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/reducercommutativity/sum05-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 11:18:51,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 11:18:51,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 11:18:51,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 11:18:51,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 11:18:51,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 11:18:51,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 11:18:51,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 11:18:51,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 11:18:51,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 11:18:51,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 11:18:51,874 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 11:18:51,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 11:18:51,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 11:18:51,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 11:18:51,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 11:18:51,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 11:18:51,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 11:18:51,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 11:18:51,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 11:18:51,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 11:18:51,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 11:18:51,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 11:18:51,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 11:18:51,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 11:18:51,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 11:18:51,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 11:18:51,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 11:18:51,915 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 [2019-09-07 11:18:51,940 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 11:18:51,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 11:18:51,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 11:18:51,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 11:18:51,943 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 11:18:51,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 11:18:51,943 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 11:18:51,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 11:18:51,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 11:18:51,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 11:18:51,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 11:18:51,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 11:18:51,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 11:18:51,946 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 11:18:51,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 11:18:51,946 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 11:18:51,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 11:18:51,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 11:18:51,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 11:18:51,947 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 11:18:51,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 11:18:51,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 11:18:51,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 11:18:51,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 11:18:51,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 11:18:51,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 11:18:51,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 11:18:51,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 11:18:51,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 11:18:52,004 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 11:18:52,020 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 11:18:52,024 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 11:18:52,025 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 11:18:52,025 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 11:18:52,026 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum05-2.i [2019-09-07 11:18:52,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1eeb34478/576a68eba2f549fca6b8426ac3b8acc5/FLAGa854e70ad [2019-09-07 11:18:52,508 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 11:18:52,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum05-2.i [2019-09-07 11:18:52,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1eeb34478/576a68eba2f549fca6b8426ac3b8acc5/FLAGa854e70ad [2019-09-07 11:18:52,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1eeb34478/576a68eba2f549fca6b8426ac3b8acc5 [2019-09-07 11:18:52,873 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 11:18:52,875 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 11:18:52,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 11:18:52,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 11:18:52,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 11:18:52,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 11:18:52" (1/1) ... [2019-09-07 11:18:52,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b08670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:18:52, skipping insertion in model container [2019-09-07 11:18:52,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 11:18:52" (1/1) ... [2019-09-07 11:18:52,891 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 11:18:52,913 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 11:18:53,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 11:18:53,113 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 11:18:53,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 11:18:53,147 INFO L192 MainTranslator]: Completed translation [2019-09-07 11:18:53,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:18:53 WrapperNode [2019-09-07 11:18:53,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 11:18:53,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 11:18:53,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 11:18:53,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 11:18:53,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:18:53" (1/1) ... [2019-09-07 11:18:53,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:18:53" (1/1) ... [2019-09-07 11:18:53,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:18:53" (1/1) ... [2019-09-07 11:18:53,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:18:53" (1/1) ... [2019-09-07 11:18:53,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:18:53" (1/1) ... [2019-09-07 11:18:53,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:18:53" (1/1) ... [2019-09-07 11:18:53,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:18:53" (1/1) ... [2019-09-07 11:18:53,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 11:18:53,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 11:18:53,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 11:18:53,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 11:18:53,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:18:53" (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 [2019-09-07 11:18:53,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 11:18:53,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 11:18:53,343 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-09-07 11:18:53,343 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 11:18:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 11:18:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 11:18:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-09-07 11:18:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 11:18:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 11:18:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 11:18:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 11:18:53,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 11:18:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 11:18:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 11:18:53,582 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 11:18:53,583 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-07 11:18:53,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 11:18:53 BoogieIcfgContainer [2019-09-07 11:18:53,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 11:18:53,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 11:18:53,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 11:18:53,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 11:18:53,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 11:18:52" (1/3) ... [2019-09-07 11:18:53,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596b8619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 11:18:53, skipping insertion in model container [2019-09-07 11:18:53,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:18:53" (2/3) ... [2019-09-07 11:18:53,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596b8619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 11:18:53, skipping insertion in model container [2019-09-07 11:18:53,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 11:18:53" (3/3) ... [2019-09-07 11:18:53,592 INFO L109 eAbstractionObserver]: Analyzing ICFG sum05-2.i [2019-09-07 11:18:53,603 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 11:18:53,610 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 11:18:53,627 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 11:18:53,657 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 11:18:53,658 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 11:18:53,658 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 11:18:53,658 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 11:18:53,658 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 11:18:53,659 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 11:18:53,659 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 11:18:53,659 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 11:18:53,659 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 11:18:53,681 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-09-07 11:18:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 11:18:53,689 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:18:53,690 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:18:53,692 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:18:53,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:18:53,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1461178031, now seen corresponding path program 1 times [2019-09-07 11:18:53,700 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:18:53,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:18:53,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:53,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:18:53,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:18:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-07 11:18:53,849 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:18:53,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 11:18:53,853 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 11:18:53,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 11:18:53,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 11:18:53,869 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2019-09-07 11:18:53,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:18:53,891 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-09-07 11:18:53,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 11:18:53,892 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-09-07 11:18:53,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:18:53,901 INFO L225 Difference]: With dead ends: 54 [2019-09-07 11:18:53,901 INFO L226 Difference]: Without dead ends: 26 [2019-09-07 11:18:53,905 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 [2019-09-07 11:18:53,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-07 11:18:53,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-09-07 11:18:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-07 11:18:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-09-07 11:18:53,945 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-09-07 11:18:53,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:18:53,945 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-09-07 11:18:53,946 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 11:18:53,946 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-09-07 11:18:53,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 11:18:53,948 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:18:53,948 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:18:53,949 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:18:53,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:18:53,949 INFO L82 PathProgramCache]: Analyzing trace with hash -595992629, now seen corresponding path program 1 times [2019-09-07 11:18:53,950 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:18:53,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:18:53,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:53,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:18:53,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:18:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-07 11:18:54,035 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:18:54,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 11:18:54,037 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 11:18:54,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 11:18:54,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 11:18:54,038 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-09-07 11:18:54,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:18:54,061 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-09-07 11:18:54,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 11:18:54,062 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-09-07 11:18:54,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:18:54,064 INFO L225 Difference]: With dead ends: 46 [2019-09-07 11:18:54,064 INFO L226 Difference]: Without dead ends: 28 [2019-09-07 11:18:54,065 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 [2019-09-07 11:18:54,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-07 11:18:54,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-09-07 11:18:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-07 11:18:54,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-09-07 11:18:54,073 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-09-07 11:18:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:18:54,074 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-09-07 11:18:54,074 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 11:18:54,074 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-09-07 11:18:54,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-07 11:18:54,075 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:18:54,076 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:18:54,076 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:18:54,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:18:54,077 INFO L82 PathProgramCache]: Analyzing trace with hash 169606189, now seen corresponding path program 1 times [2019-09-07 11:18:54,077 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:18:54,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:18:54,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:54,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:18:54,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:18:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-07 11:18:54,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:18:54,156 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) [2019-09-07 11:18:54,174 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 [2019-09-07 11:18:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:18:54,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-09-07 11:18:54,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:18:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:18:54,298 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:18:54,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-09-07 11:18:54,299 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 11:18:54,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 11:18:54,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 11:18:54,304 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 4 states. [2019-09-07 11:18:54,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:18:54,326 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-09-07 11:18:54,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 11:18:54,327 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-09-07 11:18:54,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:18:54,328 INFO L225 Difference]: With dead ends: 46 [2019-09-07 11:18:54,328 INFO L226 Difference]: Without dead ends: 29 [2019-09-07 11:18:54,329 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 11:18:54,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-07 11:18:54,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-09-07 11:18:54,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-07 11:18:54,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-09-07 11:18:54,336 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-09-07 11:18:54,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:18:54,336 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-09-07 11:18:54,336 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 11:18:54,337 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-09-07 11:18:54,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-07 11:18:54,338 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:18:54,338 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:18:54,338 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:18:54,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:18:54,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1462689141, now seen corresponding path program 1 times [2019-09-07 11:18:54,339 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:18:54,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:18:54,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:54,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:18:54,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:18:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 11:18:54,440 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:18:54,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 11:18:54,441 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 11:18:54,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 11:18:54,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 11:18:54,442 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-09-07 11:18:54,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:18:54,463 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-09-07 11:18:54,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 11:18:54,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-09-07 11:18:54,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:18:54,468 INFO L225 Difference]: With dead ends: 43 [2019-09-07 11:18:54,469 INFO L226 Difference]: Without dead ends: 30 [2019-09-07 11:18:54,469 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 [2019-09-07 11:18:54,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-07 11:18:54,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-09-07 11:18:54,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-07 11:18:54,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-09-07 11:18:54,476 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-09-07 11:18:54,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:18:54,478 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-09-07 11:18:54,479 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 11:18:54,479 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-09-07 11:18:54,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-07 11:18:54,480 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:18:54,480 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:18:54,481 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:18:54,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:18:54,481 INFO L82 PathProgramCache]: Analyzing trace with hash -233991671, now seen corresponding path program 1 times [2019-09-07 11:18:54,481 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:18:54,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:18:54,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:54,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:18:54,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:18:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 11:18:54,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:18:54,582 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 [2019-09-07 11:18:54,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:18:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:18:54,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 11:18:54,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:18:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 11:18:54,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:18:54,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 11:18:54,668 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 11:18:54,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 11:18:54,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 11:18:54,669 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2019-09-07 11:18:54,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:18:54,707 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2019-09-07 11:18:54,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 11:18:54,710 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-09-07 11:18:54,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:18:54,711 INFO L225 Difference]: With dead ends: 52 [2019-09-07 11:18:54,711 INFO L226 Difference]: Without dead ends: 32 [2019-09-07 11:18:54,713 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 11:18:54,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-07 11:18:54,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-09-07 11:18:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-07 11:18:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-09-07 11:18:54,721 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 42 [2019-09-07 11:18:54,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:18:54,722 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-09-07 11:18:54,722 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 11:18:54,722 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-09-07 11:18:54,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-07 11:18:54,724 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:18:54,724 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:18:54,724 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:18:54,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:18:54,725 INFO L82 PathProgramCache]: Analyzing trace with hash 4791275, now seen corresponding path program 2 times [2019-09-07 11:18:54,725 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:18:54,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:18:54,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:54,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:18:54,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:18:54,831 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 11:18:54,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:18:54,831 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) [2019-09-07 11:18:54,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:18:54,906 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:18:54,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:18:54,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 11:18:54,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:18:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 11:18:54,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:18:54,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-09-07 11:18:54,948 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 11:18:54,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 11:18:54,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:18:54,954 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2019-09-07 11:18:54,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:18:55,000 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2019-09-07 11:18:55,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 11:18:55,001 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2019-09-07 11:18:55,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:18:55,002 INFO L225 Difference]: With dead ends: 57 [2019-09-07 11:18:55,002 INFO L226 Difference]: Without dead ends: 37 [2019-09-07 11:18:55,003 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:18:55,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-07 11:18:55,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-09-07 11:18:55,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-07 11:18:55,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-09-07 11:18:55,009 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 44 [2019-09-07 11:18:55,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:18:55,009 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-09-07 11:18:55,009 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 11:18:55,009 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-09-07 11:18:55,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-07 11:18:55,011 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:18:55,011 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:18:55,011 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:18:55,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:18:55,012 INFO L82 PathProgramCache]: Analyzing trace with hash 602858155, now seen corresponding path program 3 times [2019-09-07 11:18:55,012 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:18:55,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:18:55,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:55,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:18:55,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:18:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-09-07 11:18:55,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:18:55,093 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:18:55,103 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 11:18:55,136 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 11:18:55,136 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:18:55,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 11:18:55,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:18:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-09-07 11:18:55,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:18:55,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-09-07 11:18:55,166 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 11:18:55,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 11:18:55,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:18:55,167 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 7 states. [2019-09-07 11:18:55,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:18:55,222 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2019-09-07 11:18:55,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 11:18:55,223 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2019-09-07 11:18:55,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:18:55,224 INFO L225 Difference]: With dead ends: 62 [2019-09-07 11:18:55,227 INFO L226 Difference]: Without dead ends: 41 [2019-09-07 11:18:55,228 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:18:55,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-07 11:18:55,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-09-07 11:18:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-07 11:18:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-09-07 11:18:55,239 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-09-07 11:18:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:18:55,239 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-09-07 11:18:55,239 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 11:18:55,240 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-09-07 11:18:55,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-07 11:18:55,241 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:18:55,241 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:18:55,244 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:18:55,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:18:55,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1131907463, now seen corresponding path program 4 times [2019-09-07 11:18:55,245 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:18:55,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:18:55,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:55,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:18:55,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:18:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-09-07 11:18:55,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:18:55,336 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:18:55,351 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:18:55,392 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:18:55,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:18:55,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 11:18:55,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:18:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 52 proven. 9 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-09-07 11:18:55,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:18:55,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-09-07 11:18:55,470 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 11:18:55,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 11:18:55,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-09-07 11:18:55,471 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 10 states. [2019-09-07 11:18:55,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:18:55,540 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-09-07 11:18:55,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 11:18:55,541 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2019-09-07 11:18:55,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:18:55,542 INFO L225 Difference]: With dead ends: 71 [2019-09-07 11:18:55,542 INFO L226 Difference]: Without dead ends: 45 [2019-09-07 11:18:55,543 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-09-07 11:18:55,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-07 11:18:55,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2019-09-07 11:18:55,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-07 11:18:55,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-09-07 11:18:55,549 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 60 [2019-09-07 11:18:55,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:18:55,549 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-09-07 11:18:55,550 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 11:18:55,550 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-09-07 11:18:55,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-07 11:18:55,551 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:18:55,551 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:18:55,551 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:18:55,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:18:55,552 INFO L82 PathProgramCache]: Analyzing trace with hash 236717639, now seen corresponding path program 5 times [2019-09-07 11:18:55,552 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:18:55,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:18:55,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:55,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:18:55,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:18:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-09-07 11:18:55,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:18:55,641 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:18:55,662 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 11:18:55,731 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-07 11:18:55,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:18:55,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 11:18:55,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:18:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 84 proven. 16 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2019-09-07 11:18:55,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:18:55,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2019-09-07 11:18:55,827 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 11:18:55,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 11:18:55,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-07 11:18:55,828 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 10 states. [2019-09-07 11:18:55,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:18:55,886 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2019-09-07 11:18:55,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 11:18:55,886 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2019-09-07 11:18:55,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:18:55,887 INFO L225 Difference]: With dead ends: 75 [2019-09-07 11:18:55,887 INFO L226 Difference]: Without dead ends: 48 [2019-09-07 11:18:55,888 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-07 11:18:55,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-07 11:18:55,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-09-07 11:18:55,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-07 11:18:55,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-09-07 11:18:55,894 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 68 [2019-09-07 11:18:55,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:18:55,894 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-09-07 11:18:55,894 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 11:18:55,894 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-09-07 11:18:55,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-07 11:18:55,896 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:18:55,896 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:18:55,896 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:18:55,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:18:55,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1792933923, now seen corresponding path program 6 times [2019-09-07 11:18:55,897 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:18:55,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:18:55,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:55,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:18:55,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:18:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-09-07 11:18:55,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:18:55,981 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 [2019-09-07 11:18:55,991 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:18:56,086 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-07 11:18:56,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:18:56,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 11:18:56,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:18:56,157 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 130 proven. 9 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-09-07 11:18:56,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:18:56,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-09-07 11:18:56,165 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 11:18:56,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 11:18:56,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-09-07 11:18:56,165 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 11 states. [2019-09-07 11:18:56,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:18:56,233 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2019-09-07 11:18:56,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 11:18:56,235 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 76 [2019-09-07 11:18:56,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:18:56,236 INFO L225 Difference]: With dead ends: 83 [2019-09-07 11:18:56,236 INFO L226 Difference]: Without dead ends: 51 [2019-09-07 11:18:56,237 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-09-07 11:18:56,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-07 11:18:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-07 11:18:56,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-07 11:18:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-09-07 11:18:56,249 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 76 [2019-09-07 11:18:56,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:18:56,250 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-09-07 11:18:56,250 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 11:18:56,250 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-09-07 11:18:56,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-07 11:18:56,255 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:18:56,255 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:18:56,256 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:18:56,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:18:56,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1986573693, now seen corresponding path program 7 times [2019-09-07 11:18:56,256 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:18:56,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:18:56,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:56,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:18:56,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:18:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat