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 22:41:41,453 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:41:55,283 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-11-06 22:41:55,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:41:55,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:41:55,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 0 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:55,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:41:55,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-11-06 22:41:55,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-06 22:41:55,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-06 22:41:55,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-11-06 22:41:55,451 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 43 states. [2018-11-06 22:41:56,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:41:56,988 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-11-06 22:41:56,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-06 22:41:56,988 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 166 [2018-11-06 22:41:56,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:41:56,990 INFO L225 Difference]: With dead ends: 178 [2018-11-06 22:41:56,990 INFO L226 Difference]: Without dead ends: 173 [2018-11-06 22:41:56,991 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-11-06 22:41:56,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-11-06 22:41:56,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2018-11-06 22:41:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-11-06 22:41:56,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-11-06 22:41:56,995 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 166 [2018-11-06 22:41:56,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:41:56,995 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-11-06 22:41:56,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-06 22:41:56,995 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-11-06 22:41:56,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-11-06 22:41:56,996 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:41:56,997 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:41:56,997 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:41:56,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:41:56,997 INFO L82 PathProgramCache]: Analyzing trace with hash -159693246, now seen corresponding path program 40 times [2018-11-06 22:41:56,997 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:41:56,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:41:56,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:56,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:41:56,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:41:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:41:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 0 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:41:57,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:41:57,744 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 22:41:57,753 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:42:00,516 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:42:00,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:42:00,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:42:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 0 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:42:00,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:42:00,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-11-06 22:42:00,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-06 22:42:00,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-06 22:42:00,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-11-06 22:42:00,589 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 44 states. [2018-11-06 22:42:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:42:00,822 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-11-06 22:42:00,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-06 22:42:00,823 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 170 [2018-11-06 22:42:00,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:42:00,824 INFO L225 Difference]: With dead ends: 182 [2018-11-06 22:42:00,824 INFO L226 Difference]: Without dead ends: 177 [2018-11-06 22:42:00,825 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-11-06 22:42:00,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-11-06 22:42:00,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2018-11-06 22:42:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-11-06 22:42:00,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-11-06 22:42:00,828 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 170 [2018-11-06 22:42:00,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:42:00,829 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-11-06 22:42:00,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-06 22:42:00,829 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-11-06 22:42:00,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-11-06 22:42:00,829 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:42:00,829 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:42:00,830 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:42:00,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:42:00,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1279951735, now seen corresponding path program 41 times [2018-11-06 22:42:00,830 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:42:00,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:42:00,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:00,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:42:00,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:42:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 0 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:42:02,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:42:02,243 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 22:42:02,252 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:42:19,795 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-11-06 22:42:19,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:42:19,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:42:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 0 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:42:19,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:42:19,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-11-06 22:42:19,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-06 22:42:19,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-06 22:42:19,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-11-06 22:42:19,882 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 45 states. [2018-11-06 22:42:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:42:20,132 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2018-11-06 22:42:20,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-06 22:42:20,132 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 174 [2018-11-06 22:42:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:42:20,134 INFO L225 Difference]: With dead ends: 186 [2018-11-06 22:42:20,134 INFO L226 Difference]: Without dead ends: 181 [2018-11-06 22:42:20,135 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-11-06 22:42:20,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-11-06 22:42:20,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2018-11-06 22:42:20,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-11-06 22:42:20,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-11-06 22:42:20,140 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 174 [2018-11-06 22:42:20,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:42:20,140 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-11-06 22:42:20,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-06 22:42:20,141 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-11-06 22:42:20,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-11-06 22:42:20,141 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:42:20,142 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:42:20,142 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:42:20,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:42:20,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1087190864, now seen corresponding path program 42 times [2018-11-06 22:42:20,142 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:42:20,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:42:20,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:20,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:42:20,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:42:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:42:20,976 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 22:42:20,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:42:20,976 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 22:42:20,985 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:43:11,769 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-11-06 22:43:11,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:11,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:11,834 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 22:43:11,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:11,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-11-06 22:43:11,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-11-06 22:43:11,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-11-06 22:43:11,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-11-06 22:43:11,872 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 46 states. [2018-11-06 22:43:12,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:12,110 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2018-11-06 22:43:12,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-06 22:43:12,110 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 178 [2018-11-06 22:43:12,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:12,112 INFO L225 Difference]: With dead ends: 190 [2018-11-06 22:43:12,112 INFO L226 Difference]: Without dead ends: 185 [2018-11-06 22:43:12,113 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-11-06 22:43:12,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-11-06 22:43:12,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2018-11-06 22:43:12,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-11-06 22:43:12,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-11-06 22:43:12,117 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 178 [2018-11-06 22:43:12,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:12,118 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-11-06 22:43:12,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-11-06 22:43:12,118 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-11-06 22:43:12,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-11-06 22:43:12,119 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:12,119 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:12,119 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:12,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:12,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1301530985, now seen corresponding path program 43 times [2018-11-06 22:43:12,119 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:12,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:12,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:12,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:12,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 0 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:12,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:12,970 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 22:43:12,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:13,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 0 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:13,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:13,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-11-06 22:43:13,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-11-06 22:43:13,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-11-06 22:43:13,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-11-06 22:43:13,089 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 47 states. [2018-11-06 22:43:13,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:13,366 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2018-11-06 22:43:13,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-06 22:43:13,367 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 182 [2018-11-06 22:43:13,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:13,369 INFO L225 Difference]: With dead ends: 194 [2018-11-06 22:43:13,369 INFO L226 Difference]: Without dead ends: 189 [2018-11-06 22:43:13,370 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-11-06 22:43:13,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-11-06 22:43:13,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2018-11-06 22:43:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-11-06 22:43:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-11-06 22:43:13,373 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 182 [2018-11-06 22:43:13,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:13,374 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-11-06 22:43:13,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-11-06 22:43:13,374 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-11-06 22:43:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-11-06 22:43:13,375 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:13,375 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:13,375 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:13,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:13,375 INFO L82 PathProgramCache]: Analyzing trace with hash 844905054, now seen corresponding path program 44 times [2018-11-06 22:43:13,375 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:13,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:13,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:13,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:43:13,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 0 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:14,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:14,362 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 22:43:14,372 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:43:14,414 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:43:14,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:14,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 0 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:14,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:14,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-11-06 22:43:14,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-11-06 22:43:14,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-11-06 22:43:14,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-11-06 22:43:14,502 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 48 states. [2018-11-06 22:43:14,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:14,812 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2018-11-06 22:43:14,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-06 22:43:14,813 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 186 [2018-11-06 22:43:14,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:14,814 INFO L225 Difference]: With dead ends: 198 [2018-11-06 22:43:14,814 INFO L226 Difference]: Without dead ends: 193 [2018-11-06 22:43:14,815 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-11-06 22:43:14,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-11-06 22:43:14,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2018-11-06 22:43:14,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-11-06 22:43:14,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-11-06 22:43:14,818 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 186 [2018-11-06 22:43:14,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:14,819 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-11-06 22:43:14,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-11-06 22:43:14,819 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-11-06 22:43:14,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-11-06 22:43:14,820 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:14,820 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:14,820 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:14,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:14,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1871119013, now seen corresponding path program 45 times [2018-11-06 22:43:14,821 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:14,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:14,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:14,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:14,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 0 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:16,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:16,211 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 22:43:16,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:43:48,726 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-11-06 22:43:48,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:48,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 0 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:48,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:48,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2018-11-06 22:43:48,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-11-06 22:43:48,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-11-06 22:43:48,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-11-06 22:43:48,881 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 49 states. [2018-11-06 22:43:49,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:49,150 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2018-11-06 22:43:49,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-11-06 22:43:49,151 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 190 [2018-11-06 22:43:49,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:49,152 INFO L225 Difference]: With dead ends: 202 [2018-11-06 22:43:49,152 INFO L226 Difference]: Without dead ends: 197 [2018-11-06 22:43:49,152 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-11-06 22:43:49,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-11-06 22:43:49,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 195. [2018-11-06 22:43:49,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-11-06 22:43:49,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-11-06 22:43:49,157 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 190 [2018-11-06 22:43:49,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:49,157 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-11-06 22:43:49,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-11-06 22:43:49,157 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-11-06 22:43:49,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-11-06 22:43:49,158 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:49,158 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:49,158 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:49,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:49,159 INFO L82 PathProgramCache]: Analyzing trace with hash 234245996, now seen corresponding path program 46 times [2018-11-06 22:43:49,159 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:49,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:49,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:49,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:49,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:50,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:50,747 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 22:43:50,758 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:43:57,629 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:43:57,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:43:57,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:43:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:57,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:43:57,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-11-06 22:43:57,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-11-06 22:43:57,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-11-06 22:43:57,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-11-06 22:43:57,811 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 50 states. [2018-11-06 22:43:58,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:43:58,035 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2018-11-06 22:43:58,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-11-06 22:43:58,036 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 194 [2018-11-06 22:43:58,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:43:58,037 INFO L225 Difference]: With dead ends: 206 [2018-11-06 22:43:58,037 INFO L226 Difference]: Without dead ends: 201 [2018-11-06 22:43:58,038 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-11-06 22:43:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-11-06 22:43:58,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2018-11-06 22:43:58,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-11-06 22:43:58,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-11-06 22:43:58,041 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 194 [2018-11-06 22:43:58,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:43:58,042 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-11-06 22:43:58,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-11-06 22:43:58,042 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-11-06 22:43:58,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-11-06 22:43:58,043 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:43:58,043 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:43:58,043 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:43:58,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:43:58,044 INFO L82 PathProgramCache]: Analyzing trace with hash 382984371, now seen corresponding path program 47 times [2018-11-06 22:43:58,044 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:43:58,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:43:58,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:58,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:43:58,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:43:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:43:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 0 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:43:58,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:43:58,986 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 22:43:58,995 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:44:02,486 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-11-06 22:44:02,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:44:02,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:44:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 0 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:02,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:44:02,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2018-11-06 22:44:02,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-11-06 22:44:02,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-11-06 22:44:02,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-11-06 22:44:02,566 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 51 states. [2018-11-06 22:44:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:44:02,839 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2018-11-06 22:44:02,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-06 22:44:02,839 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 198 [2018-11-06 22:44:02,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:44:02,840 INFO L225 Difference]: With dead ends: 210 [2018-11-06 22:44:02,840 INFO L226 Difference]: Without dead ends: 205 [2018-11-06 22:44:02,841 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-11-06 22:44:02,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-11-06 22:44:02,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2018-11-06 22:44:02,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-11-06 22:44:02,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-11-06 22:44:02,845 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 198 [2018-11-06 22:44:02,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:44:02,845 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-11-06 22:44:02,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-11-06 22:44:02,845 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-11-06 22:44:02,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-11-06 22:44:02,846 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:44:02,846 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:44:02,846 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:44:02,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:44:02,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1751742074, now seen corresponding path program 48 times [2018-11-06 22:44:02,846 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:44:02,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:44:02,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:02,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:44:02,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:44:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:44:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 0 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:44:03,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:44:03,929 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 22:44:03,937 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown