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/array-examples/standard_copyInitSum3_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-01 22:57:27,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-01 22:57:27,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-01 22:57:27,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-01 22:57:27,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-01 22:57:27,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-01 22:57:27,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-01 22:57:27,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-01 22:57:27,796 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-01 22:57:27,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-01 22:57:27,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-01 22:57:27,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-01 22:57:27,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-01 22:57:27,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-01 22:57:27,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-01 22:57:27,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-01 22:57:27,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-01 22:57:27,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-01 22:57:27,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-01 22:57:27,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-01 22:57:27,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-01 22:57:27,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-01 22:57:27,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-01 22:57:27,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-01 22:57:27,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-01 22:57:27,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-01 22:57:27,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-01 22:57:27,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-01 22:57:27,833 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 [2019-10-01 22:57:27,856 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-01 22:57:27,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-01 22:57:27,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-01 22:57:27,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-01 22:57:27,859 INFO L138 SettingsManager]: * Use SBE=true [2019-10-01 22:57:27,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-01 22:57:27,859 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-01 22:57:27,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-01 22:57:27,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-01 22:57:27,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-01 22:57:27,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-01 22:57:27,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-01 22:57:27,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-01 22:57:27,862 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-01 22:57:27,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-01 22:57:27,862 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-01 22:57:27,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-01 22:57:27,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-01 22:57:27,863 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-01 22:57:27,863 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-01 22:57:27,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-01 22:57:27,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-01 22:57:27,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-01 22:57:27,864 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-01 22:57:27,864 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-01 22:57:27,864 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-01 22:57:27,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-01 22:57:27,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-01 22:57:27,865 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-01 22:57:27,906 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-01 22:57:27,922 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-01 22:57:27,928 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-01 22:57:27,930 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-01 22:57:27,931 INFO L275 PluginConnector]: CDTParser initialized [2019-10-01 22:57:27,931 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2019-10-01 22:57:28,008 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a526ae105/e0c5fcec5547449ea2b7c97ea2e311a4/FLAGb89b12bd0 [2019-10-01 22:57:28,506 INFO L306 CDTParser]: Found 1 translation units. [2019-10-01 22:57:28,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2019-10-01 22:57:28,514 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a526ae105/e0c5fcec5547449ea2b7c97ea2e311a4/FLAGb89b12bd0 [2019-10-01 22:57:28,866 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a526ae105/e0c5fcec5547449ea2b7c97ea2e311a4 [2019-10-01 22:57:28,878 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-01 22:57:28,881 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-01 22:57:28,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-01 22:57:28,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-01 22:57:28,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-01 22:57:28,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 10:57:28" (1/1) ... [2019-10-01 22:57:28,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2504eb85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:57:28, skipping insertion in model container [2019-10-01 22:57:28,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 10:57:28" (1/1) ... [2019-10-01 22:57:28,901 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-01 22:57:28,920 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-01 22:57:29,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 22:57:29,131 INFO L188 MainTranslator]: Completed pre-run [2019-10-01 22:57:29,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 22:57:29,268 INFO L192 MainTranslator]: Completed translation [2019-10-01 22:57:29,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:57:29 WrapperNode [2019-10-01 22:57:29,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-01 22:57:29,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-01 22:57:29,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-01 22:57:29,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-01 22:57:29,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:57:29" (1/1) ... [2019-10-01 22:57:29,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:57:29" (1/1) ... [2019-10-01 22:57:29,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:57:29" (1/1) ... [2019-10-01 22:57:29,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:57:29" (1/1) ... [2019-10-01 22:57:29,302 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:57:29" (1/1) ... [2019-10-01 22:57:29,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:57:29" (1/1) ... [2019-10-01 22:57:29,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:57:29" (1/1) ... [2019-10-01 22:57:29,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-01 22:57:29,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-01 22:57:29,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-01 22:57:29,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-01 22:57:29,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:57:29" (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 [2019-10-01 22:57:29,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-01 22:57:29,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-01 22:57:29,372 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-01 22:57:29,372 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-01 22:57:29,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-01 22:57:29,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-01 22:57:29,373 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-01 22:57:29,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-01 22:57:29,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-01 22:57:29,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-01 22:57:29,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-01 22:57:29,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-01 22:57:29,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-01 22:57:29,648 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-01 22:57:29,648 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-01 22:57:29,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 10:57:29 BoogieIcfgContainer [2019-10-01 22:57:29,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-01 22:57:29,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-01 22:57:29,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-01 22:57:29,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-01 22:57:29,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.10 10:57:28" (1/3) ... [2019-10-01 22:57:29,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ace62c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 10:57:29, skipping insertion in model container [2019-10-01 22:57:29,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:57:29" (2/3) ... [2019-10-01 22:57:29,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ace62c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 10:57:29, skipping insertion in model container [2019-10-01 22:57:29,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 10:57:29" (3/3) ... [2019-10-01 22:57:29,658 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum3_ground.i [2019-10-01 22:57:29,671 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-01 22:57:29,679 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-01 22:57:29,712 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-01 22:57:29,764 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-01 22:57:29,765 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-01 22:57:29,765 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-01 22:57:29,765 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-01 22:57:29,765 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-01 22:57:29,766 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-01 22:57:29,766 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-01 22:57:29,766 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-01 22:57:29,766 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-01 22:57:29,788 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-01 22:57:29,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-01 22:57:29,796 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:57:29,797 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:57:29,800 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:57:29,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:57:29,806 INFO L82 PathProgramCache]: Analyzing trace with hash 656367922, now seen corresponding path program 1 times [2019-10-01 22:57:29,808 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:57:29,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:57:29,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:29,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:57:29,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:57:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 22:57:29,949 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 22:57:29,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-01 22:57:29,952 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-01 22:57:29,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-01 22:57:29,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-01 22:57:29,967 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-10-01 22:57:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:57:29,990 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2019-10-01 22:57:29,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-01 22:57:29,991 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2019-10-01 22:57:29,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:57:29,998 INFO L225 Difference]: With dead ends: 57 [2019-10-01 22:57:29,999 INFO L226 Difference]: Without dead ends: 27 [2019-10-01 22:57:30,002 INFO L640 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 [2019-10-01 22:57:30,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-01 22:57:30,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-01 22:57:30,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-01 22:57:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-01 22:57:30,038 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-10-01 22:57:30,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:57:30,038 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-01 22:57:30,039 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-01 22:57:30,039 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-01 22:57:30,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-01 22:57:30,040 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:57:30,040 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:57:30,040 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:57:30,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:57:30,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1829979950, now seen corresponding path program 1 times [2019-10-01 22:57:30,041 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:57:30,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:57:30,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:30,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:57:30,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:57:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 22:57:30,105 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 22:57:30,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-01 22:57:30,107 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-01 22:57:30,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-01 22:57:30,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 22:57:30,108 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-10-01 22:57:30,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:57:30,206 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2019-10-01 22:57:30,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-01 22:57:30,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-01 22:57:30,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:57:30,208 INFO L225 Difference]: With dead ends: 54 [2019-10-01 22:57:30,208 INFO L226 Difference]: Without dead ends: 34 [2019-10-01 22:57:30,209 INFO L640 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 [2019-10-01 22:57:30,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-01 22:57:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2019-10-01 22:57:30,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-01 22:57:30,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-10-01 22:57:30,217 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 19 [2019-10-01 22:57:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:57:30,218 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-10-01 22:57:30,218 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-01 22:57:30,218 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-10-01 22:57:30,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-01 22:57:30,219 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:57:30,219 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:57:30,220 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:57:30,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:57:30,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1442018896, now seen corresponding path program 1 times [2019-10-01 22:57:30,220 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:57:30,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:57:30,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:30,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:57:30,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:30,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:57:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-01 22:57:30,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:57:30,312 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 [2019-10-01 22:57:30,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:57:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:57:30,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 22:57:30,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:57:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-01 22:57:30,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:57:30,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-10-01 22:57:30,456 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-01 22:57:30,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-01 22:57:30,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 22:57:30,461 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 5 states. [2019-10-01 22:57:30,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:57:30,581 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2019-10-01 22:57:30,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-01 22:57:30,582 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-10-01 22:57:30,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:57:30,583 INFO L225 Difference]: With dead ends: 64 [2019-10-01 22:57:30,583 INFO L226 Difference]: Without dead ends: 41 [2019-10-01 22:57:30,584 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 22:57:30,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-01 22:57:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-10-01 22:57:30,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-01 22:57:30,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-10-01 22:57:30,601 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 26 [2019-10-01 22:57:30,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:57:30,602 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-10-01 22:57:30,605 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-01 22:57:30,606 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-10-01 22:57:30,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-01 22:57:30,607 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:57:30,607 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:57:30,609 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:57:30,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:57:30,610 INFO L82 PathProgramCache]: Analyzing trace with hash 261695650, now seen corresponding path program 2 times [2019-10-01 22:57:30,610 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:57:30,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:57:30,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:30,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:57:30,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:57:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-01 22:57:30,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:57:30,724 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 [2019-10-01 22:57:30,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:57:30,787 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:57:30,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:57:30,789 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-01 22:57:30,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:57:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Stream closed [2019-10-01 22:57:30,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:57:30,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-10-01 22:57:30,821 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-01 22:57:30,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-01 22:57:30,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-01 22:57:30,823 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 6 states. [2019-10-01 22:57:30,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:57:30,956 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2019-10-01 22:57:30,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-01 22:57:30,957 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-10-01 22:57:30,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:57:30,958 INFO L225 Difference]: With dead ends: 77 [2019-10-01 22:57:30,958 INFO L226 Difference]: Without dead ends: 48 [2019-10-01 22:57:30,963 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-01 22:57:30,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-01 22:57:30,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2019-10-01 22:57:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-01 22:57:30,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-01 22:57:30,979 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 33 [2019-10-01 22:57:30,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:57:30,980 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-01 22:57:30,980 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-01 22:57:30,980 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-01 22:57:30,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-01 22:57:30,985 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:57:30,985 INFO L411 BasicCegarLoop]: trace histogram [3, 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] [2019-10-01 22:57:30,986 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:57:30,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:57:30,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1563249348, now seen corresponding path program 3 times [2019-10-01 22:57:30,987 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:57:30,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:57:30,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:30,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:57:30,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:57:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-01 22:57:31,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:57:31,159 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 [2019-10-01 22:57:31,183 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:57:31,216 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-01 22:57:31,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:57:31,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-01 22:57:31,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:57:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-01 22:57:31,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:57:31,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-10-01 22:57:31,245 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-01 22:57:31,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-01 22:57:31,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-01 22:57:31,245 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 7 states. [2019-10-01 22:57:31,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:57:31,358 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2019-10-01 22:57:31,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-01 22:57:31,363 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2019-10-01 22:57:31,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:57:31,364 INFO L225 Difference]: With dead ends: 90 [2019-10-01 22:57:31,364 INFO L226 Difference]: Without dead ends: 55 [2019-10-01 22:57:31,365 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-01 22:57:31,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-01 22:57:31,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2019-10-01 22:57:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-01 22:57:31,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2019-10-01 22:57:31,373 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 40 [2019-10-01 22:57:31,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:57:31,374 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2019-10-01 22:57:31,374 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-01 22:57:31,374 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2019-10-01 22:57:31,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-01 22:57:31,375 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:57:31,376 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:57:31,376 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:57:31,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:57:31,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1161905130, now seen corresponding path program 4 times [2019-10-01 22:57:31,377 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:57:31,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:57:31,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:31,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:57:31,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:57:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-01 22:57:31,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:57:31,506 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) [2019-10-01 22:57:31,541 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:57:31,586 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:57:31,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:57:31,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-01 22:57:31,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:57:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-01 22:57:31,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:57:31,628 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-10-01 22:57:31,630 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-01 22:57:31,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-01 22:57:31,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-01 22:57:31,632 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 8 states. [2019-10-01 22:57:31,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:57:31,767 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2019-10-01 22:57:31,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-01 22:57:31,769 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2019-10-01 22:57:31,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:57:31,775 INFO L225 Difference]: With dead ends: 103 [2019-10-01 22:57:31,776 INFO L226 Difference]: Without dead ends: 62 [2019-10-01 22:57:31,777 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-01 22:57:31,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-01 22:57:31,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2019-10-01 22:57:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-01 22:57:31,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2019-10-01 22:57:31,786 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 47 [2019-10-01 22:57:31,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:57:31,786 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2019-10-01 22:57:31,786 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-01 22:57:31,787 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2019-10-01 22:57:31,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-01 22:57:31,788 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:57:31,788 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:57:31,789 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:57:31,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:57:31,789 INFO L82 PathProgramCache]: Analyzing trace with hash 104059192, now seen corresponding path program 5 times [2019-10-01 22:57:31,789 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:57:31,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:57:31,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:31,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:57:31,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:57:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-01 22:57:31,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:57:31,926 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:57:31,959 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:57:32,601 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-01 22:57:32,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:57:32,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-01 22:57:32,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:57:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-01 22:57:32,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:57:32,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-10-01 22:57:32,642 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-01 22:57:32,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-01 22:57:32,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-01 22:57:32,645 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 9 states. [2019-10-01 22:57:32,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:57:32,797 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2019-10-01 22:57:32,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-01 22:57:32,798 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2019-10-01 22:57:32,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:57:32,800 INFO L225 Difference]: With dead ends: 116 [2019-10-01 22:57:32,800 INFO L226 Difference]: Without dead ends: 69 [2019-10-01 22:57:32,801 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-01 22:57:32,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-01 22:57:32,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2019-10-01 22:57:32,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-01 22:57:32,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-10-01 22:57:32,809 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 54 [2019-10-01 22:57:32,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:57:32,810 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-10-01 22:57:32,810 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-01 22:57:32,810 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-10-01 22:57:32,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-01 22:57:32,812 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:57:32,812 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:57:32,812 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:57:32,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:57:32,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1385759114, now seen corresponding path program 6 times [2019-10-01 22:57:32,813 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:57:32,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:57:32,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:32,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:57:32,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:57:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-01 22:57:32,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:57:32,959 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) [2019-10-01 22:57:32,981 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:57:33,608 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-01 22:57:33,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:57:33,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-01 22:57:33,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:57:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 22:57:33,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:57:33,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-10-01 22:57:33,646 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-01 22:57:33,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-01 22:57:33,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-01 22:57:33,647 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 10 states. [2019-10-01 22:57:33,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:57:33,775 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2019-10-01 22:57:33,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-01 22:57:33,775 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2019-10-01 22:57:33,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:57:33,776 INFO L225 Difference]: With dead ends: 129 [2019-10-01 22:57:33,777 INFO L226 Difference]: Without dead ends: 76 [2019-10-01 22:57:33,777 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-01 22:57:33,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-01 22:57:33,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2019-10-01 22:57:33,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-01 22:57:33,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-10-01 22:57:33,786 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 61 [2019-10-01 22:57:33,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:57:33,787 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-10-01 22:57:33,787 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-01 22:57:33,787 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-10-01 22:57:33,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-01 22:57:33,788 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:57:33,789 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:57:33,789 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:57:33,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:57:33,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1895565740, now seen corresponding path program 7 times [2019-10-01 22:57:33,790 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:57:33,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:57:33,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:33,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:57:33,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:57:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-01 22:57:33,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:57:33,980 INFO L224 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 [2019-10-01 22:57:34,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:57:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:57:34,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-01 22:57:34,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:57:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-01 22:57:34,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:57:34,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-10-01 22:57:34,083 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-01 22:57:34,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-01 22:57:34,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-01 22:57:34,084 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 11 states. [2019-10-01 22:57:34,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:57:34,204 INFO L93 Difference]: Finished difference Result 142 states and 153 transitions. [2019-10-01 22:57:34,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-01 22:57:34,205 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2019-10-01 22:57:34,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:57:34,206 INFO L225 Difference]: With dead ends: 142 [2019-10-01 22:57:34,207 INFO L226 Difference]: Without dead ends: 83 [2019-10-01 22:57:34,207 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-01 22:57:34,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-01 22:57:34,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2019-10-01 22:57:34,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-01 22:57:34,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-10-01 22:57:34,215 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 68 [2019-10-01 22:57:34,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:57:34,216 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-10-01 22:57:34,216 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-01 22:57:34,216 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-10-01 22:57:34,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-01 22:57:34,217 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:57:34,217 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:57:34,217 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:57:34,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:57:34,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1749223170, now seen corresponding path program 8 times [2019-10-01 22:57:34,218 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:57:34,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:57:34,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:34,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:57:34,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:57:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2019-10-01 22:57:34,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:57:34,364 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:57:34,386 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:57:34,428 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:57:34,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:57:34,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-01 22:57:34,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:57:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-10-01 22:57:34,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:57:34,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-10-01 22:57:34,474 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-01 22:57:34,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-01 22:57:34,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-01 22:57:34,474 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 12 states. [2019-10-01 22:57:34,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:57:34,633 INFO L93 Difference]: Finished difference Result 155 states and 166 transitions. [2019-10-01 22:57:34,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-01 22:57:34,633 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2019-10-01 22:57:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:57:34,634 INFO L225 Difference]: With dead ends: 155 [2019-10-01 22:57:34,634 INFO L226 Difference]: Without dead ends: 90 [2019-10-01 22:57:34,635 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-01 22:57:34,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-01 22:57:34,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2019-10-01 22:57:34,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-01 22:57:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-10-01 22:57:34,643 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 75 [2019-10-01 22:57:34,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:57:34,643 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-10-01 22:57:34,643 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-01 22:57:34,644 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-10-01 22:57:34,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-01 22:57:34,645 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:57:34,645 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:57:34,645 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:57:34,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:57:34,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1643836448, now seen corresponding path program 9 times [2019-10-01 22:57:34,646 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:57:34,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:57:34,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:34,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:57:34,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:57:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2019-10-01 22:57:34,807 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:57:34,807 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:57:34,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:57:35,407 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-01 22:57:35,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:57:35,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-01 22:57:35,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:57:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-10-01 22:57:35,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:57:35,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-10-01 22:57:35,467 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-01 22:57:35,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-01 22:57:35,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-01 22:57:35,468 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 13 states. [2019-10-01 22:57:35,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:57:35,602 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2019-10-01 22:57:35,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-01 22:57:35,603 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2019-10-01 22:57:35,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:57:35,604 INFO L225 Difference]: With dead ends: 168 [2019-10-01 22:57:35,604 INFO L226 Difference]: Without dead ends: 97 [2019-10-01 22:57:35,604 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-01 22:57:35,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-01 22:57:35,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2019-10-01 22:57:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-01 22:57:35,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2019-10-01 22:57:35,611 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 82 [2019-10-01 22:57:35,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:57:35,612 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2019-10-01 22:57:35,612 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-01 22:57:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2019-10-01 22:57:35,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-01 22:57:35,613 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:57:35,613 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:57:35,613 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:57:35,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:57:35,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1732223602, now seen corresponding path program 10 times [2019-10-01 22:57:35,614 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:57:35,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:57:35,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:35,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:57:35,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:57:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2019-10-01 22:57:35,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:57:35,803 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:57:35,823 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:57:35,866 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:57:35,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:57:35,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-01 22:57:35,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:57:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 22:57:35,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:57:35,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-10-01 22:57:35,907 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-01 22:57:35,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-01 22:57:35,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-01 22:57:35,908 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 14 states. [2019-10-01 22:57:36,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:57:36,095 INFO L93 Difference]: Finished difference Result 181 states and 192 transitions. [2019-10-01 22:57:36,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-01 22:57:36,096 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2019-10-01 22:57:36,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:57:36,097 INFO L225 Difference]: With dead ends: 181 [2019-10-01 22:57:36,097 INFO L226 Difference]: Without dead ends: 104 [2019-10-01 22:57:36,097 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-01 22:57:36,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-01 22:57:36,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2019-10-01 22:57:36,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-01 22:57:36,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-10-01 22:57:36,105 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 89 [2019-10-01 22:57:36,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:57:36,105 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-10-01 22:57:36,105 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-01 22:57:36,105 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-10-01 22:57:36,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-01 22:57:36,106 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:57:36,106 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:57:36,107 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:57:36,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:57:36,107 INFO L82 PathProgramCache]: Analyzing trace with hash -2111467372, now seen corresponding path program 11 times [2019-10-01 22:57:36,107 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:57:36,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:57:36,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:36,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:57:36,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:57:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:57:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2019-10-01 22:57:36,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:57:36,246 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:57:36,284 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:58:28,796 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-01 22:58:28,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:58:28,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-01 22:58:28,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:58:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2019-10-01 22:58:28,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:58:28,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-10-01 22:58:28,882 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-01 22:58:28,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-01 22:58:28,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-01 22:58:28,883 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 15 states. [2019-10-01 22:58:29,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:58:29,022 INFO L93 Difference]: Finished difference Result 194 states and 205 transitions. [2019-10-01 22:58:29,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-01 22:58:29,023 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2019-10-01 22:58:29,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:58:29,024 INFO L225 Difference]: With dead ends: 194 [2019-10-01 22:58:29,024 INFO L226 Difference]: Without dead ends: 111 [2019-10-01 22:58:29,025 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-01 22:58:29,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-01 22:58:29,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2019-10-01 22:58:29,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-10-01 22:58:29,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2019-10-01 22:58:29,040 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 96 [2019-10-01 22:58:29,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:58:29,040 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2019-10-01 22:58:29,041 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-01 22:58:29,041 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2019-10-01 22:58:29,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-01 22:58:29,044 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:58:29,044 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:58:29,044 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:58:29,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:58:29,044 INFO L82 PathProgramCache]: Analyzing trace with hash -88736282, now seen corresponding path program 12 times [2019-10-01 22:58:29,045 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:58:29,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:58:29,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:58:29,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:58:29,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:58:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:58:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2019-10-01 22:58:29,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:58:29,249 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:58:29,279 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 22:59:09,519 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-01 22:59:09,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:59:09,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-01 22:59:09,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:59:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2019-10-01 22:59:09,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:59:09,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-10-01 22:59:09,607 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-01 22:59:09,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-01 22:59:09,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-01 22:59:09,608 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 16 states. [2019-10-01 22:59:09,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:59:09,842 INFO L93 Difference]: Finished difference Result 207 states and 218 transitions. [2019-10-01 22:59:09,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-01 22:59:09,842 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 103 [2019-10-01 22:59:09,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:59:09,846 INFO L225 Difference]: With dead ends: 207 [2019-10-01 22:59:09,846 INFO L226 Difference]: Without dead ends: 118 [2019-10-01 22:59:09,847 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-10-01 22:59:09,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-01 22:59:09,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2019-10-01 22:59:09,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-10-01 22:59:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2019-10-01 22:59:09,853 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 103 [2019-10-01 22:59:09,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:59:09,853 INFO L475 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2019-10-01 22:59:09,853 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-01 22:59:09,854 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2019-10-01 22:59:09,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-01 22:59:09,855 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:59:09,855 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:59:09,855 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:59:09,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:59:09,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1628381432, now seen corresponding path program 13 times [2019-10-01 22:59:09,856 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:59:09,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:59:09,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:59:09,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:59:09,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:59:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:59:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2019-10-01 22:59:10,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:59:10,024 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:59:10,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:59:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:59:10,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-01 22:59:10,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:59:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2019-10-01 22:59:10,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:59:10,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-10-01 22:59:10,156 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-01 22:59:10,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-01 22:59:10,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-01 22:59:10,157 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand 17 states. [2019-10-01 22:59:10,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:59:10,363 INFO L93 Difference]: Finished difference Result 220 states and 231 transitions. [2019-10-01 22:59:10,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-01 22:59:10,364 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 110 [2019-10-01 22:59:10,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:59:10,365 INFO L225 Difference]: With dead ends: 220 [2019-10-01 22:59:10,365 INFO L226 Difference]: Without dead ends: 125 [2019-10-01 22:59:10,366 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-01 22:59:10,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-01 22:59:10,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2019-10-01 22:59:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-10-01 22:59:10,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2019-10-01 22:59:10,372 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 110 [2019-10-01 22:59:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:59:10,372 INFO L475 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2019-10-01 22:59:10,373 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-01 22:59:10,373 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2019-10-01 22:59:10,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-01 22:59:10,374 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:59:10,374 INFO L411 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:59:10,374 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:59:10,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:59:10,375 INFO L82 PathProgramCache]: Analyzing trace with hash 674564954, now seen corresponding path program 14 times [2019-10-01 22:59:10,375 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:59:10,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:59:10,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:59:10,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:59:10,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:59:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:59:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-10-01 22:59:10,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:59:10,563 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:59:10,586 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:59:10,642 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:59:10,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:59:10,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-01 22:59:10,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:59:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (15)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 22:59:10,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:59:10,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-10-01 22:59:10,683 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-01 22:59:10,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-01 22:59:10,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-01 22:59:10,692 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand 18 states. [2019-10-01 22:59:10,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:59:10,937 INFO L93 Difference]: Finished difference Result 233 states and 244 transitions. [2019-10-01 22:59:10,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-01 22:59:10,938 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 117 [2019-10-01 22:59:10,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:59:10,939 INFO L225 Difference]: With dead ends: 233 [2019-10-01 22:59:10,939 INFO L226 Difference]: Without dead ends: 132 [2019-10-01 22:59:10,940 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-01 22:59:10,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-10-01 22:59:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2019-10-01 22:59:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-10-01 22:59:10,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2019-10-01 22:59:10,947 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 117 [2019-10-01 22:59:10,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:59:10,948 INFO L475 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2019-10-01 22:59:10,948 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-01 22:59:10,948 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2019-10-01 22:59:10,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-01 22:59:10,949 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:59:10,949 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:59:10,950 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:59:10,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:59:10,950 INFO L82 PathProgramCache]: Analyzing trace with hash -363733124, now seen corresponding path program 15 times [2019-10-01 22:59:10,950 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:59:10,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:59:10,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:59:10,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:59:10,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:59:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:59:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2019-10-01 22:59:11,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:59:11,184 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:59:11,216 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:59:15,668 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-01 22:59:15,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:59:15,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-01 22:59:15,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:59:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2019-10-01 22:59:15,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:59:15,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-10-01 22:59:15,720 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-01 22:59:15,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-01 22:59:15,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-01 22:59:15,721 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand 19 states. [2019-10-01 22:59:15,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:59:15,962 INFO L93 Difference]: Finished difference Result 246 states and 257 transitions. [2019-10-01 22:59:15,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-01 22:59:15,962 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 124 [2019-10-01 22:59:15,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:59:15,963 INFO L225 Difference]: With dead ends: 246 [2019-10-01 22:59:15,963 INFO L226 Difference]: Without dead ends: 139 [2019-10-01 22:59:15,964 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-10-01 22:59:15,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-10-01 22:59:15,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2019-10-01 22:59:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-10-01 22:59:15,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2019-10-01 22:59:15,968 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 124 [2019-10-01 22:59:15,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:59:15,968 INFO L475 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2019-10-01 22:59:15,968 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-01 22:59:15,968 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2019-10-01 22:59:15,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-01 22:59:15,970 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:59:15,970 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:59:15,970 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:59:15,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:59:15,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1571697970, now seen corresponding path program 16 times [2019-10-01 22:59:15,971 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:59:15,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:59:15,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:59:15,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:59:15,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:59:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:59:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2019-10-01 22:59:16,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:59:16,205 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:59:16,229 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:59:16,298 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:59:16,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:59:16,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-01 22:59:16,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:59:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2019-10-01 22:59:16,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:59:16,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-10-01 22:59:16,378 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-01 22:59:16,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-01 22:59:16,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-01 22:59:16,380 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 20 states. [2019-10-01 22:59:16,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:59:16,653 INFO L93 Difference]: Finished difference Result 259 states and 270 transitions. [2019-10-01 22:59:16,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-01 22:59:16,654 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 131 [2019-10-01 22:59:16,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:59:16,656 INFO L225 Difference]: With dead ends: 259 [2019-10-01 22:59:16,656 INFO L226 Difference]: Without dead ends: 146 [2019-10-01 22:59:16,657 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-01 22:59:16,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-10-01 22:59:16,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2019-10-01 22:59:16,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-10-01 22:59:16,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2019-10-01 22:59:16,662 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 131 [2019-10-01 22:59:16,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:59:16,663 INFO L475 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2019-10-01 22:59:16,663 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-01 22:59:16,663 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2019-10-01 22:59:16,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-01 22:59:16,664 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:59:16,664 INFO L411 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:59:16,665 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:59:16,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:59:16,665 INFO L82 PathProgramCache]: Analyzing trace with hash 985502192, now seen corresponding path program 17 times [2019-10-01 22:59:16,665 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:59:16,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:59:16,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:59:16,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:59:16,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:59:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:59:16,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2019-10-01 22:59:16,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:59:16,981 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:59:17,010 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 23:01:03,777 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-01 23:01:03,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:01:03,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-01 23:01:03,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:01:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2019-10-01 23:01:03,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:01:03,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-10-01 23:01:03,925 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-01 23:01:03,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-01 23:01:03,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-01 23:01:03,926 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand 21 states. [2019-10-01 23:01:04,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:01:04,150 INFO L93 Difference]: Finished difference Result 272 states and 283 transitions. [2019-10-01 23:01:04,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-01 23:01:04,150 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 138 [2019-10-01 23:01:04,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:01:04,151 INFO L225 Difference]: With dead ends: 272 [2019-10-01 23:01:04,151 INFO L226 Difference]: Without dead ends: 153 [2019-10-01 23:01:04,152 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-01 23:01:04,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-10-01 23:01:04,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2019-10-01 23:01:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-10-01 23:01:04,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2019-10-01 23:01:04,157 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 138 [2019-10-01 23:01:04,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:01:04,158 INFO L475 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2019-10-01 23:01:04,158 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-01 23:01:04,158 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2019-10-01 23:01:04,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-01 23:01:04,159 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:01:04,160 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:01:04,160 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:01:04,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:01:04,160 INFO L82 PathProgramCache]: Analyzing trace with hash 941702210, now seen corresponding path program 18 times [2019-10-01 23:01:04,160 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:01:04,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:01:04,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:01:04,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:01:04,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:01:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:01:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2019-10-01 23:01:04,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:01:04,507 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:01:04,544 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 23:02:52,110 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-01 23:02:52,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:02:52,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-01 23:02:52,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:02:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 70 proven. 324 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked. [2019-10-01 23:02:52,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:02:52,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 24 [2019-10-01 23:02:52,289 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-01 23:02:52,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-01 23:02:52,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-10-01 23:02:52,290 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 24 states. [2019-10-01 23:02:52,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:02:52,612 INFO L93 Difference]: Finished difference Result 289 states and 304 transitions. [2019-10-01 23:02:52,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-01 23:02:52,612 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 145 [2019-10-01 23:02:52,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:02:52,614 INFO L225 Difference]: With dead ends: 289 [2019-10-01 23:02:52,614 INFO L226 Difference]: Without dead ends: 164 [2019-10-01 23:02:52,615 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-10-01 23:02:52,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-10-01 23:02:52,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2019-10-01 23:02:52,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-10-01 23:02:52,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2019-10-01 23:02:52,621 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 145 [2019-10-01 23:02:52,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:02:52,622 INFO L475 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2019-10-01 23:02:52,622 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-01 23:02:52,622 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2019-10-01 23:02:52,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-01 23:02:52,623 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:02:52,624 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:02:52,624 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:02:52,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:02:52,624 INFO L82 PathProgramCache]: Analyzing trace with hash 356016054, now seen corresponding path program 19 times [2019-10-01 23:02:52,624 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:02:52,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:02:52,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:02:52,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:02:52,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:02:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:02:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1010 trivial. 0 not checked. [2019-10-01 23:02:53,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:02:53,049 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:02:53,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:02:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:02:53,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-01 23:02:53,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:02:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2019-10-01 23:02:53,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:02:53,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-10-01 23:02:53,275 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-01 23:02:53,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-01 23:02:53,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-10-01 23:02:53,276 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 24 states. [2019-10-01 23:02:53,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:02:53,538 INFO L93 Difference]: Finished difference Result 311 states and 322 transitions. [2019-10-01 23:02:53,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-01 23:02:53,541 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 159 [2019-10-01 23:02:53,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:02:53,542 INFO L225 Difference]: With dead ends: 311 [2019-10-01 23:02:53,543 INFO L226 Difference]: Without dead ends: 174 [2019-10-01 23:02:53,543 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-10-01 23:02:53,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-10-01 23:02:53,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2019-10-01 23:02:53,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-10-01 23:02:53,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2019-10-01 23:02:53,551 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 159 [2019-10-01 23:02:53,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:02:53,553 INFO L475 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2019-10-01 23:02:53,553 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-01 23:02:53,553 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2019-10-01 23:02:53,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-01 23:02:53,555 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:02:53,555 INFO L411 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:02:53,555 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:02:53,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:02:53,556 INFO L82 PathProgramCache]: Analyzing trace with hash -83292968, now seen corresponding path program 20 times [2019-10-01 23:02:53,556 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:02:53,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:02:53,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:02:53,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:02:53,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:02:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:02:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2019-10-01 23:02:54,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:02:54,079 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:02:54,108 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:02:54,182 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:02:54,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:02:54,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-01 23:02:54,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:02:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2019-10-01 23:02:54,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:02:54,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-10-01 23:02:54,235 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-01 23:02:54,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-01 23:02:54,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-10-01 23:02:54,236 INFO L87 Difference]: Start difference. First operand 171 states and 175 transitions. Second operand 25 states. [2019-10-01 23:02:54,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:02:54,681 INFO L93 Difference]: Finished difference Result 324 states and 335 transitions. [2019-10-01 23:02:54,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-01 23:02:54,686 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 166 [2019-10-01 23:02:54,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:02:54,688 INFO L225 Difference]: With dead ends: 324 [2019-10-01 23:02:54,688 INFO L226 Difference]: Without dead ends: 181 [2019-10-01 23:02:54,689 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-10-01 23:02:54,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-10-01 23:02:54,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2019-10-01 23:02:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-10-01 23:02:54,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2019-10-01 23:02:54,699 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 166 [2019-10-01 23:02:54,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:02:54,699 INFO L475 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2019-10-01 23:02:54,700 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-01 23:02:54,700 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2019-10-01 23:02:54,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-01 23:02:54,704 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:02:54,704 INFO L411 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:02:54,705 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:02:54,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:02:54,705 INFO L82 PathProgramCache]: Analyzing trace with hash 28063018, now seen corresponding path program 21 times [2019-10-01 23:02:54,706 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:02:54,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:02:54,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:02:54,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:02:54,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:02:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:02:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1221 trivial. 0 not checked. [2019-10-01 23:02:55,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:02:55,250 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:02:55,294 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:03:36,447 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-01 23:03:36,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:03:36,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-01 23:03:36,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:03:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1452 trivial. 0 not checked. [2019-10-01 23:03:36,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:03:36,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-10-01 23:03:36,522 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-01 23:03:36,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-01 23:03:36,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-10-01 23:03:36,523 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 26 states. [2019-10-01 23:03:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:03:36,849 INFO L93 Difference]: Finished difference Result 337 states and 348 transitions. [2019-10-01 23:03:36,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-01 23:03:36,850 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 173 [2019-10-01 23:03:36,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:03:36,851 INFO L225 Difference]: With dead ends: 337 [2019-10-01 23:03:36,851 INFO L226 Difference]: Without dead ends: 188 [2019-10-01 23:03:36,852 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-10-01 23:03:36,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-10-01 23:03:36,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 185. [2019-10-01 23:03:36,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-10-01 23:03:36,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2019-10-01 23:03:36,877 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 173 [2019-10-01 23:03:36,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:03:36,877 INFO L475 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2019-10-01 23:03:36,877 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-01 23:03:36,877 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2019-10-01 23:03:36,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-01 23:03:36,879 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:03:36,880 INFO L411 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:03:36,880 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:03:36,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:03:36,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1907174068, now seen corresponding path program 22 times [2019-10-01 23:03:36,881 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:03:36,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:03:36,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:03:36,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:03:36,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:03:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:03:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2019-10-01 23:03:37,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:03:37,404 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:03:37,454 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:03:37,539 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:03:37,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:03:37,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-01 23:03:37,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:03:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2019-10-01 23:03:37,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:03:37,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-10-01 23:03:37,600 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-01 23:03:37,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-01 23:03:37,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-10-01 23:03:37,610 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand 27 states. [2019-10-01 23:03:37,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:03:37,958 INFO L93 Difference]: Finished difference Result 350 states and 361 transitions. [2019-10-01 23:03:37,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-01 23:03:37,965 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 180 [2019-10-01 23:03:37,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:03:37,967 INFO L225 Difference]: With dead ends: 350 [2019-10-01 23:03:37,967 INFO L226 Difference]: Without dead ends: 195 [2019-10-01 23:03:37,968 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-10-01 23:03:37,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-10-01 23:03:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2019-10-01 23:03:37,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-10-01 23:03:37,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2019-10-01 23:03:37,975 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 180 [2019-10-01 23:03:37,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:03:37,975 INFO L475 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2019-10-01 23:03:37,975 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-01 23:03:37,975 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2019-10-01 23:03:37,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-01 23:03:37,977 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:03:37,977 INFO L411 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:03:37,978 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:03:37,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:03:37,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1575895906, now seen corresponding path program 23 times [2019-10-01 23:03:37,978 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:03:37,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:03:37,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:03:37,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:03:37,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:03:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:03:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1728 trivial. 0 not checked. [2019-10-01 23:03:38,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:03:38,405 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:03:38,436 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 23:06:42,886 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-10-01 23:06:42,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:06:42,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-01 23:06:43,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:06:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1452 trivial. 0 not checked. [2019-10-01 23:06:43,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:06:43,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-10-01 23:06:43,084 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-01 23:06:43,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-01 23:06:43,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-10-01 23:06:43,085 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand 28 states. [2019-10-01 23:06:43,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:06:43,464 INFO L93 Difference]: Finished difference Result 363 states and 374 transitions. [2019-10-01 23:06:43,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-01 23:06:43,465 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 187 [2019-10-01 23:06:43,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:06:43,466 INFO L225 Difference]: With dead ends: 363 [2019-10-01 23:06:43,466 INFO L226 Difference]: Without dead ends: 202 [2019-10-01 23:06:43,467 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-10-01 23:06:43,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-10-01 23:06:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2019-10-01 23:06:43,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-10-01 23:06:43,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2019-10-01 23:06:43,474 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 187 [2019-10-01 23:06:43,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:06:43,474 INFO L475 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2019-10-01 23:06:43,474 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-01 23:06:43,475 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2019-10-01 23:06:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-10-01 23:06:43,477 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:06:43,477 INFO L411 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:06:43,477 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:06:43,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:06:43,477 INFO L82 PathProgramCache]: Analyzing trace with hash -310685760, now seen corresponding path program 24 times [2019-10-01 23:06:43,478 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:06:43,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:06:43,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:06:43,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:06:43,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:06:43,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:06:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1875 trivial. 0 not checked. [2019-10-01 23:06:43,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:06:43,943 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:06:43,974 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 23:09:59,221 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2019-10-01 23:09:59,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:09:59,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-01 23:09:59,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:09:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1875 trivial. 0 not checked. [2019-10-01 23:09:59,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:09:59,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-10-01 23:09:59,372 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-01 23:09:59,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-01 23:09:59,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-10-01 23:09:59,373 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand 29 states. [2019-10-01 23:09:59,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:09:59,757 INFO L93 Difference]: Finished difference Result 376 states and 387 transitions. [2019-10-01 23:09:59,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-01 23:09:59,758 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 194 [2019-10-01 23:09:59,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:09:59,759 INFO L225 Difference]: With dead ends: 376 [2019-10-01 23:09:59,759 INFO L226 Difference]: Without dead ends: 209 [2019-10-01 23:09:59,762 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-10-01 23:09:59,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-10-01 23:09:59,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2019-10-01 23:09:59,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-10-01 23:09:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2019-10-01 23:09:59,771 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 194 [2019-10-01 23:09:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:09:59,772 INFO L475 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2019-10-01 23:09:59,772 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-01 23:09:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2019-10-01 23:09:59,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-10-01 23:09:59,773 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:09:59,773 INFO L411 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:09:59,773 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:09:59,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:09:59,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1216481774, now seen corresponding path program 25 times [2019-10-01 23:09:59,774 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:09:59,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:09:59,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:09:59,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:09:59,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:09:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:10:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2019-10-01 23:10:00,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:10:00,335 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:10:00,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:10:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:10:00,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-01 23:10:00,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:10:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2019-10-01 23:10:00,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:10:00,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-10-01 23:10:00,538 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-01 23:10:00,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-01 23:10:00,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-10-01 23:10:00,540 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand 30 states. [2019-10-01 23:10:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:10:01,067 INFO L93 Difference]: Finished difference Result 389 states and 400 transitions. [2019-10-01 23:10:01,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-01 23:10:01,068 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 201 [2019-10-01 23:10:01,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:10:01,070 INFO L225 Difference]: With dead ends: 389 [2019-10-01 23:10:01,070 INFO L226 Difference]: Without dead ends: 216 [2019-10-01 23:10:01,071 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-10-01 23:10:01,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-10-01 23:10:01,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2019-10-01 23:10:01,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-10-01 23:10:01,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2019-10-01 23:10:01,083 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 201 [2019-10-01 23:10:01,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:10:01,084 INFO L475 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2019-10-01 23:10:01,084 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-01 23:10:01,084 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2019-10-01 23:10:01,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-10-01 23:10:01,086 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:10:01,086 INFO L411 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:10:01,087 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:10:01,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:10:01,087 INFO L82 PathProgramCache]: Analyzing trace with hash -445154252, now seen corresponding path program 26 times [2019-10-01 23:10:01,088 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:10:01,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:10:01,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:10:01,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:10:01,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:10:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:10:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2187 trivial. 0 not checked. [2019-10-01 23:10:01,821 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:10:01,821 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:10:01,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:10:01,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:10:01,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:10:01,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-01 23:10:01,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:10:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2187 trivial. 0 not checked. [2019-10-01 23:10:02,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:10:02,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-10-01 23:10:02,023 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-01 23:10:02,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-01 23:10:02,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-10-01 23:10:02,024 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand 31 states. [2019-10-01 23:10:02,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:10:02,472 INFO L93 Difference]: Finished difference Result 402 states and 413 transitions. [2019-10-01 23:10:02,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-01 23:10:02,473 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 208 [2019-10-01 23:10:02,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:10:02,476 INFO L225 Difference]: With dead ends: 402 [2019-10-01 23:10:02,476 INFO L226 Difference]: Without dead ends: 223 [2019-10-01 23:10:02,478 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-10-01 23:10:02,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-10-01 23:10:02,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 220. [2019-10-01 23:10:02,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-10-01 23:10:02,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 224 transitions. [2019-10-01 23:10:02,488 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 224 transitions. Word has length 208 [2019-10-01 23:10:02,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:10:02,488 INFO L475 AbstractCegarLoop]: Abstraction has 220 states and 224 transitions. [2019-10-01 23:10:02,489 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-01 23:10:02,489 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 224 transitions. [2019-10-01 23:10:02,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-10-01 23:10:02,491 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:10:02,491 INFO L411 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:10:02,492 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:10:02,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:10:02,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1602609542, now seen corresponding path program 27 times [2019-10-01 23:10:02,492 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:10:02,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:10:02,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:10:02,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:10:02,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:10:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:10:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2019-10-01 23:10:03,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:10:03,335 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:10:03,402 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:11:18,180 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-01 23:11:18,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:11:18,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-01 23:11:18,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:11:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2019-10-01 23:11:18,282 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:11:18,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-10-01 23:11:18,283 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-01 23:11:18,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-01 23:11:18,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-10-01 23:11:18,284 INFO L87 Difference]: Start difference. First operand 220 states and 224 transitions. Second operand 32 states. [2019-10-01 23:11:18,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:11:18,794 INFO L93 Difference]: Finished difference Result 415 states and 426 transitions. [2019-10-01 23:11:18,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-01 23:11:18,795 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 215 [2019-10-01 23:11:18,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:11:18,796 INFO L225 Difference]: With dead ends: 415 [2019-10-01 23:11:18,796 INFO L226 Difference]: Without dead ends: 230 [2019-10-01 23:11:18,797 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-10-01 23:11:18,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-10-01 23:11:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2019-10-01 23:11:18,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-10-01 23:11:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 231 transitions. [2019-10-01 23:11:18,805 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 231 transitions. Word has length 215 [2019-10-01 23:11:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:11:18,805 INFO L475 AbstractCegarLoop]: Abstraction has 227 states and 231 transitions. [2019-10-01 23:11:18,805 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-01 23:11:18,806 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 231 transitions. [2019-10-01 23:11:18,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-01 23:11:18,807 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:11:18,807 INFO L411 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:11:18,807 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:11:18,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:11:18,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1740397224, now seen corresponding path program 28 times [2019-10-01 23:11:18,808 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:11:18,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:11:18,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:18,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:11:18,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:11:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2523 trivial. 0 not checked. [2019-10-01 23:11:19,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:11:19,347 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:11:19,391 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:11:19,488 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:11:19,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:11:19,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-01 23:11:19,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:11:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 2117 trivial. 0 not checked. [2019-10-01 23:11:19,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:11:19,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-10-01 23:11:19,576 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-01 23:11:19,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-01 23:11:19,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-10-01 23:11:19,577 INFO L87 Difference]: Start difference. First operand 227 states and 231 transitions. Second operand 33 states. [2019-10-01 23:11:19,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:11:19,972 INFO L93 Difference]: Finished difference Result 428 states and 439 transitions. [2019-10-01 23:11:19,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-01 23:11:19,973 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 222 [2019-10-01 23:11:19,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:11:19,974 INFO L225 Difference]: With dead ends: 428 [2019-10-01 23:11:19,974 INFO L226 Difference]: Without dead ends: 237 [2019-10-01 23:11:19,975 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-10-01 23:11:19,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-10-01 23:11:19,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2019-10-01 23:11:19,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2019-10-01 23:11:19,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 238 transitions. [2019-10-01 23:11:19,983 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 238 transitions. Word has length 222 [2019-10-01 23:11:19,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:11:19,983 INFO L475 AbstractCegarLoop]: Abstraction has 234 states and 238 transitions. [2019-10-01 23:11:19,983 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-01 23:11:19,983 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 238 transitions. [2019-10-01 23:11:19,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-10-01 23:11:19,985 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:11:19,985 INFO L411 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:11:19,985 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:11:19,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:11:19,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1413381882, now seen corresponding path program 29 times [2019-10-01 23:11:19,986 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:11:19,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:11:19,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:19,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:11:19,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:11:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:11:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2700 trivial. 0 not checked. [2019-10-01 23:11:20,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:11:20,606 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:11:20,646 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1