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-invgen/half_2_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 22:49:03,692 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 22:49:03,694 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 22:49:03,706 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 22:49:03,707 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 22:49:03,708 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 22:49:03,709 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 22:49:03,711 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 22:49:03,712 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 22:49:03,713 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 22:49:03,714 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 22:49:03,715 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 22:49:03,715 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 22:49:03,716 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 22:49:03,718 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 22:49:03,718 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 22:49:03,719 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 22:49:03,721 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 22:49:03,723 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 22:49:03,728 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 22:49:03,729 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 22:49:03,730 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 22:49:03,736 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-06 22:49:03,749 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 22:49:03,776 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 22:49:03,776 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 22:49:03,778 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 22:49:03,778 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 22:49:03,779 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 22:49:03,779 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 22:49:03,779 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 22:49:03,779 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 22:49:03,780 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 22:49:03,780 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 22:49:03,780 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 22:49:03,780 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 22:49:03,780 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 22:49:03,781 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 22:49:03,781 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 22:49:03,781 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 22:49:03,781 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 22:49:03,781 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 22:49:03,781 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 22:49:03,783 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:49:03,783 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 22:49:03,783 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 22:49:03,783 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 22:49:03,783 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 22:49:03,784 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 22:49:03,784 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 22:49:03,784 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 22:49:03,784 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 22:49:03,836 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 22:49:03,853 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 22:49:03,857 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 22:49:03,859 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 22:49:03,859 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 22:49:03,860 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/half_2_true-unreach-call_true-termination.i [2018-11-06 22:49:03,925 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ef203a07/597305c640c4430babe170baadcf0adb/FLAG668c126ba [2018-11-06 22:49:04,388 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 22:49:04,388 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/half_2_true-unreach-call_true-termination.i [2018-11-06 22:49:04,397 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ef203a07/597305c640c4430babe170baadcf0adb/FLAG668c126ba [2018-11-06 22:49:04,420 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ef203a07/597305c640c4430babe170baadcf0adb [2018-11-06 22:49:04,432 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 22:49:04,434 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 22:49:04,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 22:49:04,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 22:49:04,440 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 22:49:04,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:04" (1/1) ... [2018-11-06 22:49:04,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2166149d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04, skipping insertion in model container [2018-11-06 22:49:04,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:04" (1/1) ... [2018-11-06 22:49:04,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 22:49:04,484 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 22:49:04,655 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:49:04,659 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 22:49:04,680 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:49:04,698 INFO L193 MainTranslator]: Completed translation [2018-11-06 22:49:04,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04 WrapperNode [2018-11-06 22:49:04,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 22:49:04,699 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 22:49:04,699 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 22:49:04,700 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 22:49:04,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2018-11-06 22:49:04,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2018-11-06 22:49:04,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 22:49:04,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 22:49:04,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 22:49:04,735 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 22:49:04,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2018-11-06 22:49:04,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2018-11-06 22:49:04,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2018-11-06 22:49:04,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2018-11-06 22:49:04,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2018-11-06 22:49:04,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2018-11-06 22:49:04,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2018-11-06 22:49:04,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 22:49:04,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 22:49:04,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 22:49:04,755 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 22:49:04,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (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 22:49:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 22:49:04,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 22:49:05,225 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 22:49:05,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:05 BoogieIcfgContainer [2018-11-06 22:49:05,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 22:49:05,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 22:49:05,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 22:49:05,231 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 22:49:05,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:49:04" (1/3) ... [2018-11-06 22:49:05,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326c0821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:05, skipping insertion in model container [2018-11-06 22:49:05,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (2/3) ... [2018-11-06 22:49:05,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326c0821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:05, skipping insertion in model container [2018-11-06 22:49:05,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:05" (3/3) ... [2018-11-06 22:49:05,234 INFO L112 eAbstractionObserver]: Analyzing ICFG half_2_true-unreach-call_true-termination.i [2018-11-06 22:49:05,248 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 22:49:05,257 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 22:49:05,277 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 22:49:05,311 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 22:49:05,312 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 22:49:05,312 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 22:49:05,312 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 22:49:05,312 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 22:49:05,312 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 22:49:05,313 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 22:49:05,313 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 22:49:05,313 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 22:49:05,330 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2018-11-06 22:49:05,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-06 22:49:05,337 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:05,338 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:05,340 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:05,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:05,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1475821806, now seen corresponding path program 1 times [2018-11-06 22:49:05,350 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:05,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:05,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:05,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:49:05,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:05,464 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 22:49:05,466 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:49:05,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 22:49:05,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-06 22:49:05,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-06 22:49:05,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:49:05,488 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2018-11-06 22:49:05,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:05,505 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2018-11-06 22:49:05,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-06 22:49:05,507 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-11-06 22:49:05,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:05,519 INFO L225 Difference]: With dead ends: 27 [2018-11-06 22:49:05,519 INFO L226 Difference]: Without dead ends: 12 [2018-11-06 22:49:05,523 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 22:49:05,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-06 22:49:05,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-06 22:49:05,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-06 22:49:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-11-06 22:49:05,561 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2018-11-06 22:49:05,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:05,561 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-11-06 22:49:05,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-06 22:49:05,562 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-11-06 22:49:05,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-06 22:49:05,562 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:05,562 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:05,563 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:05,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:05,563 INFO L82 PathProgramCache]: Analyzing trace with hash -179909771, now seen corresponding path program 1 times [2018-11-06 22:49:05,564 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:05,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:05,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:05,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:49:05,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:05,711 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 22:49:05,711 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:49:05,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-06 22:49:05,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 22:49:05,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 22:49:05,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:49:05,714 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2018-11-06 22:49:05,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:05,847 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-11-06 22:49:05,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 22:49:05,847 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-11-06 22:49:05,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:05,848 INFO L225 Difference]: With dead ends: 23 [2018-11-06 22:49:05,848 INFO L226 Difference]: Without dead ends: 14 [2018-11-06 22:49:05,849 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:49:05,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-06 22:49:05,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-06 22:49:05,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-06 22:49:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-11-06 22:49:05,853 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-11-06 22:49:05,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:05,854 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-11-06 22:49:05,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 22:49:05,854 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-11-06 22:49:05,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-06 22:49:05,855 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:05,855 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:05,856 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:05,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:05,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1810121807, now seen corresponding path program 1 times [2018-11-06 22:49:05,856 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:05,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:05,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:05,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:49:05,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:06,087 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 22:49:06,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:06,088 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 22:49:06,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:49:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:06,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:06,388 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 22:49:06,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:06,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-11-06 22:49:06,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 22:49:06,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 22:49:06,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:49:06,413 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-11-06 22:49:06,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:06,590 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-11-06 22:49:06,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 22:49:06,591 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-11-06 22:49:06,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:06,591 INFO L225 Difference]: With dead ends: 27 [2018-11-06 22:49:06,591 INFO L226 Difference]: Without dead ends: 16 [2018-11-06 22:49:06,592 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:49:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-06 22:49:06,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-11-06 22:49:06,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-06 22:49:06,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-11-06 22:49:06,596 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2018-11-06 22:49:06,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:06,597 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-11-06 22:49:06,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 22:49:06,597 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-11-06 22:49:06,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-06 22:49:06,598 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:06,598 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:06,598 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:06,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:06,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1324945751, now seen corresponding path program 2 times [2018-11-06 22:49:06,599 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:06,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:06,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:06,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:49:06,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:06,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:06,754 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 22:49:06,778 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:49:06,815 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:49:06,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:06,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:06,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:06,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-06 22:49:06,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-06 22:49:06,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-06 22:49:06,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:49:06,989 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2018-11-06 22:49:07,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:07,145 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-06 22:49:07,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-06 22:49:07,146 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-11-06 22:49:07,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:07,147 INFO L225 Difference]: With dead ends: 28 [2018-11-06 22:49:07,147 INFO L226 Difference]: Without dead ends: 26 [2018-11-06 22:49:07,148 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:49:07,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-06 22:49:07,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2018-11-06 22:49:07,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-06 22:49:07,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-11-06 22:49:07,153 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-11-06 22:49:07,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:07,153 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-11-06 22:49:07,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-06 22:49:07,154 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-11-06 22:49:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-06 22:49:07,154 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:07,155 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:07,155 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:07,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:07,155 INFO L82 PathProgramCache]: Analyzing trace with hash -367652814, now seen corresponding path program 1 times [2018-11-06 22:49:07,155 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:07,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:07,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:07,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:07,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:07,674 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2018-11-06 22:49:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:07,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:07,831 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 22:49:07,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:49:07,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:07,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:08,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:08,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2018-11-06 22:49:08,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-06 22:49:08,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-06 22:49:08,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:49:08,120 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 16 states. [2018-11-06 22:49:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:08,580 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2018-11-06 22:49:08,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:49:08,581 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-11-06 22:49:08,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:08,581 INFO L225 Difference]: With dead ends: 36 [2018-11-06 22:49:08,582 INFO L226 Difference]: Without dead ends: 21 [2018-11-06 22:49:08,582 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:49:08,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-06 22:49:08,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-06 22:49:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-06 22:49:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-11-06 22:49:08,586 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-11-06 22:49:08,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:08,587 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-11-06 22:49:08,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-06 22:49:08,587 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-11-06 22:49:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-11-06 22:49:08,588 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:08,588 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:08,588 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:08,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:08,589 INFO L82 PathProgramCache]: Analyzing trace with hash -905834740, now seen corresponding path program 2 times [2018-11-06 22:49:08,589 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:08,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:08,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:08,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:49:08,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:08,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:08,723 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 22:49:08,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:49:08,743 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:49:08,744 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:08,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:09,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:09,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-11-06 22:49:09,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-06 22:49:09,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-06 22:49:09,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:49:09,018 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 13 states. [2018-11-06 22:49:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:09,194 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-11-06 22:49:09,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-06 22:49:09,196 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2018-11-06 22:49:09,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:09,197 INFO L225 Difference]: With dead ends: 34 [2018-11-06 22:49:09,197 INFO L226 Difference]: Without dead ends: 32 [2018-11-06 22:49:09,198 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:49:09,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-06 22:49:09,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2018-11-06 22:49:09,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-06 22:49:09,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-11-06 22:49:09,203 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2018-11-06 22:49:09,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:09,204 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-11-06 22:49:09,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-06 22:49:09,204 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-11-06 22:49:09,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-06 22:49:09,205 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:09,205 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:09,206 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:09,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:09,206 INFO L82 PathProgramCache]: Analyzing trace with hash -705411307, now seen corresponding path program 3 times [2018-11-06 22:49:09,206 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:09,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:09,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:09,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:09,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:09,694 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:09,694 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 22:49:09,703 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:49:09,717 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-06 22:49:09,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:09,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:10,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:10,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-11-06 22:49:10,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 22:49:10,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 22:49:10,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:49:10,022 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 22 states. [2018-11-06 22:49:10,384 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 7 [2018-11-06 22:49:10,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:10,998 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2018-11-06 22:49:10,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-06 22:49:10,999 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2018-11-06 22:49:11,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:11,001 INFO L225 Difference]: With dead ends: 46 [2018-11-06 22:49:11,001 INFO L226 Difference]: Without dead ends: 27 [2018-11-06 22:49:11,003 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 22:49:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-06 22:49:11,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-06 22:49:11,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-06 22:49:11,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-06 22:49:11,008 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-11-06 22:49:11,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:11,009 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-06 22:49:11,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 22:49:11,009 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-06 22:49:11,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-06 22:49:11,010 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:11,010 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:11,011 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:11,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:11,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1417165423, now seen corresponding path program 4 times [2018-11-06 22:49:11,011 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:11,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:11,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:11,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:11,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:11,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:11,179 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 22:49:11,187 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:49:11,229 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:49:11,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:11,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:11,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:11,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2018-11-06 22:49:11,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-06 22:49:11,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-06 22:49:11,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:49:11,414 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 17 states. [2018-11-06 22:49:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:11,725 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2018-11-06 22:49:11,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-06 22:49:11,725 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2018-11-06 22:49:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:11,727 INFO L225 Difference]: With dead ends: 40 [2018-11-06 22:49:11,727 INFO L226 Difference]: Without dead ends: 38 [2018-11-06 22:49:11,728 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:49:11,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-06 22:49:11,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2018-11-06 22:49:11,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-11-06 22:49:11,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-11-06 22:49:11,735 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2018-11-06 22:49:11,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:11,735 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-11-06 22:49:11,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-06 22:49:11,736 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-11-06 22:49:11,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-06 22:49:11,736 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:11,737 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:11,737 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:11,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1731196680, now seen corresponding path program 5 times [2018-11-06 22:49:11,738 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:11,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:11,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:11,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:11,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:12,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:12,266 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 22:49:12,279 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:49:12,297 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-11-06 22:49:12,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:12,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:12,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:12,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2018-11-06 22:49:12,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-06 22:49:12,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-06 22:49:12,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:49:12,707 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 24 states. [2018-11-06 22:49:13,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:13,490 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2018-11-06 22:49:13,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-06 22:49:13,491 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 30 [2018-11-06 22:49:13,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:13,491 INFO L225 Difference]: With dead ends: 56 [2018-11-06 22:49:13,492 INFO L226 Difference]: Without dead ends: 33 [2018-11-06 22:49:13,493 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:49:13,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-11-06 22:49:13,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-11-06 22:49:13,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-06 22:49:13,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-11-06 22:49:13,502 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-11-06 22:49:13,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:13,502 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-11-06 22:49:13,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-06 22:49:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-11-06 22:49:13,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-06 22:49:13,504 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:13,504 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:13,504 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:13,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:13,504 INFO L82 PathProgramCache]: Analyzing trace with hash 205689042, now seen corresponding path program 6 times [2018-11-06 22:49:13,504 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:13,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:13,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:13,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:13,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:13,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:13,779 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 22:49:13,790 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:49:13,846 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-11-06 22:49:13,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:13,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:14,147 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:14,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2018-11-06 22:49:14,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-06 22:49:14,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-06 22:49:14,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:49:14,148 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 19 states. [2018-11-06 22:49:14,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:14,404 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2018-11-06 22:49:14,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 22:49:14,404 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2018-11-06 22:49:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:14,406 INFO L225 Difference]: With dead ends: 46 [2018-11-06 22:49:14,406 INFO L226 Difference]: Without dead ends: 44 [2018-11-06 22:49:14,407 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2018-11-06 22:49:14,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-11-06 22:49:14,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2018-11-06 22:49:14,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-11-06 22:49:14,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-11-06 22:49:14,414 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2018-11-06 22:49:14,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:14,415 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-11-06 22:49:14,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-06 22:49:14,415 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-11-06 22:49:14,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-06 22:49:14,419 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:14,420 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:14,420 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:14,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:14,420 INFO L82 PathProgramCache]: Analyzing trace with hash 485651931, now seen corresponding path program 7 times [2018-11-06 22:49:14,420 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:14,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:14,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:14,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:14,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:14,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:14,912 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 22:49:14,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:49:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:14,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:15,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:15,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2018-11-06 22:49:15,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-06 22:49:15,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-06 22:49:15,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:49:15,591 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 28 states. [2018-11-06 22:49:16,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:16,807 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2018-11-06 22:49:16,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 22:49:16,808 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2018-11-06 22:49:16,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:16,809 INFO L225 Difference]: With dead ends: 66 [2018-11-06 22:49:16,809 INFO L226 Difference]: Without dead ends: 39 [2018-11-06 22:49:16,811 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2018-11-06 22:49:16,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-06 22:49:16,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-06 22:49:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-06 22:49:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-11-06 22:49:16,817 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-11-06 22:49:16,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:16,818 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-11-06 22:49:16,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-06 22:49:16,818 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-11-06 22:49:16,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-06 22:49:16,819 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:16,819 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:16,819 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:16,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:16,820 INFO L82 PathProgramCache]: Analyzing trace with hash 674378293, now seen corresponding path program 8 times [2018-11-06 22:49:16,820 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:16,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:16,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:16,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:49:16,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:17,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:17,004 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:49:17,013 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:49:17,031 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:49:17,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:17,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:17,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:17,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2018-11-06 22:49:17,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 22:49:17,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 22:49:17,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:49:17,268 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 22 states. [2018-11-06 22:49:17,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:17,672 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2018-11-06 22:49:17,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-06 22:49:17,673 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2018-11-06 22:49:17,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:17,673 INFO L225 Difference]: With dead ends: 52 [2018-11-06 22:49:17,674 INFO L226 Difference]: Without dead ends: 50 [2018-11-06 22:49:17,675 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 22:49:17,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-11-06 22:49:17,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2018-11-06 22:49:17,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-06 22:49:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-11-06 22:49:17,682 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2018-11-06 22:49:17,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:17,682 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-11-06 22:49:17,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 22:49:17,682 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-11-06 22:49:17,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-06 22:49:17,683 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:17,684 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:17,684 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:17,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:17,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1952666178, now seen corresponding path program 9 times [2018-11-06 22:49:17,684 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:17,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:17,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:17,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:17,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 36 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:18,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:18,247 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 22:49:18,255 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:49:18,303 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-06 22:49:18,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:18,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:18,782 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:18,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2018-11-06 22:49:18,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-06 22:49:18,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-06 22:49:18,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 22:49:18,784 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 34 states. [2018-11-06 22:49:20,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:20,280 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2018-11-06 22:49:20,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-06 22:49:20,281 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2018-11-06 22:49:20,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:20,282 INFO L225 Difference]: With dead ends: 76 [2018-11-06 22:49:20,282 INFO L226 Difference]: Without dead ends: 45 [2018-11-06 22:49:20,284 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=325, Invalid=2645, Unknown=0, NotChecked=0, Total=2970 [2018-11-06 22:49:20,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-06 22:49:20,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-06 22:49:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-06 22:49:20,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-11-06 22:49:20,292 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-11-06 22:49:20,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:20,292 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-11-06 22:49:20,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-06 22:49:20,293 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-11-06 22:49:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-06 22:49:20,294 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:20,294 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:20,294 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:20,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:20,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1743765864, now seen corresponding path program 10 times [2018-11-06 22:49:20,295 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:20,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:20,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:20,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:20,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 42 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:20,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:20,559 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 22:49:20,567 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:49:20,598 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:49:20,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:20,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:20,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:20,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2018-11-06 22:49:20,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-06 22:49:20,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-06 22:49:20,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2018-11-06 22:49:20,891 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 26 states. [2018-11-06 22:49:21,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:21,478 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2018-11-06 22:49:21,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-06 22:49:21,478 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2018-11-06 22:49:21,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:21,479 INFO L225 Difference]: With dead ends: 58 [2018-11-06 22:49:21,479 INFO L226 Difference]: Without dead ends: 56 [2018-11-06 22:49:21,480 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=1249, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:49:21,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-11-06 22:49:21,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2018-11-06 22:49:21,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-06 22:49:21,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-11-06 22:49:21,488 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2018-11-06 22:49:21,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:21,488 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-11-06 22:49:21,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-06 22:49:21,489 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-11-06 22:49:21,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-06 22:49:21,489 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:21,490 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:21,490 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:21,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:21,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1962422111, now seen corresponding path program 11 times [2018-11-06 22:49:21,490 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:21,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:21,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:21,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:21,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 55 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:22,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:22,108 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 22:49:22,116 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:49:22,140 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-11-06 22:49:22,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:22,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:22,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:22,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2018-11-06 22:49:22,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-06 22:49:22,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-06 22:49:22,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2018-11-06 22:49:22,674 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 36 states. [2018-11-06 22:49:23,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:23,837 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2018-11-06 22:49:23,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-06 22:49:23,837 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 48 [2018-11-06 22:49:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:23,838 INFO L225 Difference]: With dead ends: 86 [2018-11-06 22:49:23,838 INFO L226 Difference]: Without dead ends: 51 [2018-11-06 22:49:23,839 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=288, Invalid=2064, Unknown=0, NotChecked=0, Total=2352 [2018-11-06 22:49:23,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-06 22:49:23,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-06 22:49:23,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-06 22:49:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-11-06 22:49:23,847 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-11-06 22:49:23,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:23,847 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-11-06 22:49:23,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-06 22:49:23,847 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-11-06 22:49:23,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-11-06 22:49:23,848 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:23,848 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:23,849 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:23,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:23,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1029843461, now seen corresponding path program 12 times [2018-11-06 22:49:23,849 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:23,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:23,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:23,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:23,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 56 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:24,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:24,085 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 22:49:24,100 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:49:24,129 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-11-06 22:49:24,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:24,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:24,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:24,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 28 [2018-11-06 22:49:24,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-06 22:49:24,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-06 22:49:24,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:49:24,341 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 28 states. [2018-11-06 22:49:24,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:24,804 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2018-11-06 22:49:24,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 22:49:24,804 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 50 [2018-11-06 22:49:24,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:24,805 INFO L225 Difference]: With dead ends: 64 [2018-11-06 22:49:24,805 INFO L226 Difference]: Without dead ends: 62 [2018-11-06 22:49:24,807 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=373, Invalid=1519, Unknown=0, NotChecked=0, Total=1892 [2018-11-06 22:49:24,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-11-06 22:49:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2018-11-06 22:49:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-06 22:49:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-11-06 22:49:24,816 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2018-11-06 22:49:24,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:24,816 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-11-06 22:49:24,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-06 22:49:24,816 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-11-06 22:49:24,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-11-06 22:49:24,817 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:24,817 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:24,818 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:24,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:24,818 INFO L82 PathProgramCache]: Analyzing trace with hash -60490108, now seen corresponding path program 13 times [2018-11-06 22:49:24,818 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:24,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:24,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:24,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:24,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 78 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:25,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:25,644 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 22:49:25,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:49:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:25,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:26,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:26,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2018-11-06 22:49:26,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-06 22:49:26,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-06 22:49:26,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:49:26,300 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 40 states. [2018-11-06 22:49:27,005 WARN L179 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 13 [2018-11-06 22:49:27,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:27,857 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2018-11-06 22:49:27,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 22:49:27,858 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 54 [2018-11-06 22:49:27,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:27,858 INFO L225 Difference]: With dead ends: 96 [2018-11-06 22:49:27,858 INFO L226 Difference]: Without dead ends: 57 [2018-11-06 22:49:27,860 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=346, Invalid=2624, Unknown=0, NotChecked=0, Total=2970 [2018-11-06 22:49:27,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-11-06 22:49:27,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-11-06 22:49:27,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-11-06 22:49:27,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-11-06 22:49:27,868 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-11-06 22:49:27,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:27,868 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-11-06 22:49:27,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-06 22:49:27,868 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-11-06 22:49:27,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-06 22:49:27,869 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:27,869 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:27,869 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:27,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:27,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1013704610, now seen corresponding path program 14 times [2018-11-06 22:49:27,870 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:27,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:27,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:27,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:49:27,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 72 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:29,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:29,206 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 22:49:29,214 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:49:29,237 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:49:29,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:29,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:29,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:29,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 31 [2018-11-06 22:49:29,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-06 22:49:29,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-06 22:49:29,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:49:29,512 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 31 states. [2018-11-06 22:49:30,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:30,124 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2018-11-06 22:49:30,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-06 22:49:30,125 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 56 [2018-11-06 22:49:30,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:30,126 INFO L225 Difference]: With dead ends: 70 [2018-11-06 22:49:30,126 INFO L226 Difference]: Without dead ends: 68 [2018-11-06 22:49:30,127 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=455, Invalid=1897, Unknown=0, NotChecked=0, Total=2352 [2018-11-06 22:49:30,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-11-06 22:49:30,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2018-11-06 22:49:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-11-06 22:49:30,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-11-06 22:49:30,137 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2018-11-06 22:49:30,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:30,138 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-11-06 22:49:30,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-06 22:49:30,138 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-11-06 22:49:30,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-11-06 22:49:30,139 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:30,139 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:30,139 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:30,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:30,140 INFO L82 PathProgramCache]: Analyzing trace with hash 970807143, now seen corresponding path program 15 times [2018-11-06 22:49:30,140 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:30,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:30,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:30,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:30,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 105 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:31,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:31,481 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:49:31,490 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:49:31,519 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-11-06 22:49:31,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:31,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:32,299 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:32,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 45 [2018-11-06 22:49:32,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-06 22:49:32,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-06 22:49:32,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1692, Unknown=0, NotChecked=0, Total=1980 [2018-11-06 22:49:32,301 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 45 states. [2018-11-06 22:49:33,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:33,803 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2018-11-06 22:49:33,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-06 22:49:33,804 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 60 [2018-11-06 22:49:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:33,805 INFO L225 Difference]: With dead ends: 106 [2018-11-06 22:49:33,805 INFO L226 Difference]: Without dead ends: 63 [2018-11-06 22:49:33,808 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=527, Invalid=3633, Unknown=0, NotChecked=0, Total=4160 [2018-11-06 22:49:33,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-11-06 22:49:33,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-11-06 22:49:33,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-06 22:49:33,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-11-06 22:49:33,817 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-11-06 22:49:33,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:33,817 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-11-06 22:49:33,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-06 22:49:33,817 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-11-06 22:49:33,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-11-06 22:49:33,818 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:33,818 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:33,819 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:33,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:33,819 INFO L82 PathProgramCache]: Analyzing trace with hash 698623425, now seen corresponding path program 16 times [2018-11-06 22:49:33,819 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:33,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:33,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:33,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:33,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 90 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:34,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:34,188 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 22:49:34,198 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:49:34,224 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:49:34,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:34,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:34,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:34,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 35 [2018-11-06 22:49:34,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-06 22:49:34,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-06 22:49:34,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2018-11-06 22:49:34,752 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 35 states. [2018-11-06 22:49:35,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:35,335 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2018-11-06 22:49:35,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-06 22:49:35,336 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 62 [2018-11-06 22:49:35,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:35,337 INFO L225 Difference]: With dead ends: 76 [2018-11-06 22:49:35,337 INFO L226 Difference]: Without dead ends: 74 [2018-11-06 22:49:35,338 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=560, Invalid=2410, Unknown=0, NotChecked=0, Total=2970 [2018-11-06 22:49:35,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-11-06 22:49:35,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2018-11-06 22:49:35,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-06 22:49:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-11-06 22:49:35,348 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2018-11-06 22:49:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:35,349 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-11-06 22:49:35,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-06 22:49:35,349 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-11-06 22:49:35,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-11-06 22:49:35,350 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:35,350 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:35,350 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:35,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:35,351 INFO L82 PathProgramCache]: Analyzing trace with hash -728630454, now seen corresponding path program 17 times [2018-11-06 22:49:35,351 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:35,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:35,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:35,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:35,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 136 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:36,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:36,166 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 22:49:36,174 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:49:36,210 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-11-06 22:49:36,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:36,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:38,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:38,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 48 [2018-11-06 22:49:38,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-11-06 22:49:38,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-11-06 22:49:38,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1988, Unknown=0, NotChecked=0, Total=2256 [2018-11-06 22:49:38,233 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 48 states. [2018-11-06 22:49:39,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:39,700 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2018-11-06 22:49:39,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-06 22:49:39,701 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 66 [2018-11-06 22:49:39,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:39,702 INFO L225 Difference]: With dead ends: 116 [2018-11-06 22:49:39,702 INFO L226 Difference]: Without dead ends: 69 [2018-11-06 22:49:39,704 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=477, Invalid=3945, Unknown=0, NotChecked=0, Total=4422 [2018-11-06 22:49:39,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-11-06 22:49:39,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-11-06 22:49:39,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-06 22:49:39,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-11-06 22:49:39,711 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-11-06 22:49:39,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:39,712 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-11-06 22:49:39,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-11-06 22:49:39,712 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-11-06 22:49:39,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-11-06 22:49:39,712 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:39,712 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:39,712 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:39,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:39,713 INFO L82 PathProgramCache]: Analyzing trace with hash 880221732, now seen corresponding path program 18 times [2018-11-06 22:49:39,713 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:39,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:39,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:39,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:39,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 110 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:40,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:40,154 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 22:49:40,162 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:49:40,196 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-11-06 22:49:40,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:40,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 303 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:40,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:40,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2018-11-06 22:49:40,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-06 22:49:40,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-06 22:49:40,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2018-11-06 22:49:40,759 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 37 states. [2018-11-06 22:49:41,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:41,460 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2018-11-06 22:49:41,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-06 22:49:41,465 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 68 [2018-11-06 22:49:41,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:41,465 INFO L225 Difference]: With dead ends: 82 [2018-11-06 22:49:41,465 INFO L226 Difference]: Without dead ends: 80 [2018-11-06 22:49:41,467 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=643, Invalid=2779, Unknown=0, NotChecked=0, Total=3422 [2018-11-06 22:49:41,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-11-06 22:49:41,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2018-11-06 22:49:41,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-11-06 22:49:41,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-11-06 22:49:41,474 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2018-11-06 22:49:41,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:41,475 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-11-06 22:49:41,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-06 22:49:41,475 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-11-06 22:49:41,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-11-06 22:49:41,476 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:41,476 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:41,476 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:41,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:41,476 INFO L82 PathProgramCache]: Analyzing trace with hash -761525715, now seen corresponding path program 19 times [2018-11-06 22:49:41,476 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:41,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:41,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:41,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:41,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 171 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:42,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:42,337 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 22:49:42,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:49:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:42,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:43,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:43,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 52 [2018-11-06 22:49:43,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-11-06 22:49:43,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-11-06 22:49:43,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=2350, Unknown=0, NotChecked=0, Total=2652 [2018-11-06 22:49:43,309 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 52 states. [2018-11-06 22:49:45,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:45,076 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2018-11-06 22:49:45,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-06 22:49:45,077 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 72 [2018-11-06 22:49:45,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:45,078 INFO L225 Difference]: With dead ends: 126 [2018-11-06 22:49:45,078 INFO L226 Difference]: Without dead ends: 75 [2018-11-06 22:49:45,080 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=550, Invalid=4706, Unknown=0, NotChecked=0, Total=5256 [2018-11-06 22:49:45,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-06 22:49:45,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-06 22:49:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-06 22:49:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-11-06 22:49:45,088 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-11-06 22:49:45,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:45,089 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-11-06 22:49:45,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-11-06 22:49:45,089 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-11-06 22:49:45,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-11-06 22:49:45,089 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:45,089 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:45,089 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:45,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:45,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1834081913, now seen corresponding path program 20 times [2018-11-06 22:49:45,090 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:45,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:45,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:45,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:49:45,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 132 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:45,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:45,587 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 22:49:45,596 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:49:45,624 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:49:45,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:45,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:45,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:45,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 40 [2018-11-06 22:49:45,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-06 22:49:45,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-06 22:49:45,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:49:45,956 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 40 states. [2018-11-06 22:49:46,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:46,704 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2018-11-06 22:49:46,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-06 22:49:46,705 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 74 [2018-11-06 22:49:46,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:46,706 INFO L225 Difference]: With dead ends: 88 [2018-11-06 22:49:46,707 INFO L226 Difference]: Without dead ends: 86 [2018-11-06 22:49:46,708 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=749, Invalid=3283, Unknown=0, NotChecked=0, Total=4032 [2018-11-06 22:49:46,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-11-06 22:49:46,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2018-11-06 22:49:46,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-11-06 22:49:46,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-11-06 22:49:46,720 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2018-11-06 22:49:46,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:46,720 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-11-06 22:49:46,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-06 22:49:46,721 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-11-06 22:49:46,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-11-06 22:49:46,721 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:46,721 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:46,722 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:46,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:46,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1829544976, now seen corresponding path program 21 times [2018-11-06 22:49:46,722 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:46,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:46,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:46,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:46,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 210 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:49,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:49,112 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 22:49:49,120 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:49:49,164 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-11-06 22:49:49,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:49,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:50,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:50,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 57 [2018-11-06 22:49:50,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-11-06 22:49:50,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-11-06 22:49:50,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=2727, Unknown=0, NotChecked=0, Total=3192 [2018-11-06 22:49:50,350 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 57 states. [2018-11-06 22:49:52,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:52,126 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2018-11-06 22:49:52,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-06 22:49:52,126 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 78 [2018-11-06 22:49:52,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:52,127 INFO L225 Difference]: With dead ends: 136 [2018-11-06 22:49:52,127 INFO L226 Difference]: Without dead ends: 81 [2018-11-06 22:49:52,128 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=815, Invalid=5991, Unknown=0, NotChecked=0, Total=6806 [2018-11-06 22:49:52,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-06 22:49:52,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-11-06 22:49:52,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-11-06 22:49:52,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-11-06 22:49:52,139 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-11-06 22:49:52,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:52,139 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-11-06 22:49:52,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-11-06 22:49:52,139 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-11-06 22:49:52,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-11-06 22:49:52,140 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:52,140 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:52,140 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:52,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:52,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1612558358, now seen corresponding path program 22 times [2018-11-06 22:49:52,140 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:52,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:52,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:52,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:52,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 156 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:52,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:52,498 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 22:49:52,506 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:49:52,538 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:49:52,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:52,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:53,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:53,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 44 [2018-11-06 22:49:53,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-06 22:49:53,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-06 22:49:53,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1544, Unknown=0, NotChecked=0, Total=1892 [2018-11-06 22:49:53,042 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 44 states. [2018-11-06 22:49:53,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:53,901 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2018-11-06 22:49:53,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-06 22:49:53,901 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 80 [2018-11-06 22:49:53,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:53,902 INFO L225 Difference]: With dead ends: 94 [2018-11-06 22:49:53,903 INFO L226 Difference]: Without dead ends: 92 [2018-11-06 22:49:53,904 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=881, Invalid=3949, Unknown=0, NotChecked=0, Total=4830 [2018-11-06 22:49:53,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-11-06 22:49:53,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2018-11-06 22:49:53,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-06 22:49:53,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-11-06 22:49:53,919 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 80 [2018-11-06 22:49:53,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:53,919 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-11-06 22:49:53,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-06 22:49:53,919 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-11-06 22:49:53,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-11-06 22:49:53,920 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:53,920 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:53,920 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:53,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:53,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1307371763, now seen corresponding path program 23 times [2018-11-06 22:49:53,921 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:53,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:53,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:53,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:53,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 253 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:55,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:55,425 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 22:49:55,435 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:49:55,484 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-11-06 22:49:55,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:55,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:56,665 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:56,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 60 [2018-11-06 22:49:56,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-11-06 22:49:56,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-11-06 22:49:56,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=3140, Unknown=0, NotChecked=0, Total=3540 [2018-11-06 22:49:56,668 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 60 states. [2018-11-06 22:49:58,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:49:58,517 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2018-11-06 22:49:58,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-06 22:49:58,518 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 84 [2018-11-06 22:49:58,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:49:58,519 INFO L225 Difference]: With dead ends: 146 [2018-11-06 22:49:58,519 INFO L226 Difference]: Without dead ends: 87 [2018-11-06 22:49:58,521 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1675 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=711, Invalid=6429, Unknown=0, NotChecked=0, Total=7140 [2018-11-06 22:49:58,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-11-06 22:49:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-11-06 22:49:58,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-06 22:49:58,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-11-06 22:49:58,532 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-11-06 22:49:58,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:49:58,533 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-11-06 22:49:58,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-11-06 22:49:58,533 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-11-06 22:49:58,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-11-06 22:49:58,533 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:49:58,534 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:49:58,534 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:49:58,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:49:58,534 INFO L82 PathProgramCache]: Analyzing trace with hash 581224781, now seen corresponding path program 24 times [2018-11-06 22:49:58,534 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:49:58,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:49:58,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:58,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:49:58,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:49:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:49:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 182 proven. 328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:58,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:49:58,939 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 22:49:58,948 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:49:59,003 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-11-06 22:49:59,004 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:49:59,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:49:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:49:59,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:49:59,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 46 [2018-11-06 22:49:59,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-11-06 22:49:59,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-11-06 22:49:59,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1693, Unknown=0, NotChecked=0, Total=2070 [2018-11-06 22:49:59,458 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 46 states. [2018-11-06 22:50:00,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:00,624 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2018-11-06 22:50:00,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-06 22:50:00,624 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 86 [2018-11-06 22:50:00,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:00,625 INFO L225 Difference]: With dead ends: 100 [2018-11-06 22:50:00,625 INFO L226 Difference]: Without dead ends: 98 [2018-11-06 22:50:00,625 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=985, Invalid=4417, Unknown=0, NotChecked=0, Total=5402 [2018-11-06 22:50:00,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-11-06 22:50:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2018-11-06 22:50:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-11-06 22:50:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-11-06 22:50:00,639 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2018-11-06 22:50:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:00,639 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-11-06 22:50:00,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-11-06 22:50:00,639 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-11-06 22:50:00,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-11-06 22:50:00,640 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:00,640 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:00,640 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:00,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:00,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1312684246, now seen corresponding path program 25 times [2018-11-06 22:50:00,640 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:00,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:00,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:00,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:00,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 300 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:01,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:01,981 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 22:50:01,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:50:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:02,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:03,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:03,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 64 [2018-11-06 22:50:03,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-11-06 22:50:03,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-11-06 22:50:03,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=3592, Unknown=0, NotChecked=0, Total=4032 [2018-11-06 22:50:03,392 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 64 states. [2018-11-06 22:50:06,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:06,211 INFO L93 Difference]: Finished difference Result 156 states and 159 transitions. [2018-11-06 22:50:06,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-06 22:50:06,212 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 90 [2018-11-06 22:50:06,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:06,213 INFO L225 Difference]: With dead ends: 156 [2018-11-06 22:50:06,213 INFO L226 Difference]: Without dead ends: 93 [2018-11-06 22:50:06,215 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=799, Invalid=7391, Unknown=0, NotChecked=0, Total=8190 [2018-11-06 22:50:06,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-11-06 22:50:06,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-11-06 22:50:06,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-06 22:50:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-11-06 22:50:06,232 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-11-06 22:50:06,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:06,233 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-11-06 22:50:06,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-11-06 22:50:06,233 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-11-06 22:50:06,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-11-06 22:50:06,233 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:06,233 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:06,234 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:06,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:06,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1971409488, now seen corresponding path program 26 times [2018-11-06 22:50:06,234 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:06,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:06,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:06,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:50:06,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 210 proven. 381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:06,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:06,726 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 22:50:06,736 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:50:06,773 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:50:06,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:06,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 0 proven. 591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:07,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:07,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 49 [2018-11-06 22:50:07,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-11-06 22:50:07,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-11-06 22:50:07,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1926, Unknown=0, NotChecked=0, Total=2352 [2018-11-06 22:50:07,275 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 49 states. [2018-11-06 22:50:08,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:08,475 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2018-11-06 22:50:08,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-06 22:50:08,476 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 92 [2018-11-06 22:50:08,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:08,477 INFO L225 Difference]: With dead ends: 106 [2018-11-06 22:50:08,477 INFO L226 Difference]: Without dead ends: 104 [2018-11-06 22:50:08,479 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1115, Invalid=5047, Unknown=0, NotChecked=0, Total=6162 [2018-11-06 22:50:08,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-11-06 22:50:08,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2018-11-06 22:50:08,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-11-06 22:50:08,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-11-06 22:50:08,496 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2018-11-06 22:50:08,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:08,496 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-11-06 22:50:08,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-11-06 22:50:08,496 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-11-06 22:50:08,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-06 22:50:08,497 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:08,497 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:08,497 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:08,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:08,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1275530311, now seen corresponding path program 27 times [2018-11-06 22:50:08,498 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:08,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:08,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:08,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:08,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:09,699 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 351 proven. 295 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:09,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:09,700 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 22:50:09,708 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:50:09,763 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-11-06 22:50:09,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:09,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:11,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:11,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 69 [2018-11-06 22:50:11,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-11-06 22:50:11,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-11-06 22:50:11,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=4005, Unknown=0, NotChecked=0, Total=4692 [2018-11-06 22:50:11,237 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 69 states. [2018-11-06 22:50:14,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:14,123 INFO L93 Difference]: Finished difference Result 166 states and 169 transitions. [2018-11-06 22:50:14,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-06 22:50:14,123 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 96 [2018-11-06 22:50:14,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:14,124 INFO L225 Difference]: With dead ends: 166 [2018-11-06 22:50:14,124 INFO L226 Difference]: Without dead ends: 99 [2018-11-06 22:50:14,125 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3184 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1166, Invalid=8934, Unknown=0, NotChecked=0, Total=10100 [2018-11-06 22:50:14,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-11-06 22:50:14,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-11-06 22:50:14,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-11-06 22:50:14,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-11-06 22:50:14,141 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-11-06 22:50:14,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:14,141 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-11-06 22:50:14,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-11-06 22:50:14,142 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-11-06 22:50:14,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-11-06 22:50:14,142 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:14,142 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:14,142 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:14,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:14,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1376707309, now seen corresponding path program 28 times [2018-11-06 22:50:14,143 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:14,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:14,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:14,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:14,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 240 proven. 438 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:14,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:14,671 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:50:14,680 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:50:14,724 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:50:14,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:14,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 0 proven. 678 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:15,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:15,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 53 [2018-11-06 22:50:15,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-11-06 22:50:15,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-11-06 22:50:15,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=2258, Unknown=0, NotChecked=0, Total=2756 [2018-11-06 22:50:15,540 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 53 states. [2018-11-06 22:50:16,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:16,669 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2018-11-06 22:50:16,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-06 22:50:16,669 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 98 [2018-11-06 22:50:16,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:16,671 INFO L225 Difference]: With dead ends: 112 [2018-11-06 22:50:16,671 INFO L226 Difference]: Without dead ends: 110 [2018-11-06 22:50:16,672 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1743 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1274, Invalid=5866, Unknown=0, NotChecked=0, Total=7140 [2018-11-06 22:50:16,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-11-06 22:50:16,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2018-11-06 22:50:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-11-06 22:50:16,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-11-06 22:50:16,693 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2018-11-06 22:50:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:16,694 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-11-06 22:50:16,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-11-06 22:50:16,694 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-11-06 22:50:16,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-11-06 22:50:16,695 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:16,695 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:16,695 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:16,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:16,695 INFO L82 PathProgramCache]: Analyzing trace with hash -267454052, now seen corresponding path program 29 times [2018-11-06 22:50:16,695 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:16,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:16,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:16,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:16,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 406 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:18,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:18,280 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 22:50:18,288 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:50:18,347 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2018-11-06 22:50:18,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:18,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:19,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:19,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 72 [2018-11-06 22:50:19,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-11-06 22:50:19,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-11-06 22:50:19,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=4553, Unknown=0, NotChecked=0, Total=5112 [2018-11-06 22:50:19,917 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 72 states. [2018-11-06 22:50:23,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:23,277 INFO L93 Difference]: Finished difference Result 176 states and 179 transitions. [2018-11-06 22:50:23,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-06 22:50:23,277 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 102 [2018-11-06 22:50:23,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:23,279 INFO L225 Difference]: With dead ends: 176 [2018-11-06 22:50:23,279 INFO L226 Difference]: Without dead ends: 105 [2018-11-06 22:50:23,280 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2518 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=990, Invalid=9516, Unknown=0, NotChecked=0, Total=10506 [2018-11-06 22:50:23,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-11-06 22:50:23,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-11-06 22:50:23,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-11-06 22:50:23,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-11-06 22:50:23,300 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-11-06 22:50:23,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:23,300 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-11-06 22:50:23,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-11-06 22:50:23,300 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-11-06 22:50:23,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-11-06 22:50:23,301 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:23,301 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:23,301 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:23,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:23,301 INFO L82 PathProgramCache]: Analyzing trace with hash 141899638, now seen corresponding path program 30 times [2018-11-06 22:50:23,302 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:23,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:23,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:23,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:23,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 272 proven. 499 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:24,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:24,031 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 22:50:24,039 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:50:24,100 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-11-06 22:50:24,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:24,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 771 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:24,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:24,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 55 [2018-11-06 22:50:24,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-11-06 22:50:24,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-11-06 22:50:24,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=2437, Unknown=0, NotChecked=0, Total=2970 [2018-11-06 22:50:24,760 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 55 states. [2018-11-06 22:50:26,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:26,407 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2018-11-06 22:50:26,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-06 22:50:26,408 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 104 [2018-11-06 22:50:26,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:26,409 INFO L225 Difference]: With dead ends: 118 [2018-11-06 22:50:26,409 INFO L226 Difference]: Without dead ends: 116 [2018-11-06 22:50:26,409 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1399, Invalid=6433, Unknown=0, NotChecked=0, Total=7832 [2018-11-06 22:50:26,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-11-06 22:50:26,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2018-11-06 22:50:26,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-11-06 22:50:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-11-06 22:50:26,427 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2018-11-06 22:50:26,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:26,427 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-11-06 22:50:26,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-11-06 22:50:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-11-06 22:50:26,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-11-06 22:50:26,428 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:26,428 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:26,428 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:26,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:26,429 INFO L82 PathProgramCache]: Analyzing trace with hash -597087617, now seen corresponding path program 31 times [2018-11-06 22:50:26,429 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:26,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:26,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:26,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:26,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 465 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:27,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:27,995 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 22:50:28,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:50:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:28,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 0 proven. 834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:30,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:30,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 76 [2018-11-06 22:50:30,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-11-06 22:50:30,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-11-06 22:50:30,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=5095, Unknown=0, NotChecked=0, Total=5700 [2018-11-06 22:50:30,080 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 76 states. [2018-11-06 22:50:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:33,622 INFO L93 Difference]: Finished difference Result 186 states and 189 transitions. [2018-11-06 22:50:33,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-06 22:50:33,622 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 108 [2018-11-06 22:50:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:33,623 INFO L225 Difference]: With dead ends: 186 [2018-11-06 22:50:33,623 INFO L226 Difference]: Without dead ends: 111 [2018-11-06 22:50:33,624 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2837 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1093, Invalid=10679, Unknown=0, NotChecked=0, Total=11772 [2018-11-06 22:50:33,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-11-06 22:50:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-11-06 22:50:33,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-11-06 22:50:33,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-11-06 22:50:33,648 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-11-06 22:50:33,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:33,648 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-11-06 22:50:33,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-11-06 22:50:33,648 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-11-06 22:50:33,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-11-06 22:50:33,649 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:33,649 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:33,649 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:33,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:33,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2021399769, now seen corresponding path program 32 times [2018-11-06 22:50:33,650 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:33,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:33,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:33,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:50:33,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 306 proven. 564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:34,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:34,211 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:50:34,219 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:50:34,271 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:50:34,271 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:34,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:35,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:35,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 58 [2018-11-06 22:50:35,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-11-06 22:50:35,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-11-06 22:50:35,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=2715, Unknown=0, NotChecked=0, Total=3306 [2018-11-06 22:50:35,224 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 58 states. [2018-11-06 22:50:36,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:36,784 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2018-11-06 22:50:36,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-06 22:50:36,786 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 110 [2018-11-06 22:50:36,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:36,787 INFO L225 Difference]: With dead ends: 124 [2018-11-06 22:50:36,788 INFO L226 Difference]: Without dead ends: 122 [2018-11-06 22:50:36,788 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2093 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1553, Invalid=7189, Unknown=0, NotChecked=0, Total=8742 [2018-11-06 22:50:36,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-11-06 22:50:36,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2018-11-06 22:50:36,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-11-06 22:50:36,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-11-06 22:50:36,812 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110 [2018-11-06 22:50:36,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:36,813 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-11-06 22:50:36,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-11-06 22:50:36,813 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-11-06 22:50:36,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-11-06 22:50:36,814 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:36,814 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:36,814 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:36,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:36,814 INFO L82 PathProgramCache]: Analyzing trace with hash 2045290082, now seen corresponding path program 33 times [2018-11-06 22:50:36,814 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:36,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:36,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:36,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:36,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 528 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:38,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:38,421 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 22:50:38,428 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:50:38,491 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-11-06 22:50:38,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:38,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:40,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:40,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 81 [2018-11-06 22:50:40,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-11-06 22:50:40,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-11-06 22:50:40,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=5526, Unknown=0, NotChecked=0, Total=6480 [2018-11-06 22:50:40,122 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 81 states. [2018-11-06 22:50:44,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:44,622 INFO L93 Difference]: Finished difference Result 196 states and 199 transitions. [2018-11-06 22:50:44,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-11-06 22:50:44,622 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 114 [2018-11-06 22:50:44,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:44,623 INFO L225 Difference]: With dead ends: 196 [2018-11-06 22:50:44,623 INFO L226 Difference]: Without dead ends: 117 [2018-11-06 22:50:44,624 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4552 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1580, Invalid=12462, Unknown=0, NotChecked=0, Total=14042 [2018-11-06 22:50:44,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-11-06 22:50:44,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-11-06 22:50:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-11-06 22:50:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-11-06 22:50:44,651 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-11-06 22:50:44,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:44,651 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-11-06 22:50:44,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-11-06 22:50:44,652 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-11-06 22:50:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-11-06 22:50:44,652 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:44,652 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:44,653 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:44,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:44,653 INFO L82 PathProgramCache]: Analyzing trace with hash 2104421692, now seen corresponding path program 34 times [2018-11-06 22:50:44,653 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:44,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:44,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:44,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:44,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 342 proven. 633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:45,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:45,579 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:50:45,587 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:50:45,637 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:50:45,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:45,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:46,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:46,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 62 [2018-11-06 22:50:46,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-11-06 22:50:46,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-11-06 22:50:46,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=3107, Unknown=0, NotChecked=0, Total=3782 [2018-11-06 22:50:46,752 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 62 states. [2018-11-06 22:50:48,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:48,295 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2018-11-06 22:50:48,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-06 22:50:48,296 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 116 [2018-11-06 22:50:48,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:48,297 INFO L225 Difference]: With dead ends: 130 [2018-11-06 22:50:48,297 INFO L226 Difference]: Without dead ends: 128 [2018-11-06 22:50:48,299 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2442 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1739, Invalid=8161, Unknown=0, NotChecked=0, Total=9900 [2018-11-06 22:50:48,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-11-06 22:50:48,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 121. [2018-11-06 22:50:48,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-11-06 22:50:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-11-06 22:50:48,324 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2018-11-06 22:50:48,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:48,325 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-11-06 22:50:48,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-11-06 22:50:48,325 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-11-06 22:50:48,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-11-06 22:50:48,325 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:48,325 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:48,326 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:48,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:48,326 INFO L82 PathProgramCache]: Analyzing trace with hash 778472773, now seen corresponding path program 35 times [2018-11-06 22:50:48,326 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:48,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:48,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:48,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:48,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 595 proven. 451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:50,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:50,146 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 22:50:50,154 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:50:50,221 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-11-06 22:50:50,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:50,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 0 proven. 1046 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:53,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:53,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 84 [2018-11-06 22:50:53,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-11-06 22:50:53,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-11-06 22:50:53,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=6227, Unknown=0, NotChecked=0, Total=6972 [2018-11-06 22:50:53,725 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 84 states. [2018-11-06 22:50:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:58,377 INFO L93 Difference]: Finished difference Result 206 states and 209 transitions. [2018-11-06 22:50:58,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-06 22:50:58,377 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 120 [2018-11-06 22:50:58,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:58,378 INFO L225 Difference]: With dead ends: 206 [2018-11-06 22:50:58,378 INFO L226 Difference]: Without dead ends: 123 [2018-11-06 22:50:58,379 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3532 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1314, Invalid=13206, Unknown=0, NotChecked=0, Total=14520 [2018-11-06 22:50:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-11-06 22:50:58,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-11-06 22:50:58,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-11-06 22:50:58,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-11-06 22:50:58,402 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-11-06 22:50:58,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:58,402 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-11-06 22:50:58,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-11-06 22:50:58,402 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-11-06 22:50:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-11-06 22:50:58,403 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:58,403 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:58,404 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:58,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:58,404 INFO L82 PathProgramCache]: Analyzing trace with hash -173094753, now seen corresponding path program 36 times [2018-11-06 22:50:58,404 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:58,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:58,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:58,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:58,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:59,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 380 proven. 706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:59,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:59,083 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 22:50:59,093 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:50:59,163 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-11-06 22:50:59,163 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:59,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 1086 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:00,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:00,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 64 [2018-11-06 22:51:00,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-11-06 22:51:00,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-11-06 22:51:00,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=716, Invalid=3316, Unknown=0, NotChecked=0, Total=4032 [2018-11-06 22:51:00,008 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 64 states. [2018-11-06 22:51:01,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:01,857 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2018-11-06 22:51:01,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-06 22:51:01,857 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 122 [2018-11-06 22:51:01,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:01,859 INFO L225 Difference]: With dead ends: 136 [2018-11-06 22:51:01,859 INFO L226 Difference]: Without dead ends: 134 [2018-11-06 22:51:01,860 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2586 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1885, Invalid=8827, Unknown=0, NotChecked=0, Total=10712 [2018-11-06 22:51:01,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-11-06 22:51:01,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2018-11-06 22:51:01,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-11-06 22:51:01,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-11-06 22:51:01,887 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 122 [2018-11-06 22:51:01,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:01,888 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-11-06 22:51:01,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-11-06 22:51:01,888 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-11-06 22:51:01,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-11-06 22:51:01,889 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:01,889 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:01,889 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:01,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:01,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2102132952, now seen corresponding path program 37 times [2018-11-06 22:51:01,890 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:01,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:01,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:01,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:01,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 666 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:03,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:03,700 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 22:51:03,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:51:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:03,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 1161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:06,503 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:06,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 88 [2018-11-06 22:51:06,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-11-06 22:51:06,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-11-06 22:51:06,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=797, Invalid=6859, Unknown=0, NotChecked=0, Total=7656 [2018-11-06 22:51:06,505 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 88 states. [2018-11-06 22:51:11,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:11,191 INFO L93 Difference]: Finished difference Result 216 states and 219 transitions. [2018-11-06 22:51:11,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-06 22:51:11,192 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 126 [2018-11-06 22:51:11,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:11,192 INFO L225 Difference]: With dead ends: 216 [2018-11-06 22:51:11,192 INFO L226 Difference]: Without dead ends: 129 [2018-11-06 22:51:11,193 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3908 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1432, Invalid=14570, Unknown=0, NotChecked=0, Total=16002 [2018-11-06 22:51:11,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-11-06 22:51:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-11-06 22:51:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-11-06 22:51:11,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-11-06 22:51:11,228 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-11-06 22:51:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:11,228 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-11-06 22:51:11,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-11-06 22:51:11,229 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-11-06 22:51:11,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-11-06 22:51:11,229 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:11,230 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:11,230 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:11,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:11,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1553256194, now seen corresponding path program 38 times [2018-11-06 22:51:11,230 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:11,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:11,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:11,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:51:11,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 420 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:12,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:12,345 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 22:51:12,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:51:12,411 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:51:12,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:12,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:13,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 0 proven. 1203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:13,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:13,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 67 [2018-11-06 22:51:13,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-11-06 22:51:13,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-11-06 22:51:13,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=3639, Unknown=0, NotChecked=0, Total=4422 [2018-11-06 22:51:13,303 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 67 states. [2018-11-06 22:51:15,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:15,099 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2018-11-06 22:51:15,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-11-06 22:51:15,099 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 128 [2018-11-06 22:51:15,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:15,101 INFO L225 Difference]: With dead ends: 142 [2018-11-06 22:51:15,101 INFO L226 Difference]: Without dead ends: 140 [2018-11-06 22:51:15,102 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2852 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2063, Invalid=9709, Unknown=0, NotChecked=0, Total=11772 [2018-11-06 22:51:15,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-11-06 22:51:15,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 133. [2018-11-06 22:51:15,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-11-06 22:51:15,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-11-06 22:51:15,135 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 128 [2018-11-06 22:51:15,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:15,136 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-11-06 22:51:15,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-11-06 22:51:15,136 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-11-06 22:51:15,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-11-06 22:51:15,137 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:15,137 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:15,137 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:15,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:15,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1620712459, now seen corresponding path program 39 times [2018-11-06 22:51:15,137 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:15,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:15,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:15,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:15,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 741 proven. 541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:17,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:17,522 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 22:51:17,531 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:51:17,622 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-11-06 22:51:17,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:17,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:19,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 0 proven. 1282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:19,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:19,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 72 [2018-11-06 22:51:19,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-11-06 22:51:19,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-11-06 22:51:19,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=862, Invalid=4250, Unknown=0, NotChecked=0, Total=5112 [2018-11-06 22:51:19,036 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 72 states. [2018-11-06 22:51:22,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:22,832 INFO L93 Difference]: Finished difference Result 226 states and 229 transitions. [2018-11-06 22:51:22,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-11-06 22:51:22,832 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 132 [2018-11-06 22:51:22,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:22,833 INFO L225 Difference]: With dead ends: 226 [2018-11-06 22:51:22,833 INFO L226 Difference]: Without dead ends: 135 [2018-11-06 22:51:22,834 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3104 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1604, Invalid=11278, Unknown=0, NotChecked=0, Total=12882 [2018-11-06 22:51:22,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-11-06 22:51:22,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-11-06 22:51:22,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-11-06 22:51:22,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-11-06 22:51:22,858 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-11-06 22:51:22,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:22,859 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-11-06 22:51:22,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-11-06 22:51:22,859 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-11-06 22:51:22,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-11-06 22:51:22,859 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:22,859 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:22,860 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:22,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:22,860 INFO L82 PathProgramCache]: Analyzing trace with hash -2005786523, now seen corresponding path program 40 times [2018-11-06 22:51:22,860 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:22,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:22,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:22,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:22,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 462 proven. 864 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:24,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:24,818 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 22:51:24,826 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:51:24,881 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:51:24,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:24,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:25,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:25,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 71 [2018-11-06 22:51:25,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-11-06 22:51:25,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-11-06 22:51:25,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=879, Invalid=4091, Unknown=0, NotChecked=0, Total=4970 [2018-11-06 22:51:25,876 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 71 states. [2018-11-06 22:51:28,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:28,368 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2018-11-06 22:51:28,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-06 22:51:28,368 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 134 [2018-11-06 22:51:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:28,369 INFO L225 Difference]: With dead ends: 148 [2018-11-06 22:51:28,369 INFO L226 Difference]: Without dead ends: 146 [2018-11-06 22:51:28,370 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2276, Invalid=10834, Unknown=0, NotChecked=0, Total=13110 [2018-11-06 22:51:28,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-11-06 22:51:28,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2018-11-06 22:51:28,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-11-06 22:51:28,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-11-06 22:51:28,400 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2018-11-06 22:51:28,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:28,400 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-11-06 22:51:28,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-11-06 22:51:28,400 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-11-06 22:51:28,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-11-06 22:51:28,401 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:28,401 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:28,401 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:28,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:28,401 INFO L82 PathProgramCache]: Analyzing trace with hash -791018514, now seen corresponding path program 41 times [2018-11-06 22:51:28,402 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:28,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:28,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:28,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:28,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 820 proven. 589 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:30,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:30,715 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 22:51:30,723 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:51:30,807 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-11-06 22:51:30,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:30,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 0 proven. 1409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:33,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:33,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 96 [2018-11-06 22:51:33,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-11-06 22:51:33,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-11-06 22:51:33,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=958, Invalid=8162, Unknown=0, NotChecked=0, Total=9120 [2018-11-06 22:51:33,786 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 96 states. [2018-11-06 22:51:38,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:38,661 INFO L93 Difference]: Finished difference Result 236 states and 239 transitions. [2018-11-06 22:51:38,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-06 22:51:38,662 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 138 [2018-11-06 22:51:38,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:38,662 INFO L225 Difference]: With dead ends: 236 [2018-11-06 22:51:38,662 INFO L226 Difference]: Without dead ends: 141 [2018-11-06 22:51:38,663 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4717 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1683, Invalid=17499, Unknown=0, NotChecked=0, Total=19182 [2018-11-06 22:51:38,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-11-06 22:51:38,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-11-06 22:51:38,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-11-06 22:51:38,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-11-06 22:51:38,690 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-11-06 22:51:38,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:38,691 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-11-06 22:51:38,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-11-06 22:51:38,691 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-11-06 22:51:38,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-11-06 22:51:38,691 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:38,691 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:38,692 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:38,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:38,692 INFO L82 PathProgramCache]: Analyzing trace with hash -393225016, now seen corresponding path program 42 times [2018-11-06 22:51:38,692 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:38,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:38,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:38,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:38,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 506 proven. 949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:39,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:39,833 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 22:51:39,844 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:51:39,930 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-11-06 22:51:39,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:39,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 0 proven. 1455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:41,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:41,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 73 [2018-11-06 22:51:41,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-11-06 22:51:41,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-11-06 22:51:41,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=926, Invalid=4330, Unknown=0, NotChecked=0, Total=5256 [2018-11-06 22:51:41,041 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 73 states. [2018-11-06 22:51:43,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:43,200 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2018-11-06 22:51:43,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-06 22:51:43,200 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 140 [2018-11-06 22:51:43,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:43,201 INFO L225 Difference]: With dead ends: 154 [2018-11-06 22:51:43,201 INFO L226 Difference]: Without dead ends: 152 [2018-11-06 22:51:43,202 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2443, Invalid=11599, Unknown=0, NotChecked=0, Total=14042 [2018-11-06 22:51:43,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-11-06 22:51:43,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 145. [2018-11-06 22:51:43,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-11-06 22:51:43,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-11-06 22:51:43,231 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2018-11-06 22:51:43,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:43,231 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-11-06 22:51:43,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-11-06 22:51:43,231 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-11-06 22:51:43,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-11-06 22:51:43,232 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:43,232 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:43,232 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:43,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:43,232 INFO L82 PathProgramCache]: Analyzing trace with hash 959239889, now seen corresponding path program 43 times [2018-11-06 22:51:43,233 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:43,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:43,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:43,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:43,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 903 proven. 639 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:46,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:46,794 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 22:51:46,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:51:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:46,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 0 proven. 1542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:51,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:51,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 100 [2018-11-06 22:51:51,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-11-06 22:51:51,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-11-06 22:51:51,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=8884, Unknown=0, NotChecked=0, Total=9900 [2018-11-06 22:51:51,055 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 100 states. [2018-11-06 22:51:57,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:57,505 INFO L93 Difference]: Finished difference Result 246 states and 249 transitions. [2018-11-06 22:51:57,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-06 22:51:57,506 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 144 [2018-11-06 22:51:57,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:57,506 INFO L225 Difference]: With dead ends: 246 [2018-11-06 22:51:57,506 INFO L226 Difference]: Without dead ends: 147 [2018-11-06 22:51:57,507 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1816, Invalid=19064, Unknown=0, NotChecked=0, Total=20880 [2018-11-06 22:51:57,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-11-06 22:51:57,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-11-06 22:51:57,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-11-06 22:51:57,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-11-06 22:51:57,537 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-11-06 22:51:57,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:57,537 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-11-06 22:51:57,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-11-06 22:51:57,537 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-11-06 22:51:57,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-11-06 22:51:57,537 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:57,538 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:57,538 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:57,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:57,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1127162923, now seen corresponding path program 44 times [2018-11-06 22:51:57,538 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:57,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:57,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:57,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:51:57,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 552 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:58,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:58,660 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 22:51:58,670 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:51:58,729 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:51:58,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:58,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 0 proven. 1590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:59,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:59,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 76 [2018-11-06 22:51:59,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-11-06 22:51:59,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-11-06 22:51:59,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1002, Invalid=4698, Unknown=0, NotChecked=0, Total=5700 [2018-11-06 22:51:59,874 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 76 states. [2018-11-06 22:52:02,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:02,041 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2018-11-06 22:52:02,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-06 22:52:02,041 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 146 [2018-11-06 22:52:02,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:02,042 INFO L225 Difference]: With dead ends: 160 [2018-11-06 22:52:02,042 INFO L226 Difference]: Without dead ends: 158 [2018-11-06 22:52:02,043 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3728 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2645, Invalid=12607, Unknown=0, NotChecked=0, Total=15252 [2018-11-06 22:52:02,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-11-06 22:52:02,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 151. [2018-11-06 22:52:02,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-11-06 22:52:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-11-06 22:52:02,074 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 146 [2018-11-06 22:52:02,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:02,075 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-11-06 22:52:02,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-11-06 22:52:02,075 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-11-06 22:52:02,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-11-06 22:52:02,075 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:02,076 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:02,076 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:02,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:02,076 INFO L82 PathProgramCache]: Analyzing trace with hash 440644788, now seen corresponding path program 45 times [2018-11-06 22:52:02,076 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:02,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:02,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:02,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:52:02,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 990 proven. 691 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:04,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:04,633 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 22:52:04,642 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:52:04,734 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-11-06 22:52:04,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:52:04,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:08,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:08,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 105 [2018-11-06 22:52:08,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-11-06 22:52:08,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-11-06 22:52:08,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=9297, Unknown=0, NotChecked=0, Total=10920 [2018-11-06 22:52:08,491 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 105 states. [2018-11-06 22:52:14,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:14,058 INFO L93 Difference]: Finished difference Result 256 states and 259 transitions. [2018-11-06 22:52:14,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-11-06 22:52:14,058 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 150 [2018-11-06 22:52:14,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:14,059 INFO L225 Difference]: With dead ends: 256 [2018-11-06 22:52:14,059 INFO L226 Difference]: Without dead ends: 153 [2018-11-06 22:52:14,060 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8017 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=2597, Invalid=21273, Unknown=0, NotChecked=0, Total=23870 [2018-11-06 22:52:14,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-11-06 22:52:14,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-11-06 22:52:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-11-06 22:52:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-11-06 22:52:14,092 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-11-06 22:52:14,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:14,092 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-11-06 22:52:14,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-11-06 22:52:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-11-06 22:52:14,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-11-06 22:52:14,093 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:14,093 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:14,093 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:14,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:14,094 INFO L82 PathProgramCache]: Analyzing trace with hash -209119602, now seen corresponding path program 46 times [2018-11-06 22:52:14,094 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:14,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:14,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:14,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:52:14,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 600 proven. 1131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:15,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:15,007 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 22:52:15,017 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:52:15,076 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:52:15,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:52:15,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 0 proven. 1731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:16,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:16,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 80 [2018-11-06 22:52:16,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-11-06 22:52:16,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-11-06 22:52:16,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1110, Invalid=5210, Unknown=0, NotChecked=0, Total=6320 [2018-11-06 22:52:16,395 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 80 states. [2018-11-06 22:52:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:19,005 INFO L93 Difference]: Finished difference Result 166 states and 167 transitions. [2018-11-06 22:52:19,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-11-06 22:52:19,005 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 152 [2018-11-06 22:52:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:19,006 INFO L225 Difference]: With dead ends: 166 [2018-11-06 22:52:19,006 INFO L226 Difference]: Without dead ends: 164 [2018-11-06 22:52:19,007 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4191 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2885, Invalid=13885, Unknown=0, NotChecked=0, Total=16770 [2018-11-06 22:52:19,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-11-06 22:52:19,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 157. [2018-11-06 22:52:19,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-11-06 22:52:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-11-06 22:52:19,039 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 152 [2018-11-06 22:52:19,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:19,040 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-11-06 22:52:19,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-11-06 22:52:19,040 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-11-06 22:52:19,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-11-06 22:52:19,040 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:19,041 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:19,041 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:19,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:19,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1304935831, now seen corresponding path program 47 times [2018-11-06 22:52:19,041 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:19,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:19,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:19,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:52:19,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 1081 proven. 745 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:21,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:21,430 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:21,438 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:52:21,536 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-11-06 22:52:21,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:52:21,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 0 proven. 1826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:25,313 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:25,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 108 [2018-11-06 22:52:25,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-11-06 22:52:25,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-11-06 22:52:25,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1198, Invalid=10358, Unknown=0, NotChecked=0, Total=11556 [2018-11-06 22:52:25,315 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 108 states. [2018-11-06 22:52:32,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:32,743 INFO L93 Difference]: Finished difference Result 266 states and 269 transitions. [2018-11-06 22:52:32,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-11-06 22:52:32,743 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 156 [2018-11-06 22:52:32,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:32,744 INFO L225 Difference]: With dead ends: 266 [2018-11-06 22:52:32,744 INFO L226 Difference]: Without dead ends: 159 [2018-11-06 22:52:32,746 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6073 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2097, Invalid=22395, Unknown=0, NotChecked=0, Total=24492 [2018-11-06 22:52:32,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-11-06 22:52:32,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-11-06 22:52:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-11-06 22:52:32,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-11-06 22:52:32,780 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-11-06 22:52:32,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:32,780 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-11-06 22:52:32,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-11-06 22:52:32,780 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-11-06 22:52:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-11-06 22:52:32,781 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:32,781 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:32,781 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:32,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:32,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1479617551, now seen corresponding path program 48 times [2018-11-06 22:52:32,782 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:32,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:32,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:32,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:52:32,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 650 proven. 1228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:34,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:34,407 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:34,415 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:52:34,514 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-11-06 22:52:34,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:52:34,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 0 proven. 1878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:35,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:35,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 82 [2018-11-06 22:52:35,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-11-06 22:52:35,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-11-06 22:52:35,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1163, Invalid=5479, Unknown=0, NotChecked=0, Total=6642 [2018-11-06 22:52:35,816 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 82 states. [2018-11-06 22:52:38,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:38,301 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2018-11-06 22:52:38,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-11-06 22:52:38,302 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 158 [2018-11-06 22:52:38,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:38,303 INFO L225 Difference]: With dead ends: 172 [2018-11-06 22:52:38,303 INFO L226 Difference]: Without dead ends: 170 [2018-11-06 22:52:38,304 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4377 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3073, Invalid=14749, Unknown=0, NotChecked=0, Total=17822 [2018-11-06 22:52:38,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-11-06 22:52:38,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 163. [2018-11-06 22:52:38,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-11-06 22:52:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-11-06 22:52:38,341 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 158 [2018-11-06 22:52:38,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:38,341 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-11-06 22:52:38,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-11-06 22:52:38,341 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-11-06 22:52:38,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-11-06 22:52:38,342 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:38,342 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:38,342 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:38,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:38,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1000730246, now seen corresponding path program 49 times [2018-11-06 22:52:38,343 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:38,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:38,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:38,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:52:38,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 1176 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:41,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:41,024 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:41,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:52:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:41,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1977 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:45,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:45,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 112 [2018-11-06 22:52:45,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-11-06 22:52:45,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-11-06 22:52:45,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1262, Invalid=11170, Unknown=0, NotChecked=0, Total=12432 [2018-11-06 22:52:45,232 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 112 states. [2018-11-06 22:52:52,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:52,821 INFO L93 Difference]: Finished difference Result 276 states and 279 transitions. [2018-11-06 22:52:52,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-11-06 22:52:52,822 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 162 [2018-11-06 22:52:52,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:52,823 INFO L225 Difference]: With dead ends: 276 [2018-11-06 22:52:52,823 INFO L226 Difference]: Without dead ends: 165 [2018-11-06 22:52:52,825 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6563 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=2245, Invalid=24161, Unknown=0, NotChecked=0, Total=26406 [2018-11-06 22:52:52,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-11-06 22:52:52,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-11-06 22:52:52,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-11-06 22:52:52,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-11-06 22:52:52,861 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-11-06 22:52:52,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:52,861 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-11-06 22:52:52,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-11-06 22:52:52,861 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-11-06 22:52:52,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-11-06 22:52:52,862 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:52,862 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:52,863 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:52,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:52,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1624671148, now seen corresponding path program 50 times [2018-11-06 22:52:52,863 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:52,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:52,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:52,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:52:52,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2031 backedges. 702 proven. 1329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:54,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:54,408 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:54,416 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:52:54,483 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:52:54,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:52:54,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2031 backedges. 0 proven. 2031 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:55,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:55,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 85 [2018-11-06 22:52:55,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-11-06 22:52:55,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-11-06 22:52:55,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1248, Invalid=5892, Unknown=0, NotChecked=0, Total=7140 [2018-11-06 22:52:55,891 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 85 states. [2018-11-06 22:52:58,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:58,647 INFO L93 Difference]: Finished difference Result 178 states and 179 transitions. [2018-11-06 22:52:58,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-11-06 22:52:58,647 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 164 [2018-11-06 22:52:58,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:58,648 INFO L225 Difference]: With dead ends: 178 [2018-11-06 22:52:58,649 INFO L226 Difference]: Without dead ends: 176 [2018-11-06 22:52:58,650 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4721 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3299, Invalid=15883, Unknown=0, NotChecked=0, Total=19182 [2018-11-06 22:52:58,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-11-06 22:52:58,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 169. [2018-11-06 22:52:58,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-11-06 22:52:58,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-11-06 22:52:58,706 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2018-11-06 22:52:58,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:58,706 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-11-06 22:52:58,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-11-06 22:52:58,706 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-11-06 22:52:58,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-11-06 22:52:58,707 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:58,707 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:58,707 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:58,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:58,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1013723043, now seen corresponding path program 51 times [2018-11-06 22:52:58,708 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:58,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:58,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:58,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:52:58,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 1275 proven. 859 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:01,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:01,650 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:53:01,658 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:53:01,761 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-11-06 22:53:01,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:01,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2018-11-06 22:53:03,594 WARN L187 SmtUtils]: Removed 1 from assertion stack [2018-11-06 22:53:03,594 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-11-06 22:53:03,795 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:53:03,795 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-06 22:53:03,802 WARN L205 ceAbstractionStarter]: Timeout [2018-11-06 22:53:03,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:53:03 BoogieIcfgContainer [2018-11-06 22:53:03,802 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-06 22:53:03,803 INFO L168 Benchmark]: Toolchain (without parser) took 239370.16 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 716.2 MB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -442.0 MB). Peak memory consumption was 274.2 MB. Max. memory is 7.1 GB. [2018-11-06 22:53:03,803 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 22:53:03,804 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.62 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-11-06 22:53:03,804 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.60 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 22:53:03,805 INFO L168 Benchmark]: Boogie Preprocessor took 19.12 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 22:53:03,805 INFO L168 Benchmark]: RCFGBuilder took 472.03 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 746.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -800.1 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. [2018-11-06 22:53:03,806 INFO L168 Benchmark]: TraceAbstraction took 238574.33 ms. Allocated memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: -30.4 MB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 347.6 MB). Peak memory consumption was 317.2 MB. Max. memory is 7.1 GB. [2018-11-06 22:53:03,809 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.62 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 35.60 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.12 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 472.03 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 746.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -800.1 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 238574.33 ms. Allocated memory was 2.3 GB in the beginning and 2.3 GB in the end (delta: -30.4 MB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 347.6 MB). Peak memory consumption was 317.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 169 with TraceHistMax 28,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. TIMEOUT Result, 238.5s OverallTime, 55 OverallIterations, 28 TraceHistogramMax, 111.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1442 SDtfs, 12115 SDslu, 43206 SDs, 0 SdLazy, 77187 SolverSat, 10242 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 52.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7708 GetRequests, 3505 SyntacticMatches, 2 SemanticMatches, 4201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111050 ImplicationChecksByTransitivity, 156.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=169occurred in iteration=54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 54 MinimizatonAttempts, 182 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 114.9s InterpolantComputationTime, 9171 NumberOfCodeBlocks, 9171 NumberOfCodeBlocksAsserted, 472 NumberOfCheckSat, 9065 ConstructedInterpolants, 0 QuantifiedInterpolants, 11208618 SizeOfPredicates, 300 NumberOfNonLiveVariables, 12714 ConjunctsInSsa, 2986 ConjunctsInUnsatCore, 106 InterpolantComputations, 2 PerfectInterpolantSequences, 16652/73216 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown