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/ldv-regression/test27-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:01:08,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:01:08,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:01:08,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 13:01:08,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:01:08,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:01:08,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:01:08,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:01:08,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:01:08,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:01:08,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:01:08,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:01:08,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:01:08,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:01:08,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:01:08,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:01:08,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 13:01:08,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:01:08,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:01:08,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:01:08,713 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 [2019-09-20 13:01:08,728 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:01:08,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:01:08,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 13:01:08,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 13:01:08,730 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 13:01:08,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:01:08,731 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:01:08,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 13:01:08,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:01:08,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:01:08,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:01:08,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:01:08,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:01:08,732 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:01:08,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:01:08,733 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 13:01:08,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:01:08,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:01:08,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:01:08,733 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 13:01:08,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 13:01:08,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:01:08,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:01:08,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:01:08,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 13:01:08,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 13:01:08,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:01:08,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 13:01:08,735 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:01:08,764 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:01:08,777 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:01:08,780 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:01:08,782 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:01:08,783 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:01:08,783 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test27-1.c [2019-09-20 13:01:08,843 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06068662f/24c7f0ea5f5b4b8ab79099b79978ce73/FLAG685f75e04 [2019-09-20 13:01:09,268 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:01:09,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test27-1.c [2019-09-20 13:01:09,279 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06068662f/24c7f0ea5f5b4b8ab79099b79978ce73/FLAG685f75e04 [2019-09-20 13:01:09,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06068662f/24c7f0ea5f5b4b8ab79099b79978ce73 [2019-09-20 13:01:09,649 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:01:09,651 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:01:09,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:01:09,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:01:09,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:01:09,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:01:09" (1/1) ... [2019-09-20 13:01:09,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b862e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:09, skipping insertion in model container [2019-09-20 13:01:09,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:01:09" (1/1) ... [2019-09-20 13:01:09,666 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:01:09,686 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:01:09,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:01:09,928 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:01:10,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:01:10,090 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:01:10,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10 WrapperNode [2019-09-20 13:01:10,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:01:10,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:01:10,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:01:10,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:01:10,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10" (1/1) ... [2019-09-20 13:01:10,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10" (1/1) ... [2019-09-20 13:01:10,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10" (1/1) ... [2019-09-20 13:01:10,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10" (1/1) ... [2019-09-20 13:01:10,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10" (1/1) ... [2019-09-20 13:01:10,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10" (1/1) ... [2019-09-20 13:01:10,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10" (1/1) ... [2019-09-20 13:01:10,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:01:10,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:01:10,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:01:10,163 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:01:10,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10" (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 [2019-09-20 13:01:10,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:01:10,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:01:10,227 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2019-09-20 13:01:10,228 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:01:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:01:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:01:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-09-20 13:01:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-09-20 13:01:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-20 13:01:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:01:10,228 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:01:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:01:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:01:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-20 13:01:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:01:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:01:10,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:01:10,614 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:01:10,614 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-20 13:01:10,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:01:10 BoogieIcfgContainer [2019-09-20 13:01:10,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:01:10,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:01:10,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:01:10,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:01:10,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:01:09" (1/3) ... [2019-09-20 13:01:10,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3aff16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:01:10, skipping insertion in model container [2019-09-20 13:01:10,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10" (2/3) ... [2019-09-20 13:01:10,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3aff16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:01:10, skipping insertion in model container [2019-09-20 13:01:10,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:01:10" (3/3) ... [2019-09-20 13:01:10,624 INFO L109 eAbstractionObserver]: Analyzing ICFG test27-1.c [2019-09-20 13:01:10,635 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:01:10,643 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:01:10,661 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:01:10,702 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 13:01:10,704 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:01:10,704 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 13:01:10,705 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:01:10,705 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:01:10,705 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:01:10,705 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:01:10,705 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:01:10,705 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:01:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-09-20 13:01:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-20 13:01:10,730 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:01:10,731 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:01:10,733 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:01:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:01:10,737 INFO L82 PathProgramCache]: Analyzing trace with hash 63236786, now seen corresponding path program 1 times [2019-09-20 13:01:10,739 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:01:10,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:01:10,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:10,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:01:10,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:01:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:01:10,939 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:01:10,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:01:10,943 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:01:10,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:01:10,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:01:10,958 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-09-20 13:01:10,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:01:10,978 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2019-09-20 13:01:10,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:01:10,979 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-09-20 13:01:10,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:01:10,989 INFO L225 Difference]: With dead ends: 42 [2019-09-20 13:01:10,990 INFO L226 Difference]: Without dead ends: 20 [2019-09-20 13:01:10,993 INFO L636 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 [2019-09-20 13:01:11,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-20 13:01:11,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-20 13:01:11,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-20 13:01:11,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-09-20 13:01:11,030 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2019-09-20 13:01:11,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:01:11,031 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-09-20 13:01:11,031 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:01:11,032 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-09-20 13:01:11,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-20 13:01:11,033 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:01:11,033 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:01:11,034 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:01:11,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:01:11,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1428873564, now seen corresponding path program 1 times [2019-09-20 13:01:11,034 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:01:11,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:01:11,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:11,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:01:11,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:01:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:01:11,123 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:01:11,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:01:11,125 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:01:11,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:01:11,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:01:11,126 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 3 states. [2019-09-20 13:01:11,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:01:11,170 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-09-20 13:01:11,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:01:11,171 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-09-20 13:01:11,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:01:11,172 INFO L225 Difference]: With dead ends: 34 [2019-09-20 13:01:11,173 INFO L226 Difference]: Without dead ends: 22 [2019-09-20 13:01:11,174 INFO L636 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 [2019-09-20 13:01:11,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-20 13:01:11,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-09-20 13:01:11,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-20 13:01:11,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-20 13:01:11,180 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2019-09-20 13:01:11,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:01:11,181 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-20 13:01:11,181 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:01:11,181 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-20 13:01:11,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-20 13:01:11,182 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:01:11,182 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:01:11,183 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:01:11,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:01:11,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2015026266, now seen corresponding path program 1 times [2019-09-20 13:01:11,183 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:01:11,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:01:11,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:11,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:01:11,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:01:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:01:11,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:01:11,346 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:01:11,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:01:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:01:11,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-20 13:01:11,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:01:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:01:11,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:01:11,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-20 13:01:11,480 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:01:11,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:01:11,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:01:11,481 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2019-09-20 13:01:11,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:01:11,531 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-09-20 13:01:11,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 13:01:11,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-09-20 13:01:11,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:01:11,534 INFO L225 Difference]: With dead ends: 36 [2019-09-20 13:01:11,534 INFO L226 Difference]: Without dead ends: 24 [2019-09-20 13:01:11,535 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:01:11,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-20 13:01:11,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-09-20 13:01:11,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-20 13:01:11,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-09-20 13:01:11,540 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2019-09-20 13:01:11,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:01:11,541 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-09-20 13:01:11,541 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:01:11,541 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-09-20 13:01:11,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-20 13:01:11,542 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:01:11,542 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:01:11,543 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:01:11,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:01:11,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1627910184, now seen corresponding path program 2 times [2019-09-20 13:01:11,543 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:01:11,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:01:11,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:11,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:01:11,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:01:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:01:11,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:01:11,697 INFO L224 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 [2019-09-20 13:01:11,738 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 13:01:11,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-09-20 13:01:11,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:01:11,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-20 13:01:11,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:01:11,869 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:11,869 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2019-09-20 13:01:11,871 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:01:11,881 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:11,882 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-09-20 13:01:11,883 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2019-09-20 13:01:11,960 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 27 [2019-09-20 13:01:11,961 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:01:12,022 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:12,054 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 34 [2019-09-20 13:01:12,054 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-20 13:01:12,107 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:12,112 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 13:01:12,113 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:256, output treesize:130 [2019-09-20 13:01:12,205 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:12,206 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 216 treesize of output 137 [2019-09-20 13:01:12,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:12,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:12,220 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:12,226 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:12,229 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:12,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:12,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:12,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:12,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:12,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:12,254 INFO L496 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-09-20 13:01:12,297 INFO L567 ElimStorePlain]: treesize reduction 76, result has 45.7 percent of original size [2019-09-20 13:01:12,304 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 27 [2019-09-20 13:01:12,305 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-20 13:01:12,317 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:12,317 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 13:01:12,318 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:219, output treesize:13 [2019-09-20 13:01:12,345 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2019-09-20 13:01:12,346 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:01:12,354 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:12,354 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 13:01:12,355 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:9 [2019-09-20 13:01:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 13:01:12,391 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:01:12,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2019-09-20 13:01:12,392 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-20 13:01:12,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-20 13:01:12,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-09-20 13:01:12,393 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2019-09-20 13:01:12,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:01:12,664 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2019-09-20 13:01:12,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-20 13:01:12,665 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-09-20 13:01:12,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:01:12,666 INFO L225 Difference]: With dead ends: 40 [2019-09-20 13:01:12,667 INFO L226 Difference]: Without dead ends: 28 [2019-09-20 13:01:12,667 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2019-09-20 13:01:12,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-20 13:01:12,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-09-20 13:01:12,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-20 13:01:12,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-09-20 13:01:12,682 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2019-09-20 13:01:12,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:01:12,682 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-09-20 13:01:12,682 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-20 13:01:12,682 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-09-20 13:01:12,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-20 13:01:12,683 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:01:12,683 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:01:12,684 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:01:12,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:01:12,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1609672059, now seen corresponding path program 1 times [2019-09-20 13:01:12,685 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:01:12,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:01:12,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:12,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 13:01:12,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:01:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-20 13:01:12,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:01:12,809 INFO L224 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 [2019-09-20 13:01:12,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:01:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:01:12,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-20 13:01:12,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:01:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-20 13:01:12,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:01:12,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-20 13:01:12,899 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 13:01:12,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 13:01:12,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:01:12,901 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 7 states. [2019-09-20 13:01:12,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:01:12,948 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-09-20 13:01:12,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:01:12,949 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-09-20 13:01:12,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:01:12,950 INFO L225 Difference]: With dead ends: 44 [2019-09-20 13:01:12,950 INFO L226 Difference]: Without dead ends: 30 [2019-09-20 13:01:12,951 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:01:12,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-20 13:01:12,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-09-20 13:01:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-20 13:01:12,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-09-20 13:01:12,957 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2019-09-20 13:01:12,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:01:12,958 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-09-20 13:01:12,958 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 13:01:12,958 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-09-20 13:01:12,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-20 13:01:12,959 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:01:12,959 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:01:12,959 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:01:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:01:12,960 INFO L82 PathProgramCache]: Analyzing trace with hash -338543225, now seen corresponding path program 2 times [2019-09-20 13:01:12,960 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:01:12,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:01:12,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:12,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:01:12,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:01:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-20 13:01:13,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:01:13,124 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:01:13,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 13:01:13,242 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 13:01:13,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:01:13,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-20 13:01:13,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:01:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-20 13:01:13,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:01:13,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-20 13:01:13,276 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 13:01:13,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 13:01:13,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:01:13,276 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 8 states. [2019-09-20 13:01:13,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:01:13,330 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2019-09-20 13:01:13,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:01:13,332 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2019-09-20 13:01:13,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:01:13,333 INFO L225 Difference]: With dead ends: 46 [2019-09-20 13:01:13,333 INFO L226 Difference]: Without dead ends: 32 [2019-09-20 13:01:13,334 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:01:13,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-20 13:01:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-09-20 13:01:13,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-20 13:01:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2019-09-20 13:01:13,345 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2019-09-20 13:01:13,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:01:13,347 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2019-09-20 13:01:13,347 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 13:01:13,347 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2019-09-20 13:01:13,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-20 13:01:13,348 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:01:13,349 INFO L407 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:01:13,349 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:01:13,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:01:13,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1445554185, now seen corresponding path program 3 times [2019-09-20 13:01:13,350 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:01:13,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:01:13,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:13,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 13:01:13,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:01:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-20 13:01:13,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:01:13,511 INFO L224 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) [2019-09-20 13:01:13,538 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 [2019-09-20 13:01:13,591 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-20 13:01:13,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:01:13,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-20 13:01:13,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:01:13,622 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:13,623 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2019-09-20 13:01:13,624 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:01:13,634 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:13,635 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-09-20 13:01:13,635 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2019-09-20 13:01:13,685 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 27 [2019-09-20 13:01:13,686 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:01:13,743 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:13,766 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 34 [2019-09-20 13:01:13,767 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-20 13:01:13,823 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:13,824 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 13:01:13,824 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:256, output treesize:130 [2019-09-20 13:01:13,971 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:13,971 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 216 treesize of output 137 [2019-09-20 13:01:13,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:13,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:13,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:13,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:13,978 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:13,981 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:13,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:13,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:13,984 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:13,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:13,987 INFO L496 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-09-20 13:01:14,026 INFO L567 ElimStorePlain]: treesize reduction 76, result has 45.7 percent of original size [2019-09-20 13:01:14,031 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 27 [2019-09-20 13:01:14,032 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-20 13:01:14,042 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:14,043 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 13:01:14,043 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:219, output treesize:13 [2019-09-20 13:01:14,081 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2019-09-20 13:01:14,082 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:01:14,087 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:14,088 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 13:01:14,088 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:9 [2019-09-20 13:01:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-20 13:01:14,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:01:14,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-09-20 13:01:14,119 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-20 13:01:14,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-20 13:01:14,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-09-20 13:01:14,120 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 13 states. [2019-09-20 13:01:14,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:01:14,578 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2019-09-20 13:01:14,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-20 13:01:14,578 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2019-09-20 13:01:14,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:01:14,579 INFO L225 Difference]: With dead ends: 50 [2019-09-20 13:01:14,579 INFO L226 Difference]: Without dead ends: 36 [2019-09-20 13:01:14,580 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2019-09-20 13:01:14,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-20 13:01:14,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-09-20 13:01:14,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-20 13:01:14,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-09-20 13:01:14,586 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2019-09-20 13:01:14,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:01:14,587 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-09-20 13:01:14,587 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-20 13:01:14,587 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-09-20 13:01:14,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-20 13:01:14,588 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:01:14,588 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:01:14,588 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:01:14,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:01:14,589 INFO L82 PathProgramCache]: Analyzing trace with hash -695813082, now seen corresponding path program 4 times [2019-09-20 13:01:14,589 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:01:14,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:01:14,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:14,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 13:01:14,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:01:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-20 13:01:14,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:01:14,726 INFO L224 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) [2019-09-20 13:01:14,758 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 [2019-09-20 13:01:14,794 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-20 13:01:14,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:01:14,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-20 13:01:14,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:01:14,938 INFO L341 Elim1Store]: treesize reduction 28, result has 77.2 percent of original size [2019-09-20 13:01:14,938 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 102 [2019-09-20 13:01:14,939 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:01:15,093 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2019-09-20 13:01:15,094 INFO L567 ElimStorePlain]: treesize reduction 42, result has 84.6 percent of original size [2019-09-20 13:01:15,232 INFO L341 Elim1Store]: treesize reduction 28, result has 78.8 percent of original size [2019-09-20 13:01:15,233 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 113 [2019-09-20 13:01:15,234 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-20 13:01:15,391 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-09-20 13:01:15,392 INFO L567 ElimStorePlain]: treesize reduction 46, result has 81.7 percent of original size [2019-09-20 13:01:15,394 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-09-20 13:01:15,396 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,397 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,400 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-09-20 13:01:15,404 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,411 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,415 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,417 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,420 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,422 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,424 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-2 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2019-09-20 13:01:15,424 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:241, output treesize:1017 [2019-09-20 13:01:15,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,427 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,842 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 32 [2019-09-20 13:01:15,885 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:15,886 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 125 [2019-09-20 13:01:15,888 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,895 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,907 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,908 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,910 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,911 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:01:15,913 INFO L496 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-09-20 13:01:15,958 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:01:16,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:01:16,161 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:275) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:461) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-09-20 13:01:16,167 INFO L168 Benchmark]: Toolchain (without parser) took 6516.04 ms. Allocated memory was 134.2 MB in the beginning and 299.4 MB in the end (delta: 165.2 MB). Free memory was 90.0 MB in the beginning and 258.3 MB in the end (delta: -168.4 MB). Peak memory consumption was 132.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:01:16,168 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 134.2 MB. Free memory was 108.3 MB in the beginning and 108.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:01:16,169 INFO L168 Benchmark]: CACSL2BoogieTranslator took 440.11 ms. Allocated memory was 134.2 MB in the beginning and 199.8 MB in the end (delta: 65.5 MB). Free memory was 89.7 MB in the beginning and 175.6 MB in the end (delta: -85.9 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. [2019-09-20 13:01:16,170 INFO L168 Benchmark]: Boogie Preprocessor took 67.12 ms. Allocated memory is still 199.8 MB. Free memory was 175.6 MB in the beginning and 173.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-09-20 13:01:16,170 INFO L168 Benchmark]: RCFGBuilder took 453.55 ms. Allocated memory is still 199.8 MB. Free memory was 173.9 MB in the beginning and 153.8 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:01:16,171 INFO L168 Benchmark]: TraceAbstraction took 5547.86 ms. Allocated memory was 199.8 MB in the beginning and 299.4 MB in the end (delta: 99.6 MB). Free memory was 153.2 MB in the beginning and 258.3 MB in the end (delta: -105.1 MB). Peak memory consumption was 130.5 MB. Max. memory is 7.1 GB. [2019-09-20 13:01:16,179 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 134.2 MB. Free memory was 108.3 MB in the beginning and 108.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 440.11 ms. Allocated memory was 134.2 MB in the beginning and 199.8 MB in the end (delta: 65.5 MB). Free memory was 89.7 MB in the beginning and 175.6 MB in the end (delta: -85.9 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 67.12 ms. Allocated memory is still 199.8 MB. Free memory was 175.6 MB in the beginning and 173.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 453.55 ms. Allocated memory is still 199.8 MB. Free memory was 173.9 MB in the beginning and 153.8 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5547.86 ms. Allocated memory was 199.8 MB in the beginning and 299.4 MB in the end (delta: 99.6 MB). Free memory was 153.2 MB in the beginning and 258.3 MB in the end (delta: -105.1 MB). Peak memory consumption was 130.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: expected NNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: expected NNF: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...