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_init6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-01 23:12:07,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-01 23:12:07,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-01 23:12:07,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-01 23:12:07,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-01 23:12:07,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-01 23:12:07,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-01 23:12:07,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-01 23:12:07,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-01 23:12:07,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-01 23:12:07,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-01 23:12:07,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-01 23:12:07,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-01 23:12:07,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-01 23:12:07,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-01 23:12:07,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-01 23:12:07,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-01 23:12:07,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-01 23:12:07,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-01 23:12:07,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-01 23:12:07,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-01 23:12:07,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-01 23:12:07,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-01 23:12:07,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-01 23:12:07,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-01 23:12:07,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-01 23:12:07,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-01 23:12:07,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-01 23:12:08,000 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 23:12:08,030 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-01 23:12:08,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-01 23:12:08,031 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-01 23:12:08,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-01 23:12:08,032 INFO L138 SettingsManager]: * Use SBE=true [2019-10-01 23:12:08,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-01 23:12:08,032 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-01 23:12:08,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-01 23:12:08,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-01 23:12:08,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-01 23:12:08,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-01 23:12:08,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-01 23:12:08,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-01 23:12:08,036 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-01 23:12:08,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-01 23:12:08,036 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-01 23:12:08,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-01 23:12:08,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-01 23:12:08,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-01 23:12:08,037 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-01 23:12:08,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-01 23:12:08,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-01 23:12:08,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-01 23:12:08,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-01 23:12:08,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-01 23:12:08,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-01 23:12:08,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-01 23:12:08,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-01 23:12:08,040 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-01 23:12:08,074 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-01 23:12:08,088 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-01 23:12:08,091 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-01 23:12:08,093 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-01 23:12:08,093 INFO L275 PluginConnector]: CDTParser initialized [2019-10-01 23:12:08,094 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2019-10-01 23:12:08,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b60ab3d2f/90400c7c074548e5928a284cabaee739/FLAG3ea0ad8f8 [2019-10-01 23:12:08,660 INFO L306 CDTParser]: Found 1 translation units. [2019-10-01 23:12:08,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2019-10-01 23:12:08,670 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b60ab3d2f/90400c7c074548e5928a284cabaee739/FLAG3ea0ad8f8 [2019-10-01 23:12:08,972 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b60ab3d2f/90400c7c074548e5928a284cabaee739 [2019-10-01 23:12:08,983 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-01 23:12:08,984 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-01 23:12:08,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-01 23:12:08,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-01 23:12:08,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-01 23:12:08,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 11:12:08" (1/1) ... [2019-10-01 23:12:08,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e1c27c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:12:08, skipping insertion in model container [2019-10-01 23:12:08,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 11:12:08" (1/1) ... [2019-10-01 23:12:09,000 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-01 23:12:09,019 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-01 23:12:09,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 23:12:09,193 INFO L188 MainTranslator]: Completed pre-run [2019-10-01 23:12:09,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 23:12:09,234 INFO L192 MainTranslator]: Completed translation [2019-10-01 23:12:09,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:12:09 WrapperNode [2019-10-01 23:12:09,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-01 23:12:09,235 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-01 23:12:09,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-01 23:12:09,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-01 23:12:09,343 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:12:09" (1/1) ... [2019-10-01 23:12:09,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:12:09" (1/1) ... [2019-10-01 23:12:09,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:12:09" (1/1) ... [2019-10-01 23:12:09,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:12:09" (1/1) ... [2019-10-01 23:12:09,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:12:09" (1/1) ... [2019-10-01 23:12:09,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:12:09" (1/1) ... [2019-10-01 23:12:09,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:12:09" (1/1) ... [2019-10-01 23:12:09,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-01 23:12:09,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-01 23:12:09,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-01 23:12:09,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-01 23:12:09,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:12:09" (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 23:12:09,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-01 23:12:09,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-01 23:12:09,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-01 23:12:09,449 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-01 23:12:09,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-01 23:12:09,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-01 23:12:09,450 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-01 23:12:09,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-01 23:12:09,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-01 23:12:09,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-01 23:12:09,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-01 23:12:09,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-01 23:12:09,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-01 23:12:09,684 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-01 23:12:09,685 INFO L283 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-01 23:12:09,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 11:12:09 BoogieIcfgContainer [2019-10-01 23:12:09,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-01 23:12:09,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-01 23:12:09,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-01 23:12:09,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-01 23:12:09,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.10 11:12:08" (1/3) ... [2019-10-01 23:12:09,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591cb9f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 11:12:09, skipping insertion in model container [2019-10-01 23:12:09,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 11:12:09" (2/3) ... [2019-10-01 23:12:09,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591cb9f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 11:12:09, skipping insertion in model container [2019-10-01 23:12:09,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 11:12:09" (3/3) ... [2019-10-01 23:12:09,695 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-2.i [2019-10-01 23:12:09,708 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-01 23:12:09,716 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-01 23:12:09,738 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-01 23:12:09,781 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-01 23:12:09,782 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-01 23:12:09,782 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-01 23:12:09,783 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-01 23:12:09,783 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-01 23:12:09,783 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-01 23:12:09,783 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-01 23:12:09,784 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-01 23:12:09,784 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-01 23:12:09,818 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-01 23:12:09,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-01 23:12:09,827 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:12:09,828 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] [2019-10-01 23:12:09,830 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:12:09,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:12:09,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1058720290, now seen corresponding path program 1 times [2019-10-01 23:12:09,840 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:12:09,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:12:09,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:09,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:12:09,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:09,989 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 23:12:09,992 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:12:09,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-01 23:12:09,996 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-01 23:12:10,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-01 23:12:10,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-01 23:12:10,015 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2019-10-01 23:12:10,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:12:10,045 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2019-10-01 23:12:10,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-01 23:12:10,047 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 23 [2019-10-01 23:12:10,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:12:10,057 INFO L225 Difference]: With dead ends: 59 [2019-10-01 23:12:10,057 INFO L226 Difference]: Without dead ends: 28 [2019-10-01 23:12:10,061 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 23:12:10,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-01 23:12:10,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-01 23:12:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-01 23:12:10,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-10-01 23:12:10,112 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2019-10-01 23:12:10,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:12:10,112 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-10-01 23:12:10,113 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-01 23:12:10,113 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-10-01 23:12:10,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-01 23:12:10,114 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:12:10,115 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] [2019-10-01 23:12:10,115 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:12:10,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:12:10,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1432039210, now seen corresponding path program 1 times [2019-10-01 23:12:10,116 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:12:10,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:12:10,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:10,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:12:10,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:10,209 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 23:12:10,210 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 23:12:10,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-01 23:12:10,213 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-01 23:12:10,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-01 23:12:10,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 23:12:10,215 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 3 states. [2019-10-01 23:12:10,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:12:10,362 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2019-10-01 23:12:10,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-01 23:12:10,364 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-10-01 23:12:10,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:12:10,365 INFO L225 Difference]: With dead ends: 55 [2019-10-01 23:12:10,365 INFO L226 Difference]: Without dead ends: 34 [2019-10-01 23:12:10,368 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 23:12:10,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-01 23:12:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-01 23:12:10,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-01 23:12:10,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-10-01 23:12:10,385 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2019-10-01 23:12:10,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:12:10,386 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-10-01 23:12:10,386 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-01 23:12:10,387 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-10-01 23:12:10,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-01 23:12:10,389 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:12:10,389 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, 1, 1, 1] [2019-10-01 23:12:10,389 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:12:10,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:12:10,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2002754829, now seen corresponding path program 1 times [2019-10-01 23:12:10,390 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:12:10,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:12:10,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:10,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:12:10,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-01 23:12:10,529 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:12:10,529 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 23:12:10,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:12:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:10,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 23:12:10,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:12:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-01 23:12:10,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:12:10,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-10-01 23:12:10,661 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-01 23:12:10,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-01 23:12:10,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-01 23:12:10,663 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 5 states. [2019-10-01 23:12:10,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:12:10,787 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2019-10-01 23:12:10,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-01 23:12:10,788 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2019-10-01 23:12:10,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:12:10,789 INFO L225 Difference]: With dead ends: 66 [2019-10-01 23:12:10,789 INFO L226 Difference]: Without dead ends: 40 [2019-10-01 23:12:10,790 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 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 23:12:10,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-01 23:12:10,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-01 23:12:10,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-01 23:12:10,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-10-01 23:12:10,799 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 29 [2019-10-01 23:12:10,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:12:10,799 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-10-01 23:12:10,799 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-01 23:12:10,800 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-10-01 23:12:10,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-01 23:12:10,801 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:12:10,801 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:12:10,801 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:12:10,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:12:10,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1979990410, now seen corresponding path program 2 times [2019-10-01 23:12:10,802 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:12:10,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:12:10,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:10,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:12:10,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-01 23:12:10,936 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:12:10,936 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) [2019-10-01 23:12:10,971 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:12:11,012 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:12:11,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:12:11,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-01 23:12:11,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:12:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-01 23:12:11,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:12:11,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-10-01 23:12:11,040 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-01 23:12:11,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-01 23:12:11,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-01 23:12:11,041 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2019-10-01 23:12:11,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:12:11,145 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2019-10-01 23:12:11,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-01 23:12:11,145 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-10-01 23:12:11,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:12:11,147 INFO L225 Difference]: With dead ends: 77 [2019-10-01 23:12:11,147 INFO L226 Difference]: Without dead ends: 46 [2019-10-01 23:12:11,148 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 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 23:12:11,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-01 23:12:11,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-01 23:12:11,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-01 23:12:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2019-10-01 23:12:11,157 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 35 [2019-10-01 23:12:11,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:12:11,158 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2019-10-01 23:12:11,158 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-01 23:12:11,158 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2019-10-01 23:12:11,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-01 23:12:11,159 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:12:11,159 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 23:12:11,160 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:12:11,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:12:11,160 INFO L82 PathProgramCache]: Analyzing trace with hash 682352339, now seen corresponding path program 3 times [2019-10-01 23:12:11,161 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:12:11,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:12:11,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:11,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:12:11,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-01 23:12:11,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:12:11,304 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 23:12:11,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:12:11,385 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-01 23:12:11,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:12:11,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-01 23:12:11,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:12:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (4)] Exception during sending of exit command (exit): Stream closed [2019-10-01 23:12:11,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:12:11,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-10-01 23:12:11,416 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-01 23:12:11,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-01 23:12:11,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-01 23:12:11,417 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 7 states. [2019-10-01 23:12:11,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:12:11,531 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2019-10-01 23:12:11,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-01 23:12:11,532 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2019-10-01 23:12:11,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:12:11,532 INFO L225 Difference]: With dead ends: 88 [2019-10-01 23:12:11,532 INFO L226 Difference]: Without dead ends: 52 [2019-10-01 23:12:11,533 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 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 23:12:11,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-01 23:12:11,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-10-01 23:12:11,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-01 23:12:11,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2019-10-01 23:12:11,547 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 41 [2019-10-01 23:12:11,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:12:11,548 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2019-10-01 23:12:11,548 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-01 23:12:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2019-10-01 23:12:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-01 23:12:11,551 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:12:11,551 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:12:11,552 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:12:11,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:12:11,552 INFO L82 PathProgramCache]: Analyzing trace with hash -411261930, now seen corresponding path program 4 times [2019-10-01 23:12:11,552 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:12:11,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:12:11,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:11,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:12:11,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:11,662 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-01 23:12:11,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:12:11,662 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:12:11,681 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:12:11,715 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:12:11,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:12:11,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-01 23:12:11,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:12:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-01 23:12:11,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:12:11,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-10-01 23:12:11,744 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-01 23:12:11,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-01 23:12:11,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-01 23:12:11,748 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 8 states. [2019-10-01 23:12:11,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:12:11,863 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2019-10-01 23:12:11,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-01 23:12:11,866 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2019-10-01 23:12:11,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:12:11,867 INFO L225 Difference]: With dead ends: 99 [2019-10-01 23:12:11,867 INFO L226 Difference]: Without dead ends: 58 [2019-10-01 23:12:11,868 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 23:12:11,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-01 23:12:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-10-01 23:12:11,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-01 23:12:11,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2019-10-01 23:12:11,875 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 47 [2019-10-01 23:12:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:12:11,875 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2019-10-01 23:12:11,876 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-01 23:12:11,876 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2019-10-01 23:12:11,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-01 23:12:11,877 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:12:11,877 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:12:11,877 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:12:11,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:12:11,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1179573581, now seen corresponding path program 5 times [2019-10-01 23:12:11,878 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:12:11,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:12:11,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:11,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:12:11,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:11,970 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 23:12:11,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:12:11,970 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 23:12:12,005 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 23:12:14,079 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-01 23:12:14,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:12:14,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-01 23:12:14,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:12:14,127 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 23:12:14,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:12:14,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-10-01 23:12:14,141 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-01 23:12:14,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-01 23:12:14,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-01 23:12:14,142 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 9 states. [2019-10-01 23:12:14,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:12:14,297 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2019-10-01 23:12:14,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-01 23:12:14,298 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2019-10-01 23:12:14,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:12:14,299 INFO L225 Difference]: With dead ends: 110 [2019-10-01 23:12:14,299 INFO L226 Difference]: Without dead ends: 64 [2019-10-01 23:12:14,300 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 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 23:12:14,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-01 23:12:14,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-10-01 23:12:14,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-01 23:12:14,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2019-10-01 23:12:14,317 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 53 [2019-10-01 23:12:14,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:12:14,318 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2019-10-01 23:12:14,318 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-01 23:12:14,319 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2019-10-01 23:12:14,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-01 23:12:14,320 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:12:14,320 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:12:14,322 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:12:14,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:12:14,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1766162870, now seen corresponding path program 6 times [2019-10-01 23:12:14,323 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:12:14,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:12:14,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:14,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:12:14,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-01 23:12:14,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:12:14,591 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:12:14,618 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 23:12:15,307 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-01 23:12:15,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:12:15,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-01 23:12:15,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:12:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-01 23:12:15,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:12:15,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-10-01 23:12:15,334 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-01 23:12:15,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-01 23:12:15,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-01 23:12:15,335 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 10 states. [2019-10-01 23:12:15,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:12:15,471 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2019-10-01 23:12:15,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-01 23:12:15,472 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2019-10-01 23:12:15,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:12:15,473 INFO L225 Difference]: With dead ends: 121 [2019-10-01 23:12:15,473 INFO L226 Difference]: Without dead ends: 70 [2019-10-01 23:12:15,474 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-01 23:12:15,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-01 23:12:15,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-10-01 23:12:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-01 23:12:15,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2019-10-01 23:12:15,482 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 59 [2019-10-01 23:12:15,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:12:15,482 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2019-10-01 23:12:15,482 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-01 23:12:15,482 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2019-10-01 23:12:15,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-01 23:12:15,483 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:12:15,484 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:12:15,484 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:12:15,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:12:15,484 INFO L82 PathProgramCache]: Analyzing trace with hash 728903315, now seen corresponding path program 7 times [2019-10-01 23:12:15,484 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:12:15,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:12:15,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:15,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:12:15,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-10-01 23:12:15,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:12:15,603 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 23:12:15,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:12:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:15,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-01 23:12:15,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:12:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-10-01 23:12:15,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:12:15,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-10-01 23:12:15,707 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-01 23:12:15,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-01 23:12:15,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-01 23:12:15,709 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 11 states. [2019-10-01 23:12:15,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:12:15,839 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2019-10-01 23:12:15,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-01 23:12:15,840 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2019-10-01 23:12:15,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:12:15,841 INFO L225 Difference]: With dead ends: 132 [2019-10-01 23:12:15,841 INFO L226 Difference]: Without dead ends: 76 [2019-10-01 23:12:15,842 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 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 23:12:15,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-01 23:12:15,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-10-01 23:12:15,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-01 23:12:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2019-10-01 23:12:15,849 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2019-10-01 23:12:15,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:12:15,850 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2019-10-01 23:12:15,850 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-01 23:12:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2019-10-01 23:12:15,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-01 23:12:15,851 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:12:15,851 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:12:15,851 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:12:15,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:12:15,852 INFO L82 PathProgramCache]: Analyzing trace with hash -688629930, now seen corresponding path program 8 times [2019-10-01 23:12:15,852 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:12:15,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:12:15,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:15,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:12:15,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-01 23:12:15,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:12:15,980 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:12:16,008 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:12:16,058 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:12:16,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:12:16,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-01 23:12:16,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:12:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-01 23:12:16,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:12:16,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-10-01 23:12:16,110 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-01 23:12:16,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-01 23:12:16,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-01 23:12:16,111 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 12 states. [2019-10-01 23:12:16,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:12:16,261 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2019-10-01 23:12:16,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-01 23:12:16,262 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2019-10-01 23:12:16,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:12:16,263 INFO L225 Difference]: With dead ends: 143 [2019-10-01 23:12:16,263 INFO L226 Difference]: Without dead ends: 82 [2019-10-01 23:12:16,264 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 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 23:12:16,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-01 23:12:16,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-10-01 23:12:16,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-10-01 23:12:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2019-10-01 23:12:16,272 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 71 [2019-10-01 23:12:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:12:16,272 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2019-10-01 23:12:16,272 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-01 23:12:16,272 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2019-10-01 23:12:16,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-01 23:12:16,274 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:12:16,274 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:12:16,274 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:12:16,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:12:16,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1278280307, now seen corresponding path program 9 times [2019-10-01 23:12:16,275 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:12:16,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:12:16,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:16,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:12:16,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-01 23:12:16,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:12:16,417 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) [2019-10-01 23:12:16,445 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:12:32,524 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-01 23:12:32,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:12:32,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-01 23:12:32,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:12:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-01 23:12:32,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:12:32,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-10-01 23:12:32,570 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-01 23:12:32,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-01 23:12:32,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-01 23:12:32,570 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 13 states. [2019-10-01 23:12:32,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:12:32,705 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2019-10-01 23:12:32,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-01 23:12:32,705 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2019-10-01 23:12:32,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:12:32,706 INFO L225 Difference]: With dead ends: 154 [2019-10-01 23:12:32,707 INFO L226 Difference]: Without dead ends: 88 [2019-10-01 23:12:32,708 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 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 23:12:32,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-01 23:12:32,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-10-01 23:12:32,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-01 23:12:32,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2019-10-01 23:12:32,716 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 77 [2019-10-01 23:12:32,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:12:32,716 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2019-10-01 23:12:32,716 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-01 23:12:32,716 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2019-10-01 23:12:32,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-01 23:12:32,717 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:12:32,717 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:12:32,718 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:12:32,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:12:32,718 INFO L82 PathProgramCache]: Analyzing trace with hash -106486538, now seen corresponding path program 10 times [2019-10-01 23:12:32,718 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:12:32,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:12:32,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:32,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:12:32,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-10-01 23:12:32,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:12:32,879 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 23:12:32,913 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:12:32,971 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:12:32,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:12:32,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-01 23:12:32,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:12:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-10-01 23:12:33,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:12:33,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-10-01 23:12:33,028 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-01 23:12:33,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-01 23:12:33,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-01 23:12:33,029 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand 14 states. [2019-10-01 23:12:33,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:12:33,195 INFO L93 Difference]: Finished difference Result 165 states and 182 transitions. [2019-10-01 23:12:33,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-01 23:12:33,196 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2019-10-01 23:12:33,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:12:33,197 INFO L225 Difference]: With dead ends: 165 [2019-10-01 23:12:33,197 INFO L226 Difference]: Without dead ends: 94 [2019-10-01 23:12:33,198 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-10-01 23:12:33,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-10-01 23:12:33,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-10-01 23:12:33,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-01 23:12:33,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2019-10-01 23:12:33,205 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 83 [2019-10-01 23:12:33,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:12:33,206 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2019-10-01 23:12:33,206 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-01 23:12:33,206 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2019-10-01 23:12:33,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-01 23:12:33,207 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:12:33,207 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:12:33,207 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:12:33,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:12:33,208 INFO L82 PathProgramCache]: Analyzing trace with hash -391143853, now seen corresponding path program 11 times [2019-10-01 23:12:33,208 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:12:33,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:12:33,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:33,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:12:33,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:12:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:12:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-01 23:12:33,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:12:33,359 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) [2019-10-01 23:12:33,383 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:13:04,788 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-01 23:13:04,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:13:04,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-01 23:13:04,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:13:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-01 23:13:04,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:13:04,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-10-01 23:13:04,854 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-01 23:13:04,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-01 23:13:04,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-10-01 23:13:04,855 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand 15 states. [2019-10-01 23:13:05,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:13:05,011 INFO L93 Difference]: Finished difference Result 176 states and 193 transitions. [2019-10-01 23:13:05,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-01 23:13:05,011 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 89 [2019-10-01 23:13:05,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:13:05,013 INFO L225 Difference]: With dead ends: 176 [2019-10-01 23:13:05,013 INFO L226 Difference]: Without dead ends: 100 [2019-10-01 23:13:05,014 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 89 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 23:13:05,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-01 23:13:05,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-10-01 23:13:05,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-01 23:13:05,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2019-10-01 23:13:05,033 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 89 [2019-10-01 23:13:05,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:13:05,033 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2019-10-01 23:13:05,033 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-01 23:13:05,033 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2019-10-01 23:13:05,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-01 23:13:05,034 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:13:05,034 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:13:05,035 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:13:05,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:13:05,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2080107158, now seen corresponding path program 12 times [2019-10-01 23:13:05,035 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:13:05,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:13:05,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:13:05,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:13:05,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:13:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:13:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2019-10-01 23:13:05,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:13:05,208 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) [2019-10-01 23:13:05,240 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:13:32,169 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-01 23:13:32,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:13:32,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-01 23:13:32,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:13:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 24 proven. 78 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2019-10-01 23:13:32,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:13:32,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 17 [2019-10-01 23:13:32,286 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-01 23:13:32,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-01 23:13:32,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-01 23:13:32,288 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 17 states. [2019-10-01 23:13:32,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:13:32,509 INFO L93 Difference]: Finished difference Result 187 states and 204 transitions. [2019-10-01 23:13:32,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-01 23:13:32,512 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 95 [2019-10-01 23:13:32,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:13:32,512 INFO L225 Difference]: With dead ends: 187 [2019-10-01 23:13:32,513 INFO L226 Difference]: Without dead ends: 106 [2019-10-01 23:13:32,513 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-01 23:13:32,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-01 23:13:32,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-10-01 23:13:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-01 23:13:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2019-10-01 23:13:32,521 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 95 [2019-10-01 23:13:32,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:13:32,521 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2019-10-01 23:13:32,521 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-01 23:13:32,521 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2019-10-01 23:13:32,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-01 23:13:32,522 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:13:32,522 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:13:32,523 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:13:32,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:13:32,523 INFO L82 PathProgramCache]: Analyzing trace with hash -332398029, now seen corresponding path program 13 times [2019-10-01 23:13:32,523 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:13:32,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:13:32,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:13:32,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:13:32,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:13:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:13:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2019-10-01 23:13:32,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:13:32,701 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 23:13:32,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:13:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:13:32,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-01 23:13:32,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:13:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (14)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 23:13:32,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:13:32,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-10-01 23:13:32,825 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-01 23:13:32,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-01 23:13:32,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-10-01 23:13:32,826 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand 17 states. [2019-10-01 23:13:33,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:13:33,046 INFO L93 Difference]: Finished difference Result 198 states and 215 transitions. [2019-10-01 23:13:33,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-01 23:13:33,048 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 101 [2019-10-01 23:13:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:13:33,050 INFO L225 Difference]: With dead ends: 198 [2019-10-01 23:13:33,050 INFO L226 Difference]: Without dead ends: 112 [2019-10-01 23:13:33,051 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 101 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 23:13:33,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-10-01 23:13:33,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-10-01 23:13:33,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-01 23:13:33,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2019-10-01 23:13:33,065 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 101 [2019-10-01 23:13:33,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:13:33,066 INFO L475 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2019-10-01 23:13:33,066 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-01 23:13:33,066 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2019-10-01 23:13:33,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-01 23:13:33,067 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:13:33,067 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:13:33,068 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:13:33,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:13:33,069 INFO L82 PathProgramCache]: Analyzing trace with hash -904878026, now seen corresponding path program 14 times [2019-10-01 23:13:33,070 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:13:33,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:13:33,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:13:33,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:13:33,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:13:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:13:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2019-10-01 23:13:33,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:13:33,302 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 23:13:33,333 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:13:33,401 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:13:33,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:13:33,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-01 23:13:33,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:13:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 525 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 23:13:33,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:13:33,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-10-01 23:13:33,459 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-01 23:13:33,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-01 23:13:33,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-10-01 23:13:33,460 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand 18 states. [2019-10-01 23:13:33,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:13:33,660 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2019-10-01 23:13:33,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-01 23:13:33,661 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 107 [2019-10-01 23:13:33,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:13:33,662 INFO L225 Difference]: With dead ends: 209 [2019-10-01 23:13:33,662 INFO L226 Difference]: Without dead ends: 118 [2019-10-01 23:13:33,663 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 107 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 23:13:33,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-01 23:13:33,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2019-10-01 23:13:33,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-10-01 23:13:33,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2019-10-01 23:13:33,669 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 107 [2019-10-01 23:13:33,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:13:33,670 INFO L475 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2019-10-01 23:13:33,670 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-01 23:13:33,670 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2019-10-01 23:13:33,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-01 23:13:33,671 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:13:33,671 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:13:33,671 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:13:33,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:13:33,672 INFO L82 PathProgramCache]: Analyzing trace with hash -2139869677, now seen corresponding path program 15 times [2019-10-01 23:13:33,672 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:13:33,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:13:33,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:13:33,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:13:33,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:13:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:13:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2019-10-01 23:13:33,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:13:33,900 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 23:13:33,926 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:14:17,449 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-01 23:14:17,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:14:17,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-01 23:14:17,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:14:17,540 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 45 proven. 120 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2019-10-01 23:14:17,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:14:17,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 20 [2019-10-01 23:14:17,563 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-01 23:14:17,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-01 23:14:17,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-01 23:14:17,564 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand 20 states. [2019-10-01 23:14:17,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:14:17,822 INFO L93 Difference]: Finished difference Result 220 states and 237 transitions. [2019-10-01 23:14:17,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-01 23:14:17,823 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 113 [2019-10-01 23:14:17,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:14:17,824 INFO L225 Difference]: With dead ends: 220 [2019-10-01 23:14:17,825 INFO L226 Difference]: Without dead ends: 124 [2019-10-01 23:14:17,826 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-01 23:14:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-10-01 23:14:17,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2019-10-01 23:14:17,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-10-01 23:14:17,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2019-10-01 23:14:17,832 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 113 [2019-10-01 23:14:17,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:14:17,832 INFO L475 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2019-10-01 23:14:17,832 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-01 23:14:17,832 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2019-10-01 23:14:17,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-01 23:14:17,833 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:14:17,834 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:14:17,834 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:14:17,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:14:17,834 INFO L82 PathProgramCache]: Analyzing trace with hash -243049002, now seen corresponding path program 16 times [2019-10-01 23:14:17,834 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:14:17,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:14:17,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:14:17,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:14:17,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:14:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:14:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2019-10-01 23:14:18,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:14:18,052 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 23:14:18,075 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:14:18,173 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:14:18,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:14:18,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-01 23:14:18,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:14:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2019-10-01 23:14:18,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:14:18,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-10-01 23:14:18,224 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-01 23:14:18,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-01 23:14:18,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-10-01 23:14:18,225 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand 20 states. [2019-10-01 23:14:18,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:14:18,489 INFO L93 Difference]: Finished difference Result 231 states and 248 transitions. [2019-10-01 23:14:18,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-01 23:14:18,489 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2019-10-01 23:14:18,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:14:18,491 INFO L225 Difference]: With dead ends: 231 [2019-10-01 23:14:18,491 INFO L226 Difference]: Without dead ends: 130 [2019-10-01 23:14:18,492 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 119 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 23:14:18,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-10-01 23:14:18,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2019-10-01 23:14:18,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-10-01 23:14:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 136 transitions. [2019-10-01 23:14:18,499 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 136 transitions. Word has length 119 [2019-10-01 23:14:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:14:18,499 INFO L475 AbstractCegarLoop]: Abstraction has 130 states and 136 transitions. [2019-10-01 23:14:18,499 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-01 23:14:18,499 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 136 transitions. [2019-10-01 23:14:18,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-01 23:14:18,500 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:14:18,501 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:14:18,501 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:14:18,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:14:18,501 INFO L82 PathProgramCache]: Analyzing trace with hash 767435251, now seen corresponding path program 17 times [2019-10-01 23:14:18,501 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:14:18,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:14:18,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:14:18,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:14:18,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:14:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:14:18,731 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2019-10-01 23:14:18,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:14:18,731 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 23:14:18,763 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 23:15:35,716 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-01 23:15:35,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:15:35,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-01 23:15:35,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:15:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2019-10-01 23:15:35,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:15:35,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-10-01 23:15:35,830 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-01 23:15:35,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-01 23:15:35,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-01 23:15:35,831 INFO L87 Difference]: Start difference. First operand 130 states and 136 transitions. Second operand 21 states. [2019-10-01 23:15:36,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:15:36,063 INFO L93 Difference]: Finished difference Result 242 states and 259 transitions. [2019-10-01 23:15:36,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-01 23:15:36,064 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 125 [2019-10-01 23:15:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:15:36,065 INFO L225 Difference]: With dead ends: 242 [2019-10-01 23:15:36,065 INFO L226 Difference]: Without dead ends: 136 [2019-10-01 23:15:36,066 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-10-01 23:15:36,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-10-01 23:15:36,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2019-10-01 23:15:36,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-10-01 23:15:36,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 142 transitions. [2019-10-01 23:15:36,073 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 142 transitions. Word has length 125 [2019-10-01 23:15:36,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:15:36,073 INFO L475 AbstractCegarLoop]: Abstraction has 136 states and 142 transitions. [2019-10-01 23:15:36,073 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-01 23:15:36,073 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 142 transitions. [2019-10-01 23:15:36,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-01 23:15:36,075 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:15:36,075 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:15:36,075 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:15:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:15:36,075 INFO L82 PathProgramCache]: Analyzing trace with hash -2123232394, now seen corresponding path program 18 times [2019-10-01 23:15:36,076 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:15:36,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:15:36,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:15:36,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:15:36,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:15:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:15:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2019-10-01 23:15:36,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:15:36,355 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 23:15:36,378 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 23:16:43,128 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-10-01 23:16:43,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:16:43,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-01 23:16:43,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:16:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2019-10-01 23:16:43,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:16:43,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-10-01 23:16:43,232 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-01 23:16:43,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-01 23:16:43,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-01 23:16:43,233 INFO L87 Difference]: Start difference. First operand 136 states and 142 transitions. Second operand 22 states. [2019-10-01 23:16:43,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:16:43,494 INFO L93 Difference]: Finished difference Result 253 states and 270 transitions. [2019-10-01 23:16:43,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-01 23:16:43,500 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 131 [2019-10-01 23:16:43,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:16:43,501 INFO L225 Difference]: With dead ends: 253 [2019-10-01 23:16:43,501 INFO L226 Difference]: Without dead ends: 142 [2019-10-01 23:16:43,502 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-10-01 23:16:43,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-10-01 23:16:43,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2019-10-01 23:16:43,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-10-01 23:16:43,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 148 transitions. [2019-10-01 23:16:43,508 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 148 transitions. Word has length 131 [2019-10-01 23:16:43,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:16:43,509 INFO L475 AbstractCegarLoop]: Abstraction has 142 states and 148 transitions. [2019-10-01 23:16:43,509 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-01 23:16:43,509 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 148 transitions. [2019-10-01 23:16:43,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-01 23:16:43,510 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:16:43,511 INFO L411 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 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 23:16:43,511 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:16:43,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:16:43,511 INFO L82 PathProgramCache]: Analyzing trace with hash -87040557, now seen corresponding path program 19 times [2019-10-01 23:16:43,511 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:16:43,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:16:43,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:16:43,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:16:43,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:16:43,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:16:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-10-01 23:16:43,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:16:43,800 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 23:16:43,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:16:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:16:43,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-01 23:16:43,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:16:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-10-01 23:16:44,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:16:44,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-10-01 23:16:44,015 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-01 23:16:44,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-01 23:16:44,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-10-01 23:16:44,016 INFO L87 Difference]: Start difference. First operand 142 states and 148 transitions. Second operand 23 states. [2019-10-01 23:16:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:16:44,311 INFO L93 Difference]: Finished difference Result 264 states and 281 transitions. [2019-10-01 23:16:44,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-01 23:16:44,311 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 137 [2019-10-01 23:16:44,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:16:44,312 INFO L225 Difference]: With dead ends: 264 [2019-10-01 23:16:44,312 INFO L226 Difference]: Without dead ends: 148 [2019-10-01 23:16:44,313 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-10-01 23:16:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-10-01 23:16:44,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2019-10-01 23:16:44,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-10-01 23:16:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 154 transitions. [2019-10-01 23:16:44,320 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 154 transitions. Word has length 137 [2019-10-01 23:16:44,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:16:44,321 INFO L475 AbstractCegarLoop]: Abstraction has 148 states and 154 transitions. [2019-10-01 23:16:44,321 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-01 23:16:44,321 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 154 transitions. [2019-10-01 23:16:44,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-01 23:16:44,322 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:16:44,322 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:16:44,323 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:16:44,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:16:44,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1786425622, now seen corresponding path program 20 times [2019-10-01 23:16:44,323 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:16:44,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:16:44,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:16:44,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:16:44,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:16:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:16:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2019-10-01 23:16:44,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:16:44,623 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 23:16:44,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:16:44,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:16:44,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:16:44,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-01 23:16:44,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:16:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2019-10-01 23:16:44,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:16:44,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-10-01 23:16:44,876 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-01 23:16:44,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-01 23:16:44,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-10-01 23:16:44,877 INFO L87 Difference]: Start difference. First operand 148 states and 154 transitions. Second operand 24 states. [2019-10-01 23:16:45,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:16:45,259 INFO L93 Difference]: Finished difference Result 275 states and 292 transitions. [2019-10-01 23:16:45,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-01 23:16:45,262 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 143 [2019-10-01 23:16:45,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:16:45,265 INFO L225 Difference]: With dead ends: 275 [2019-10-01 23:16:45,265 INFO L226 Difference]: Without dead ends: 154 [2019-10-01 23:16:45,266 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 23:16:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-10-01 23:16:45,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2019-10-01 23:16:45,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-10-01 23:16:45,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 160 transitions. [2019-10-01 23:16:45,277 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 160 transitions. Word has length 143 [2019-10-01 23:16:45,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:16:45,278 INFO L475 AbstractCegarLoop]: Abstraction has 154 states and 160 transitions. [2019-10-01 23:16:45,278 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-01 23:16:45,278 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 160 transitions. [2019-10-01 23:16:45,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-01 23:16:45,281 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:16:45,282 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:16:45,282 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:16:45,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:16:45,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1930731085, now seen corresponding path program 21 times [2019-10-01 23:16:45,283 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:16:45,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:16:45,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:16:45,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:16:45,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:16:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:16:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2019-10-01 23:16:45,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:16:45,758 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 23:16:45,804 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:18:05,822 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-01 23:18:05,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:18:05,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-01 23:18:05,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:18:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2019-10-01 23:18:05,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:18:05,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-10-01 23:18:05,939 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-01 23:18:05,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-01 23:18:05,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-10-01 23:18:05,940 INFO L87 Difference]: Start difference. First operand 154 states and 160 transitions. Second operand 25 states. [2019-10-01 23:18:06,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:18:06,268 INFO L93 Difference]: Finished difference Result 286 states and 303 transitions. [2019-10-01 23:18:06,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-01 23:18:06,269 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 149 [2019-10-01 23:18:06,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:18:06,271 INFO L225 Difference]: With dead ends: 286 [2019-10-01 23:18:06,271 INFO L226 Difference]: Without dead ends: 160 [2019-10-01 23:18:06,273 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 149 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 23:18:06,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-10-01 23:18:06,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2019-10-01 23:18:06,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-10-01 23:18:06,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 166 transitions. [2019-10-01 23:18:06,282 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 166 transitions. Word has length 149 [2019-10-01 23:18:06,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:18:06,283 INFO L475 AbstractCegarLoop]: Abstraction has 160 states and 166 transitions. [2019-10-01 23:18:06,283 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-01 23:18:06,283 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 166 transitions. [2019-10-01 23:18:06,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-01 23:18:06,286 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:18:06,286 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:18:06,286 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:18:06,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:18:06,287 INFO L82 PathProgramCache]: Analyzing trace with hash -558149962, now seen corresponding path program 22 times [2019-10-01 23:18:06,287 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:18:06,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:18:06,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:18:06,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:18:06,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:18:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:18:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2019-10-01 23:18:06,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:18:06,885 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 23:18:06,943 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:18:07,065 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:18:07,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:18:07,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-01 23:18:07,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:18:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2019-10-01 23:18:07,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:18:07,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-10-01 23:18:07,136 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-01 23:18:07,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-01 23:18:07,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-10-01 23:18:07,145 INFO L87 Difference]: Start difference. First operand 160 states and 166 transitions. Second operand 26 states. [2019-10-01 23:18:07,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:18:07,459 INFO L93 Difference]: Finished difference Result 297 states and 314 transitions. [2019-10-01 23:18:07,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-01 23:18:07,460 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 155 [2019-10-01 23:18:07,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:18:07,461 INFO L225 Difference]: With dead ends: 297 [2019-10-01 23:18:07,461 INFO L226 Difference]: Without dead ends: 166 [2019-10-01 23:18:07,462 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-10-01 23:18:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-10-01 23:18:07,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2019-10-01 23:18:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-10-01 23:18:07,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 172 transitions. [2019-10-01 23:18:07,470 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 172 transitions. Word has length 155 [2019-10-01 23:18:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:18:07,471 INFO L475 AbstractCegarLoop]: Abstraction has 166 states and 172 transitions. [2019-10-01 23:18:07,471 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-01 23:18:07,471 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 172 transitions. [2019-10-01 23:18:07,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-01 23:18:07,473 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:18:07,473 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:18:07,473 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:18:07,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:18:07,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1204989331, now seen corresponding path program 23 times [2019-10-01 23:18:07,474 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:18:07,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:18:07,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:18:07,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:18:07,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:18:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:18:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1380 trivial. 0 not checked. [2019-10-01 23:18:08,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:18:08,005 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 23:18:08,045 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 23:20:00,598 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-01 23:20:00,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:20:00,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-01 23:20:00,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:20:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1380 trivial. 0 not checked. [2019-10-01 23:20:00,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:20:00,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-10-01 23:20:00,726 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-01 23:20:00,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-01 23:20:00,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-10-01 23:20:00,727 INFO L87 Difference]: Start difference. First operand 166 states and 172 transitions. Second operand 27 states. [2019-10-01 23:20:01,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:20:01,113 INFO L93 Difference]: Finished difference Result 308 states and 325 transitions. [2019-10-01 23:20:01,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-01 23:20:01,114 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 161 [2019-10-01 23:20:01,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:20:01,115 INFO L225 Difference]: With dead ends: 308 [2019-10-01 23:20:01,116 INFO L226 Difference]: Without dead ends: 172 [2019-10-01 23:20:01,117 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 161 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 23:20:01,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-10-01 23:20:01,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2019-10-01 23:20:01,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-10-01 23:20:01,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 178 transitions. [2019-10-01 23:20:01,129 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 178 transitions. Word has length 161 [2019-10-01 23:20:01,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:20:01,130 INFO L475 AbstractCegarLoop]: Abstraction has 172 states and 178 transitions. [2019-10-01 23:20:01,130 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-01 23:20:01,130 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 178 transitions. [2019-10-01 23:20:01,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-01 23:20:01,134 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:20:01,134 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:20:01,134 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:20:01,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:20:01,135 INFO L82 PathProgramCache]: Analyzing trace with hash 835839062, now seen corresponding path program 24 times [2019-10-01 23:20:01,135 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:20:01,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:20:01,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:20:01,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:20:01,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:20:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:20:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1500 trivial. 0 not checked. [2019-10-01 23:20:01,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:20:01,816 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 23:20:01,877 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 23:21:45,920 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-01 23:21:45,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:21:45,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-01 23:21:45,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:21:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 72 proven. 300 refuted. 0 times theorem prover too weak. 1428 trivial. 0 not checked. [2019-10-01 23:21:46,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:21:46,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 29 [2019-10-01 23:21:46,074 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-01 23:21:46,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-01 23:21:46,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-10-01 23:21:46,075 INFO L87 Difference]: Start difference. First operand 172 states and 178 transitions. Second operand 29 states. [2019-10-01 23:21:46,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:21:46,498 INFO L93 Difference]: Finished difference Result 319 states and 336 transitions. [2019-10-01 23:21:46,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-01 23:21:46,499 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 167 [2019-10-01 23:21:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:21:46,501 INFO L225 Difference]: With dead ends: 319 [2019-10-01 23:21:46,501 INFO L226 Difference]: Without dead ends: 178 [2019-10-01 23:21:46,502 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-10-01 23:21:46,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-10-01 23:21:46,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2019-10-01 23:21:46,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-10-01 23:21:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 184 transitions. [2019-10-01 23:21:46,513 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 184 transitions. Word has length 167 [2019-10-01 23:21:46,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:21:46,513 INFO L475 AbstractCegarLoop]: Abstraction has 178 states and 184 transitions. [2019-10-01 23:21:46,514 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-01 23:21:46,514 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 184 transitions. [2019-10-01 23:21:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-01 23:21:46,517 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:21:46,518 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:21:46,518 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:21:46,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:21:46,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1841807731, now seen corresponding path program 25 times [2019-10-01 23:21:46,518 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:21:46,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:21:46,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:21:46,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:21:46,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:21:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:21:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1950 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1625 trivial. 0 not checked. [2019-10-01 23:21:47,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:21:47,032 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 23:21:47,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:21:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:21:47,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-01 23:21:47,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:21:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1950 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1625 trivial. 0 not checked. [2019-10-01 23:21:47,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:21:47,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-10-01 23:21:47,275 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-01 23:21:47,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-01 23:21:47,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-10-01 23:21:47,277 INFO L87 Difference]: Start difference. First operand 178 states and 184 transitions. Second operand 29 states. [2019-10-01 23:21:47,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:21:47,654 INFO L93 Difference]: Finished difference Result 330 states and 347 transitions. [2019-10-01 23:21:47,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-01 23:21:47,658 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 173 [2019-10-01 23:21:47,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:21:47,660 INFO L225 Difference]: With dead ends: 330 [2019-10-01 23:21:47,660 INFO L226 Difference]: Without dead ends: 184 [2019-10-01 23:21:47,661 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 173 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 23:21:47,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-10-01 23:21:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2019-10-01 23:21:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-10-01 23:21:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 190 transitions. [2019-10-01 23:21:47,667 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 190 transitions. Word has length 173 [2019-10-01 23:21:47,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:21:47,668 INFO L475 AbstractCegarLoop]: Abstraction has 184 states and 190 transitions. [2019-10-01 23:21:47,668 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-01 23:21:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 190 transitions. [2019-10-01 23:21:47,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-01 23:21:47,670 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:21:47,670 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:21:47,670 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:21:47,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:21:47,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1193512458, now seen corresponding path program 26 times [2019-10-01 23:21:47,671 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:21:47,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:21:47,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:21:47,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 23:21:47,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:21:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:21:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2106 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1755 trivial. 0 not checked. [2019-10-01 23:21:48,209 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:21:48,210 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 23:21:48,240 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 23:21:48,346 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 23:21:48,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:21:48,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-01 23:21:48,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:21:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2106 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1755 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (27)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 23:21:48,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:21:48,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-10-01 23:21:48,423 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-01 23:21:48,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-01 23:21:48,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-10-01 23:21:48,424 INFO L87 Difference]: Start difference. First operand 184 states and 190 transitions. Second operand 30 states. [2019-10-01 23:21:48,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:21:48,776 INFO L93 Difference]: Finished difference Result 341 states and 358 transitions. [2019-10-01 23:21:48,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-01 23:21:48,777 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 179 [2019-10-01 23:21:48,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:21:48,778 INFO L225 Difference]: With dead ends: 341 [2019-10-01 23:21:48,778 INFO L226 Difference]: Without dead ends: 190 [2019-10-01 23:21:48,779 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 179 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 23:21:48,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-10-01 23:21:48,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2019-10-01 23:21:48,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-10-01 23:21:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 196 transitions. [2019-10-01 23:21:48,786 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 196 transitions. Word has length 179 [2019-10-01 23:21:48,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:21:48,786 INFO L475 AbstractCegarLoop]: Abstraction has 190 states and 196 transitions. [2019-10-01 23:21:48,786 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-01 23:21:48,787 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 196 transitions. [2019-10-01 23:21:48,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-01 23:21:48,789 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:21:48,789 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:21:48,789 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:21:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:21:48,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1066179923, now seen corresponding path program 27 times [2019-10-01 23:21:48,790 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:21:48,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:21:48,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:21:48,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:21:48,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:21:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:21:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2019-10-01 23:21:49,350 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:21:49,350 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 23:21:49,384 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 23:23:44,290 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-01 23:23:44,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:23:44,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-01 23:23:44,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:23:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 27 proven. 378 refuted. 0 times theorem prover too weak. 1863 trivial. 0 not checked. [2019-10-01 23:23:44,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:23:44,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 32 [2019-10-01 23:23:44,425 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-01 23:23:44,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-01 23:23:44,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-10-01 23:23:44,426 INFO L87 Difference]: Start difference. First operand 190 states and 196 transitions. Second operand 32 states. [2019-10-01 23:23:44,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:23:44,799 INFO L93 Difference]: Finished difference Result 352 states and 369 transitions. [2019-10-01 23:23:44,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-01 23:23:44,800 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 185 [2019-10-01 23:23:44,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:23:44,801 INFO L225 Difference]: With dead ends: 352 [2019-10-01 23:23:44,801 INFO L226 Difference]: Without dead ends: 196 [2019-10-01 23:23:44,805 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-10-01 23:23:44,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-10-01 23:23:44,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2019-10-01 23:23:44,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-10-01 23:23:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 202 transitions. [2019-10-01 23:23:44,817 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 202 transitions. Word has length 185 [2019-10-01 23:23:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:23:44,818 INFO L475 AbstractCegarLoop]: Abstraction has 196 states and 202 transitions. [2019-10-01 23:23:44,818 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-01 23:23:44,818 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 202 transitions. [2019-10-01 23:23:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-01 23:23:44,820 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:23:44,821 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:23:44,821 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:23:44,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:23:44,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1434912874, now seen corresponding path program 28 times [2019-10-01 23:23:44,822 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:23:44,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:23:44,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:23:44,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:23:44,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:23:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:23:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2436 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2019-10-01 23:23:45,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:23:45,324 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 23:23:45,354 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 23:23:45,477 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 23:23:45,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:23:45,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-01 23:23:45,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:23:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2436 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (29)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 23:23:45,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:23:45,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-10-01 23:23:45,525 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-01 23:23:45,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-01 23:23:45,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-10-01 23:23:45,526 INFO L87 Difference]: Start difference. First operand 196 states and 202 transitions. Second operand 32 states. [2019-10-01 23:23:45,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:23:45,938 INFO L93 Difference]: Finished difference Result 363 states and 380 transitions. [2019-10-01 23:23:45,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-01 23:23:45,939 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 191 [2019-10-01 23:23:45,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:23:45,941 INFO L225 Difference]: With dead ends: 363 [2019-10-01 23:23:45,941 INFO L226 Difference]: Without dead ends: 202 [2019-10-01 23:23:45,942 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-10-01 23:23:45,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-10-01 23:23:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2019-10-01 23:23:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-10-01 23:23:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 208 transitions. [2019-10-01 23:23:45,950 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 208 transitions. Word has length 191 [2019-10-01 23:23:45,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:23:45,950 INFO L475 AbstractCegarLoop]: Abstraction has 202 states and 208 transitions. [2019-10-01 23:23:45,950 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-01 23:23:45,950 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 208 transitions. [2019-10-01 23:23:45,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-10-01 23:23:45,951 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:23:45,952 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:23:45,952 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:23:45,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:23:45,952 INFO L82 PathProgramCache]: Analyzing trace with hash 476266803, now seen corresponding path program 29 times [2019-10-01 23:23:45,952 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:23:45,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:23:45,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:23:45,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:23:45,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:23:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:23:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2610 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2175 trivial. 0 not checked. [2019-10-01 23:23:46,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:23:46,760 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 23:23:46,827 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 23:26:16,052 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-10-01 23:26:16,052 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 23:26:16,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-01 23:26:16,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 23:26:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2610 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2175 trivial. 0 not checked. [2019-10-01 23:26:16,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 23:26:16,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-10-01 23:26:16,231 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-01 23:26:16,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-01 23:26:16,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-10-01 23:26:16,233 INFO L87 Difference]: Start difference. First operand 202 states and 208 transitions. Second operand 33 states. [2019-10-01 23:26:16,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 23:26:16,613 INFO L93 Difference]: Finished difference Result 374 states and 391 transitions. [2019-10-01 23:26:16,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-01 23:26:16,614 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 197 [2019-10-01 23:26:16,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 23:26:16,615 INFO L225 Difference]: With dead ends: 374 [2019-10-01 23:26:16,615 INFO L226 Difference]: Without dead ends: 208 [2019-10-01 23:26:16,616 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-10-01 23:26:16,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-10-01 23:26:16,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2019-10-01 23:26:16,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-10-01 23:26:16,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 214 transitions. [2019-10-01 23:26:16,624 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 214 transitions. Word has length 197 [2019-10-01 23:26:16,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 23:26:16,624 INFO L475 AbstractCegarLoop]: Abstraction has 208 states and 214 transitions. [2019-10-01 23:26:16,624 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-01 23:26:16,624 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 214 transitions. [2019-10-01 23:26:16,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-01 23:26:16,626 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 23:26:16,626 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-01 23:26:16,627 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 23:26:16,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 23:26:16,628 INFO L82 PathProgramCache]: Analyzing trace with hash -20613834, now seen corresponding path program 30 times [2019-10-01 23:26:16,628 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 23:26:16,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 23:26:16,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:26:16,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 23:26:16,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 23:26:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 23:26:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2325 trivial. 0 not checked. [2019-10-01 23:26:17,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 23:26:17,264 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 23:26:17,321 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE