java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono6_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:07:08,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:07:08,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:07:08,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 20:07:08,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 20:07:08,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 20:07:08,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 20:07:08,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 20:07:08,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 20:07:08,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 20:07:08,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 20:07:08,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 20:07:08,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:07:08,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:07:08,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:07:08,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:07:08,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:07:08,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:07:08,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:07:08,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:07:08,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:07:08,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:07:08,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:07:08,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:07:08,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 20:07:08,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:07:08,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:07:08,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:07:08,769 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-03 20:07:08,782 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:07:08,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:07:08,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 20:07:08,784 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 20:07:08,784 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 20:07:08,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:07:08,784 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:07:08,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 20:07:08,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:07:08,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:07:08,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:07:08,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:07:08,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:07:08,786 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:07:08,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:07:08,786 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 20:07:08,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:07:08,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:07:08,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:07:08,787 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 20:07:08,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 20:07:08,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:07:08,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:07:08,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:07:08,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 20:07:08,788 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 20:07:08,788 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:07:08,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:07:08,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 20:07:08,822 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:07:08,834 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:07:08,837 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:07:08,840 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:07:08,841 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:07:08,841 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono6_1.c [2019-09-03 20:07:08,910 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b35b42c98/7f56671415fa4c0496bdbe63204dc6a1/FLAG558f7a070 [2019-09-03 20:07:09,356 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:07:09,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono6_1.c [2019-09-03 20:07:09,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b35b42c98/7f56671415fa4c0496bdbe63204dc6a1/FLAG558f7a070 [2019-09-03 20:07:09,777 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b35b42c98/7f56671415fa4c0496bdbe63204dc6a1 [2019-09-03 20:07:09,786 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:07:09,788 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:07:09,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:07:09,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:07:09,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:07:09,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:07:09" (1/1) ... [2019-09-03 20:07:09,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f89b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:07:09, skipping insertion in model container [2019-09-03 20:07:09,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:07:09" (1/1) ... [2019-09-03 20:07:09,804 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:07:09,820 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:07:10,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:07:10,019 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:07:10,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:07:10,053 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:07:10,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:07:10 WrapperNode [2019-09-03 20:07:10,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:07:10,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:07:10,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:07:10,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:07:10,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:07:10" (1/1) ... [2019-09-03 20:07:10,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:07:10" (1/1) ... [2019-09-03 20:07:10,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:07:10" (1/1) ... [2019-09-03 20:07:10,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:07:10" (1/1) ... [2019-09-03 20:07:10,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:07:10" (1/1) ... [2019-09-03 20:07:10,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:07:10" (1/1) ... [2019-09-03 20:07:10,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:07:10" (1/1) ... [2019-09-03 20:07:10,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:07:10,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:07:10,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:07:10,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:07:10,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:07:10" (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 [2019-09-03 20:07:10,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:07:10,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:07:10,253 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:07:10,253 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:07:10,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:07:10,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:07:10,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:07:10,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:07:10,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:07:10,426 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:07:10,426 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 20:07:10,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:07:10 BoogieIcfgContainer [2019-09-03 20:07:10,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:07:10,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:07:10,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:07:10,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:07:10,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:07:09" (1/3) ... [2019-09-03 20:07:10,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156c3cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:07:10, skipping insertion in model container [2019-09-03 20:07:10,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:07:10" (2/3) ... [2019-09-03 20:07:10,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156c3cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:07:10, skipping insertion in model container [2019-09-03 20:07:10,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:07:10" (3/3) ... [2019-09-03 20:07:10,439 INFO L109 eAbstractionObserver]: Analyzing ICFG Mono6_1.c [2019-09-03 20:07:10,451 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:07:10,461 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:07:10,516 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:07:10,572 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 20:07:10,572 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:07:10,573 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 20:07:10,573 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:07:10,573 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:07:10,573 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:07:10,573 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:07:10,573 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:07:10,574 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:07:10,588 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-03 20:07:10,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:07:10,592 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:10,593 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:10,595 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:10,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:10,599 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2019-09-03 20:07:10,600 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:10,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:10,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:10,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:07:10,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:07:10,691 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:07:10,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 20:07:10,695 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:07:10,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:07:10,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:07:10,711 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-09-03 20:07:10,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:10,733 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-09-03 20:07:10,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:07:10,734 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 20:07:10,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:10,741 INFO L225 Difference]: With dead ends: 32 [2019-09-03 20:07:10,741 INFO L226 Difference]: Without dead ends: 13 [2019-09-03 20:07:10,744 INFO L628 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 [2019-09-03 20:07:10,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-03 20:07:10,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-03 20:07:10,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-03 20:07:10,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-09-03 20:07:10,776 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-09-03 20:07:10,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:10,776 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-09-03 20:07:10,776 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:07:10,777 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-09-03 20:07:10,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:07:10,777 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:10,777 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:10,778 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:10,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:10,778 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2019-09-03 20:07:10,778 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:10,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:10,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:10,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:07:10,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:07:10,903 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:07:10,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 20:07:10,905 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 20:07:10,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 20:07:10,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:07:10,906 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-09-03 20:07:10,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:10,950 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-09-03 20:07:10,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 20:07:10,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-03 20:07:10,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:10,952 INFO L225 Difference]: With dead ends: 21 [2019-09-03 20:07:10,953 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 20:07:10,954 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:07:10,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 20:07:10,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2019-09-03 20:07:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-03 20:07:10,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-09-03 20:07:10,962 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-09-03 20:07:10,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:10,963 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-09-03 20:07:10,964 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 20:07:10,964 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-09-03 20:07:10,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-03 20:07:10,965 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:10,965 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:10,965 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:10,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:10,966 INFO L82 PathProgramCache]: Analyzing trace with hash 743821333, now seen corresponding path program 1 times [2019-09-03 20:07:10,966 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:10,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:10,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:10,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:07:10,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:07:11,074 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:07:11,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 20:07:11,075 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 20:07:11,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 20:07:11,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:07:11,076 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2019-09-03 20:07:11,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:11,096 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-09-03 20:07:11,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 20:07:11,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-09-03 20:07:11,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:11,098 INFO L225 Difference]: With dead ends: 24 [2019-09-03 20:07:11,098 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 20:07:11,099 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:07:11,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 20:07:11,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-09-03 20:07:11,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-03 20:07:11,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-09-03 20:07:11,103 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2019-09-03 20:07:11,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:11,104 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-09-03 20:07:11,104 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 20:07:11,104 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-09-03 20:07:11,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-03 20:07:11,105 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:11,105 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:11,105 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:11,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:11,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1776138601, now seen corresponding path program 1 times [2019-09-03 20:07:11,106 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:11,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:11,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:11,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:07:11,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:07:11,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:07:11,253 INFO L223 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) [2019-09-03 20:07:11,269 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:07:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:11,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-03 20:07:11,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:07:11,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:07:11,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-09-03 20:07:11,349 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 20:07:11,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 20:07:11,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:07:11,350 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2019-09-03 20:07:11,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:11,410 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-09-03 20:07:11,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-03 20:07:11,411 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-09-03 20:07:11,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:11,412 INFO L225 Difference]: With dead ends: 27 [2019-09-03 20:07:11,412 INFO L226 Difference]: Without dead ends: 19 [2019-09-03 20:07:11,413 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:07:11,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-03 20:07:11,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-09-03 20:07:11,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-03 20:07:11,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-03 20:07:11,422 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-09-03 20:07:11,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:11,423 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-03 20:07:11,423 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 20:07:11,423 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-03 20:07:11,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 20:07:11,425 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:11,425 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:11,425 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:11,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:11,426 INFO L82 PathProgramCache]: Analyzing trace with hash 199799702, now seen corresponding path program 2 times [2019-09-03 20:07:11,426 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:11,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:11,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:11,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:07:11,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:07:11,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:07:11,642 INFO L223 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 [2019-09-03 20:07:11,661 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:07:11,672 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-09-03 20:07:11,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:07:11,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-03 20:07:11,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:11,729 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:07:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-03 20:07:11,774 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:07:11,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2019-09-03 20:07:11,775 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:07:11,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:07:11,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:07:11,776 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2019-09-03 20:07:11,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:11,985 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2019-09-03 20:07:11,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 20:07:11,986 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-09-03 20:07:11,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:11,987 INFO L225 Difference]: With dead ends: 36 [2019-09-03 20:07:11,987 INFO L226 Difference]: Without dead ends: 25 [2019-09-03 20:07:11,989 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:07:11,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-03 20:07:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-09-03 20:07:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-03 20:07:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-09-03 20:07:11,998 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2019-09-03 20:07:11,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:11,999 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-09-03 20:07:11,999 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:07:11,999 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-09-03 20:07:12,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-03 20:07:12,001 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:12,001 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:12,002 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:12,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:12,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1682133644, now seen corresponding path program 1 times [2019-09-03 20:07:12,003 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:12,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:12,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:12,005 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:07:12,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:07:12,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:07:12,142 INFO L223 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 [2019-09-03 20:07:12,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:07:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:12,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-03 20:07:12,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:07:12,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:07:12,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-03 20:07:12,212 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 20:07:12,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 20:07:12,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:07:12,212 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2019-09-03 20:07:12,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:12,292 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2019-09-03 20:07:12,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:07:12,293 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-09-03 20:07:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:12,294 INFO L225 Difference]: With dead ends: 36 [2019-09-03 20:07:12,294 INFO L226 Difference]: Without dead ends: 28 [2019-09-03 20:07:12,294 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:07:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-03 20:07:12,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-09-03 20:07:12,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-03 20:07:12,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-09-03 20:07:12,300 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2019-09-03 20:07:12,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:12,300 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-09-03 20:07:12,300 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 20:07:12,301 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-09-03 20:07:12,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-03 20:07:12,301 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:12,302 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:12,302 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:12,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:12,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1785237675, now seen corresponding path program 2 times [2019-09-03 20:07:12,302 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:12,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:12,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:12,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:07:12,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:07:12,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:07:12,411 INFO L223 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) [2019-09-03 20:07:12,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:07:12,451 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:07:12,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:07:12,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-03 20:07:12,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:07:12,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:07:12,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-03 20:07:12,488 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:07:12,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:07:12,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:07:12,490 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2019-09-03 20:07:12,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:12,579 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2019-09-03 20:07:12,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:07:12,580 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-09-03 20:07:12,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:12,581 INFO L225 Difference]: With dead ends: 39 [2019-09-03 20:07:12,581 INFO L226 Difference]: Without dead ends: 31 [2019-09-03 20:07:12,583 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:07:12,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-03 20:07:12,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-09-03 20:07:12,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-03 20:07:12,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-09-03 20:07:12,591 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2019-09-03 20:07:12,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:12,591 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-09-03 20:07:12,591 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:07:12,591 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-09-03 20:07:12,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-03 20:07:12,592 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:12,593 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:12,593 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:12,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:12,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1839158740, now seen corresponding path program 3 times [2019-09-03 20:07:12,594 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:12,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:12,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:12,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:07:12,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:07:12,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:07:12,743 INFO L223 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) [2019-09-03 20:07:12,755 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:07:12,771 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-03 20:07:12,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:07:12,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-03 20:07:12,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:12,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:07:12,870 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-03 20:07:12,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:07:12,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-09-03 20:07:12,874 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 20:07:12,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 20:07:12,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:07:12,875 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2019-09-03 20:07:13,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:13,188 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2019-09-03 20:07:13,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 20:07:13,188 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2019-09-03 20:07:13,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:13,189 INFO L225 Difference]: With dead ends: 48 [2019-09-03 20:07:13,189 INFO L226 Difference]: Without dead ends: 37 [2019-09-03 20:07:13,190 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:07:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-03 20:07:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-09-03 20:07:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-03 20:07:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2019-09-03 20:07:13,196 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2019-09-03 20:07:13,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:13,196 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2019-09-03 20:07:13,196 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 20:07:13,196 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2019-09-03 20:07:13,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-03 20:07:13,197 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:13,197 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:13,197 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:13,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:13,198 INFO L82 PathProgramCache]: Analyzing trace with hash -760785930, now seen corresponding path program 4 times [2019-09-03 20:07:13,198 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:13,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:13,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:13,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:07:13,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 33 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:07:13,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:07:13,314 INFO L223 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) [2019-09-03 20:07:13,339 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:07:13,354 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:07:13,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:07:13,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 20:07:13,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 33 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:07:13,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:07:13,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-03 20:07:13,393 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:07:13,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:07:13,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:07:13,395 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 10 states. [2019-09-03 20:07:13,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:13,516 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2019-09-03 20:07:13,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 20:07:13,517 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-09-03 20:07:13,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:13,518 INFO L225 Difference]: With dead ends: 51 [2019-09-03 20:07:13,518 INFO L226 Difference]: Without dead ends: 40 [2019-09-03 20:07:13,519 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:07:13,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-03 20:07:13,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-09-03 20:07:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-03 20:07:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2019-09-03 20:07:13,528 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 34 [2019-09-03 20:07:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:13,530 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2019-09-03 20:07:13,530 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:07:13,530 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2019-09-03 20:07:13,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-03 20:07:13,531 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:13,531 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:13,531 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:13,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:13,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1049709655, now seen corresponding path program 5 times [2019-09-03 20:07:13,532 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:13,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:13,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:13,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:07:13,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 38 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:07:13,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:07:13,683 INFO L223 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 [2019-09-03 20:07:13,709 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:07:13,793 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-03 20:07:13,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:07:13,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-03 20:07:13,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 38 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:07:13,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:07:13,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-03 20:07:13,829 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:07:13,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:07:13,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:07:13,829 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 11 states. [2019-09-03 20:07:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:13,991 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2019-09-03 20:07:13,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:07:13,992 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-09-03 20:07:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:13,993 INFO L225 Difference]: With dead ends: 54 [2019-09-03 20:07:13,993 INFO L226 Difference]: Without dead ends: 43 [2019-09-03 20:07:13,993 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:07:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-03 20:07:13,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-09-03 20:07:13,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-03 20:07:13,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-09-03 20:07:13,999 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 37 [2019-09-03 20:07:13,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:13,999 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-09-03 20:07:13,999 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:07:13,999 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-09-03 20:07:14,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-03 20:07:14,000 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:14,000 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:14,001 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:14,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:14,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1324379222, now seen corresponding path program 6 times [2019-09-03 20:07:14,001 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:14,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:14,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:14,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:07:14,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 43 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:07:14,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:07:14,178 INFO L223 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 [2019-09-03 20:07:14,194 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:07:14,232 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-03 20:07:14,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:07:14,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 20:07:14,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:14,319 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:07:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-03 20:07:14,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:07:14,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2019-09-03 20:07:14,354 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-03 20:07:14,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-03 20:07:14,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:07:14,355 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 17 states. [2019-09-03 20:07:14,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:14,878 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2019-09-03 20:07:14,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 20:07:14,878 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2019-09-03 20:07:14,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:14,879 INFO L225 Difference]: With dead ends: 63 [2019-09-03 20:07:14,879 INFO L226 Difference]: Without dead ends: 49 [2019-09-03 20:07:14,880 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:07:14,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-03 20:07:14,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-09-03 20:07:14,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-03 20:07:14,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2019-09-03 20:07:14,886 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 40 [2019-09-03 20:07:14,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:14,886 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2019-09-03 20:07:14,887 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-03 20:07:14,887 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2019-09-03 20:07:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-03 20:07:14,887 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:14,888 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:14,888 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:14,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:14,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1062711220, now seen corresponding path program 7 times [2019-09-03 20:07:14,888 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:14,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:14,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:14,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:07:14,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 53 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:07:15,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:07:15,062 INFO L223 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 [2019-09-03 20:07:15,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:07:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:15,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-03 20:07:15,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 77 proven. 126 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-03 20:07:15,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:07:15,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2019-09-03 20:07:15,125 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 20:07:15,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 20:07:15,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:07:15,125 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 13 states. [2019-09-03 20:07:15,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:15,375 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2019-09-03 20:07:15,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 20:07:15,376 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2019-09-03 20:07:15,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:15,377 INFO L225 Difference]: With dead ends: 69 [2019-09-03 20:07:15,378 INFO L226 Difference]: Without dead ends: 55 [2019-09-03 20:07:15,378 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:07:15,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-03 20:07:15,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-09-03 20:07:15,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-03 20:07:15,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-09-03 20:07:15,385 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 46 [2019-09-03 20:07:15,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:15,385 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-09-03 20:07:15,385 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 20:07:15,385 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-09-03 20:07:15,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-03 20:07:15,386 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:15,386 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:15,387 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:15,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:15,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1340028948, now seen corresponding path program 8 times [2019-09-03 20:07:15,387 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:15,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:15,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:15,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:07:15,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 63 proven. 222 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:07:15,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:07:15,596 INFO L223 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 [2019-09-03 20:07:15,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:07:15,622 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:07:15,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:07:15,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-03 20:07:15,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 93 proven. 187 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Stream closed [2019-09-03 20:07:15,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:07:15,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2019-09-03 20:07:15,653 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 20:07:15,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 20:07:15,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:07:15,654 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 15 states. [2019-09-03 20:07:16,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:16,044 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2019-09-03 20:07:16,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 20:07:16,044 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2019-09-03 20:07:16,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:16,045 INFO L225 Difference]: With dead ends: 75 [2019-09-03 20:07:16,045 INFO L226 Difference]: Without dead ends: 61 [2019-09-03 20:07:16,046 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:07:16,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-03 20:07:16,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-09-03 20:07:16,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-03 20:07:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2019-09-03 20:07:16,052 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 52 [2019-09-03 20:07:16,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:16,053 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2019-09-03 20:07:16,053 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 20:07:16,053 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2019-09-03 20:07:16,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-03 20:07:16,054 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:16,054 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:16,054 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:16,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:16,054 INFO L82 PathProgramCache]: Analyzing trace with hash -990447500, now seen corresponding path program 9 times [2019-09-03 20:07:16,055 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:16,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:16,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:16,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:07:16,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 73 proven. 301 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:07:16,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:07:16,306 INFO L223 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 [2019-09-03 20:07:16,319 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:07:16,355 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-03 20:07:16,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:07:16,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-03 20:07:16,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:16,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:07:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-09-03 20:07:16,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:07:16,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2019-09-03 20:07:16,581 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-03 20:07:16,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-03 20:07:16,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2019-09-03 20:07:16,582 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 24 states. [2019-09-03 20:07:17,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:17,715 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2019-09-03 20:07:17,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-03 20:07:17,715 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2019-09-03 20:07:17,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:17,716 INFO L225 Difference]: With dead ends: 87 [2019-09-03 20:07:17,716 INFO L226 Difference]: Without dead ends: 70 [2019-09-03 20:07:17,717 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2019-09-03 20:07:17,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-03 20:07:17,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2019-09-03 20:07:17,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-03 20:07:17,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2019-09-03 20:07:17,724 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 58 [2019-09-03 20:07:17,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:17,724 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2019-09-03 20:07:17,724 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-03 20:07:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2019-09-03 20:07:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-03 20:07:17,726 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:17,726 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 15, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:17,726 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:17,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:17,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1758268855, now seen corresponding path program 10 times [2019-09-03 20:07:17,726 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:17,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:17,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:17,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:07:17,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 88 proven. 442 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:07:18,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:07:18,059 INFO L223 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 [2019-09-03 20:07:18,077 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:07:18,099 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:07:18,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:07:18,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-03 20:07:18,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 172 proven. 345 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-03 20:07:18,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:07:18,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2019-09-03 20:07:18,148 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 20:07:18,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 20:07:18,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:07:18,149 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 20 states. [2019-09-03 20:07:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:07:18,795 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2019-09-03 20:07:18,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 20:07:18,796 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2019-09-03 20:07:18,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:07:18,797 INFO L225 Difference]: With dead ends: 96 [2019-09-03 20:07:18,797 INFO L226 Difference]: Without dead ends: 79 [2019-09-03 20:07:18,798 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:07:18,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-03 20:07:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2019-09-03 20:07:18,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-03 20:07:18,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2019-09-03 20:07:18,804 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 67 [2019-09-03 20:07:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:07:18,805 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2019-09-03 20:07:18,805 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-03 20:07:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2019-09-03 20:07:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-03 20:07:18,806 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:07:18,806 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 18, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:07:18,806 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:07:18,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:07:18,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1281897002, now seen corresponding path program 11 times [2019-09-03 20:07:18,807 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:07:18,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:07:18,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:18,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:07:18,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:07:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:07:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 103 proven. 610 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:07:19,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:07:19,203 INFO L223 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 [2019-09-03 20:07:19,217 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:11:19,242 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-09-03 20:11:19,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:11:22,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-03 20:11:22,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:11:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 205 proven. 495 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-03 20:11:22,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:11:22,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 23 [2019-09-03 20:11:22,071 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 20:11:22,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 20:11:22,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:11:22,072 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 23 states. [2019-09-03 20:11:22,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:11:22,733 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2019-09-03 20:11:22,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-03 20:11:22,734 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 76 [2019-09-03 20:11:22,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:11:22,735 INFO L225 Difference]: With dead ends: 105 [2019-09-03 20:11:22,735 INFO L226 Difference]: Without dead ends: 88 [2019-09-03 20:11:22,736 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:11:22,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-03 20:11:22,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2019-09-03 20:11:22,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-03 20:11:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2019-09-03 20:11:22,752 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 76 [2019-09-03 20:11:22,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:11:22,756 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2019-09-03 20:11:22,756 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 20:11:22,756 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2019-09-03 20:11:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-03 20:11:22,757 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:11:22,757 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 21, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:11:22,757 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:11:22,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:11:22,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1781940073, now seen corresponding path program 12 times [2019-09-03 20:11:22,758 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:11:22,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:11:22,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:11:22,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:11:22,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:11:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:11:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 118 proven. 805 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:11:23,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:11:23,250 INFO L223 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 [2019-09-03 20:11:23,263 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:12:34,853 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-03 20:12:34,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:36,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-03 20:12:36,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:36,765 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:12:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (15)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:12:36,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:12:36,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 12] total 36 [2019-09-03 20:12:36,842 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-03 20:12:36,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-03 20:12:36,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2019-09-03 20:12:36,843 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand 36 states. [2019-09-03 20:12:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:39,413 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2019-09-03 20:12:39,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-03 20:12:39,414 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 85 [2019-09-03 20:12:39,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:39,415 INFO L225 Difference]: With dead ends: 121 [2019-09-03 20:12:39,416 INFO L226 Difference]: Without dead ends: 101 [2019-09-03 20:12:39,419 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=247, Invalid=3659, Unknown=0, NotChecked=0, Total=3906 [2019-09-03 20:12:39,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-09-03 20:12:39,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2019-09-03 20:12:39,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-09-03 20:12:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2019-09-03 20:12:39,426 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 85 [2019-09-03 20:12:39,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:39,426 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2019-09-03 20:12:39,426 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-03 20:12:39,426 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2019-09-03 20:12:39,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-03 20:12:39,427 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:39,427 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 24, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:39,428 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:39,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:39,428 INFO L82 PathProgramCache]: Analyzing trace with hash 841571413, now seen corresponding path program 13 times [2019-09-03 20:12:39,428 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:39,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:39,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:39,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:39,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 138 proven. 1107 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:12:40,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:12:40,138 INFO L223 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 [2019-09-03 20:12:40,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:12:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:40,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-03 20:12:40,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 345 proven. 876 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-03 20:12:40,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:12:40,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 30 [2019-09-03 20:12:40,203 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-03 20:12:40,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-03 20:12:40,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2019-09-03 20:12:40,204 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand 30 states. [2019-09-03 20:12:41,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:41,679 INFO L93 Difference]: Finished difference Result 132 states and 145 transitions. [2019-09-03 20:12:41,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-03 20:12:41,680 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 97 [2019-09-03 20:12:41,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:41,681 INFO L225 Difference]: With dead ends: 132 [2019-09-03 20:12:41,681 INFO L226 Difference]: Without dead ends: 112 [2019-09-03 20:12:41,682 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2019-09-03 20:12:41,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-09-03 20:12:41,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2019-09-03 20:12:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-09-03 20:12:41,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 116 transitions. [2019-09-03 20:12:41,689 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 116 transitions. Word has length 97 [2019-09-03 20:12:41,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:41,690 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 116 transitions. [2019-09-03 20:12:41,690 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-03 20:12:41,690 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 116 transitions. [2019-09-03 20:12:41,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-03 20:12:41,691 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:41,691 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 28, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:41,691 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:41,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:41,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1140270187, now seen corresponding path program 14 times [2019-09-03 20:12:41,692 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:41,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:41,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:41,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:12:41,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 158 proven. 1457 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:12:42,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:12:42,437 INFO L223 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 [2019-09-03 20:12:42,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:12:42,477 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:12:42,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:42,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 59 conjunts are in the unsatisfiable core [2019-09-03 20:12:42,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 401 proven. 1190 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-03 20:12:42,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:12:42,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31] total 34 [2019-09-03 20:12:42,525 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-03 20:12:42,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-03 20:12:42,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2019-09-03 20:12:42,526 INFO L87 Difference]: Start difference. First operand 111 states and 116 transitions. Second operand 34 states. [2019-09-03 20:12:44,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:44,440 INFO L93 Difference]: Finished difference Result 144 states and 157 transitions. [2019-09-03 20:12:44,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-03 20:12:44,440 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 109 [2019-09-03 20:12:44,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:44,442 INFO L225 Difference]: With dead ends: 144 [2019-09-03 20:12:44,442 INFO L226 Difference]: Without dead ends: 124 [2019-09-03 20:12:44,443 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2019-09-03 20:12:44,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-09-03 20:12:44,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2019-09-03 20:12:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-09-03 20:12:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 128 transitions. [2019-09-03 20:12:44,449 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 128 transitions. Word has length 109 [2019-09-03 20:12:44,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:44,450 INFO L475 AbstractCegarLoop]: Abstraction has 123 states and 128 transitions. [2019-09-03 20:12:44,450 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-03 20:12:44,450 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 128 transitions. [2019-09-03 20:12:44,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-03 20:12:44,451 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:44,451 INFO L399 BasicCegarLoop]: trace histogram [37, 37, 32, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:44,451 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:44,452 INFO L82 PathProgramCache]: Analyzing trace with hash 274954965, now seen corresponding path program 15 times [2019-09-03 20:12:44,452 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:44,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:44,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:44,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:44,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 178 proven. 1855 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:12:45,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:12:45,288 INFO L223 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 [2019-09-03 20:12:45,298 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:12:45,811 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-09-03 20:12:45,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:45,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-03 20:12:45,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:46,378 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:12:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2019-09-03 20:12:46,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:12:46,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 14] total 50 [2019-09-03 20:12:46,497 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-03 20:12:46,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-03 20:12:46,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2317, Unknown=0, NotChecked=0, Total=2450 [2019-09-03 20:12:46,498 INFO L87 Difference]: Start difference. First operand 123 states and 128 transitions. Second operand 50 states. [2019-09-03 20:12:51,362 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2019-09-03 20:12:51,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:51,430 INFO L93 Difference]: Finished difference Result 163 states and 178 transitions. [2019-09-03 20:12:51,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-09-03 20:12:51,430 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 121 [2019-09-03 20:12:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:51,431 INFO L225 Difference]: With dead ends: 163 [2019-09-03 20:12:51,431 INFO L226 Difference]: Without dead ends: 140 [2019-09-03 20:12:51,435 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=363, Invalid=7647, Unknown=0, NotChecked=0, Total=8010 [2019-09-03 20:12:51,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-09-03 20:12:51,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2019-09-03 20:12:51,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-09-03 20:12:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2019-09-03 20:12:51,441 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 121 [2019-09-03 20:12:51,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:51,442 INFO L475 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2019-09-03 20:12:51,442 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-03 20:12:51,442 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2019-09-03 20:12:51,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-03 20:12:51,443 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:51,443 INFO L399 BasicCegarLoop]: trace histogram [42, 42, 36, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:51,443 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:51,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:51,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1247432490, now seen corresponding path program 16 times [2019-09-03 20:12:51,444 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:51,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:51,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:51,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:51,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 203 proven. 2420 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:12:52,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:12:52,493 INFO L223 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 [2019-09-03 20:12:52,505 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:12:52,547 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:12:52,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:52,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 85 conjunts are in the unsatisfiable core [2019-09-03 20:12:52,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 83 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:12:52,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:12:52,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44] total 45 [2019-09-03 20:12:52,718 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-03 20:12:52,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-03 20:12:52,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2019-09-03 20:12:52,719 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 45 states. [2019-09-03 20:12:56,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:56,029 INFO L93 Difference]: Finished difference Result 180 states and 195 transitions. [2019-09-03 20:12:56,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-03 20:12:56,030 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 136 [2019-09-03 20:12:56,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:56,032 INFO L225 Difference]: With dead ends: 180 [2019-09-03 20:12:56,032 INFO L226 Difference]: Without dead ends: 157 [2019-09-03 20:12:56,033 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2019-09-03 20:12:56,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-09-03 20:12:56,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2019-09-03 20:12:56,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-09-03 20:12:56,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2019-09-03 20:12:56,040 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 136 [2019-09-03 20:12:56,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:56,040 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2019-09-03 20:12:56,040 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-03 20:12:56,040 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2019-09-03 20:12:56,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-09-03 20:12:56,042 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:56,042 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 42, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:56,042 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:56,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:56,042 INFO L82 PathProgramCache]: Analyzing trace with hash -307443210, now seen corresponding path program 17 times [2019-09-03 20:12:56,043 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:56,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:56,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:56,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:56,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 233 proven. 3197 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:12:57,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:12:57,524 INFO L223 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) [2019-09-03 20:12:57,543 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000