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/loop-acceleration/nested_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 11:44:38,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 11:44:38,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 11:44:38,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-05 11:44:38,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-05 11:44:38,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-05 11:44:38,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-05 11:44:38,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-05 11:44:38,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-05 11:44:38,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-05 11:44:38,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-05 11:44:38,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-05 11:44:38,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-05 11:44:38,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-05 11:44:38,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-05 11:44:38,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-05 11:44:38,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-05 11:44:38,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-05 11:44:38,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-05 11:44:38,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-05 11:44:38,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-05 11:44:38,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-05 11:44:38,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-05 11:44:38,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-05 11:44:38,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-05 11:44:38,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-05 11:44:38,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-05 11:44:38,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-05 11:44:38,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-05 11:44:38,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-05 11:44:38,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-05 11:44:38,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-05 11:44:38,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-05 11:44:38,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 11:44:38,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 11:44:38,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 11:44:38,047 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-05 11:44:38,062 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 11:44:38,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 11:44:38,064 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-05 11:44:38,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-05 11:44:38,065 INFO L138 SettingsManager]: * Use SBE=true [2019-09-05 11:44:38,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 11:44:38,066 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 11:44:38,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-05 11:44:38,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 11:44:38,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 11:44:38,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 11:44:38,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 11:44:38,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 11:44:38,067 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 11:44:38,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 11:44:38,068 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-05 11:44:38,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 11:44:38,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 11:44:38,069 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 11:44:38,069 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-05 11:44:38,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-05 11:44:38,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 11:44:38,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 11:44:38,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 11:44:38,071 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-05 11:44:38,071 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-05 11:44:38,071 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 11:44:38,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 11:44:38,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-05 11:44:38,121 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 11:44:38,138 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 11:44:38,141 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 11:44:38,143 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 11:44:38,143 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 11:44:38,144 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2019-09-05 11:44:38,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a20bea9f/1f5bf831e8f24c8f8e2bdc2083c65bcb/FLAG0f94d5e51 [2019-09-05 11:44:38,642 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 11:44:38,643 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-2.c [2019-09-05 11:44:38,649 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a20bea9f/1f5bf831e8f24c8f8e2bdc2083c65bcb/FLAG0f94d5e51 [2019-09-05 11:44:39,071 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a20bea9f/1f5bf831e8f24c8f8e2bdc2083c65bcb [2019-09-05 11:44:39,080 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 11:44:39,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 11:44:39,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 11:44:39,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 11:44:39,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 11:44:39,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 11:44:39" (1/1) ... [2019-09-05 11:44:39,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6595b9fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:44:39, skipping insertion in model container [2019-09-05 11:44:39,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 11:44:39" (1/1) ... [2019-09-05 11:44:39,097 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 11:44:39,113 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 11:44:39,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 11:44:39,337 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 11:44:39,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 11:44:39,374 INFO L192 MainTranslator]: Completed translation [2019-09-05 11:44:39,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:44:39 WrapperNode [2019-09-05 11:44:39,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 11:44:39,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 11:44:39,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 11:44:39,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 11:44:39,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:44:39" (1/1) ... [2019-09-05 11:44:39,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:44:39" (1/1) ... [2019-09-05 11:44:39,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:44:39" (1/1) ... [2019-09-05 11:44:39,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:44:39" (1/1) ... [2019-09-05 11:44:39,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:44:39" (1/1) ... [2019-09-05 11:44:39,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:44:39" (1/1) ... [2019-09-05 11:44:39,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:44:39" (1/1) ... [2019-09-05 11:44:39,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 11:44:39,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 11:44:39,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 11:44:39,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 11:44:39,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:44:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 11:44:39,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 11:44:39,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 11:44:39,571 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 11:44:39,572 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 11:44:39,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 11:44:39,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 11:44:39,572 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 11:44:39,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 11:44:39,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 11:44:39,741 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 11:44:39,742 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-05 11:44:39,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 11:44:39 BoogieIcfgContainer [2019-09-05 11:44:39,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 11:44:39,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 11:44:39,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 11:44:39,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 11:44:39,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 11:44:39" (1/3) ... [2019-09-05 11:44:39,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa0c6b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 11:44:39, skipping insertion in model container [2019-09-05 11:44:39,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 11:44:39" (2/3) ... [2019-09-05 11:44:39,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa0c6b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 11:44:39, skipping insertion in model container [2019-09-05 11:44:39,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 11:44:39" (3/3) ... [2019-09-05 11:44:39,750 INFO L109 eAbstractionObserver]: Analyzing ICFG nested_1-2.c [2019-09-05 11:44:39,759 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 11:44:39,766 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 11:44:39,781 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 11:44:39,809 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-05 11:44:39,810 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 11:44:39,810 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-05 11:44:39,810 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 11:44:39,811 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 11:44:39,811 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 11:44:39,811 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 11:44:39,811 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 11:44:39,811 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 11:44:39,828 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-05 11:44:39,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 11:44:39,833 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:44:39,834 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:44:39,836 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:44:39,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:44:39,842 INFO L82 PathProgramCache]: Analyzing trace with hash -873786703, now seen corresponding path program 1 times [2019-09-05 11:44:39,843 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:44:39,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:44:39,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:39,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:44:39,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:44:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:44:40,056 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 11:44:40,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-05 11:44:40,061 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-05 11:44:40,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-05 11:44:40,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-05 11:44:40,089 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-09-05 11:44:40,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:44:40,150 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2019-09-05 11:44:40,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-05 11:44:40,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-05 11:44:40,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:44:40,162 INFO L225 Difference]: With dead ends: 36 [2019-09-05 11:44:40,162 INFO L226 Difference]: Without dead ends: 16 [2019-09-05 11:44:40,165 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-05 11:44:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-05 11:44:40,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2019-09-05 11:44:40,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-05 11:44:40,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-09-05 11:44:40,200 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-09-05 11:44:40,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:44:40,200 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-09-05 11:44:40,200 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-05 11:44:40,200 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-09-05 11:44:40,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-05 11:44:40,201 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:44:40,202 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:44:40,203 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:44:40,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:44:40,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1621360120, now seen corresponding path program 1 times [2019-09-05 11:44:40,203 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:44:40,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:44:40,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:40,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:44:40,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:44:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:44:40,287 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 11:44:40,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-05 11:44:40,288 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-05 11:44:40,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-05 11:44:40,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-05 11:44:40,289 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2019-09-05 11:44:40,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:44:40,302 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2019-09-05 11:44:40,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-05 11:44:40,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-09-05 11:44:40,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:44:40,304 INFO L225 Difference]: With dead ends: 23 [2019-09-05 11:44:40,304 INFO L226 Difference]: Without dead ends: 15 [2019-09-05 11:44:40,305 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-05 11:44:40,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-05 11:44:40,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-05 11:44:40,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-05 11:44:40,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-09-05 11:44:40,310 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2019-09-05 11:44:40,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:44:40,310 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-09-05 11:44:40,310 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-05 11:44:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-09-05 11:44:40,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-05 11:44:40,311 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:44:40,311 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:44:40,312 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:44:40,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:44:40,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1574756514, now seen corresponding path program 1 times [2019-09-05 11:44:40,312 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:44:40,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:44:40,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:40,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:44:40,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:44:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:44:40,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:44:40,408 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:44:40,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:44:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:44:40,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-05 11:44:40,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:44:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 11:44:40,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:44:40,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-09-05 11:44:40,497 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-05 11:44:40,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-05 11:44:40,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-05 11:44:40,498 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2019-09-05 11:44:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:44:40,613 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2019-09-05 11:44:40,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 11:44:40,614 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-09-05 11:44:40,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:44:40,615 INFO L225 Difference]: With dead ends: 34 [2019-09-05 11:44:40,615 INFO L226 Difference]: Without dead ends: 25 [2019-09-05 11:44:40,616 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-05 11:44:40,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-05 11:44:40,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2019-09-05 11:44:40,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-05 11:44:40,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-09-05 11:44:40,622 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2019-09-05 11:44:40,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:44:40,623 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-09-05 11:44:40,623 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-05 11:44:40,623 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-09-05 11:44:40,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-05 11:44:40,624 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:44:40,624 INFO L399 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:44:40,625 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:44:40,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:44:40,625 INFO L82 PathProgramCache]: Analyzing trace with hash 93409041, now seen corresponding path program 2 times [2019-09-05 11:44:40,625 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:44:40,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:44:40,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:40,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:44:40,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:44:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-05 11:44:40,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:44:40,742 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:44:40,758 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 11:44:40,775 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 11:44:40,775 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:44:40,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-05 11:44:40,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:44:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-05 11:44:40,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:44:40,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-05 11:44:40,817 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 11:44:40,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 11:44:40,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-05 11:44:40,818 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2019-09-05 11:44:41,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:44:41,081 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-09-05 11:44:41,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-05 11:44:41,082 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-09-05 11:44:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:44:41,083 INFO L225 Difference]: With dead ends: 46 [2019-09-05 11:44:41,083 INFO L226 Difference]: Without dead ends: 34 [2019-09-05 11:44:41,085 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-09-05 11:44:41,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-05 11:44:41,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2019-09-05 11:44:41,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-05 11:44:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-09-05 11:44:41,098 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 20 [2019-09-05 11:44:41,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:44:41,098 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-09-05 11:44:41,098 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 11:44:41,098 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-09-05 11:44:41,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-05 11:44:41,099 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:44:41,100 INFO L399 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:44:41,100 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:44:41,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:44:41,100 INFO L82 PathProgramCache]: Analyzing trace with hash 50981508, now seen corresponding path program 3 times [2019-09-05 11:44:41,101 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:44:41,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:44:41,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:41,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:44:41,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:44:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-09-05 11:44:41,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:44:41,246 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:44:41,269 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:44:41,302 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-05 11:44:41,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:44:41,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-05 11:44:41,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:44:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-09-05 11:44:41,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:44:41,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-05 11:44:41,343 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-05 11:44:41,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-05 11:44:41,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-05 11:44:41,343 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2019-09-05 11:44:41,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:44:41,387 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2019-09-05 11:44:41,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 11:44:41,387 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2019-09-05 11:44:41,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:44:41,388 INFO L225 Difference]: With dead ends: 51 [2019-09-05 11:44:41,388 INFO L226 Difference]: Without dead ends: 32 [2019-09-05 11:44:41,389 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-05 11:44:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-05 11:44:41,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-09-05 11:44:41,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-05 11:44:41,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-09-05 11:44:41,407 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 28 [2019-09-05 11:44:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:44:41,407 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-09-05 11:44:41,408 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-05 11:44:41,408 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-09-05 11:44:41,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-05 11:44:41,409 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:44:41,409 INFO L399 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:44:41,409 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:44:41,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:44:41,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1418818136, now seen corresponding path program 4 times [2019-09-05 11:44:41,410 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:44:41,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:44:41,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:41,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:44:41,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:44:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 53 proven. 10 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-09-05 11:44:41,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:44:41,526 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:44:41,545 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:44:41,569 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 11:44:41,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:44:41,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-05 11:44:41,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:44:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-09-05 11:44:41,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:44:41,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2019-09-05 11:44:41,702 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-05 11:44:41,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-05 11:44:41,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-09-05 11:44:41,703 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 15 states. [2019-09-05 11:44:42,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:44:42,165 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2019-09-05 11:44:42,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-05 11:44:42,167 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2019-09-05 11:44:42,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:44:42,168 INFO L225 Difference]: With dead ends: 71 [2019-09-05 11:44:42,169 INFO L226 Difference]: Without dead ends: 50 [2019-09-05 11:44:42,171 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2019-09-05 11:44:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-05 11:44:42,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2019-09-05 11:44:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-05 11:44:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-09-05 11:44:42,186 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 31 [2019-09-05 11:44:42,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:44:42,186 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-09-05 11:44:42,186 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-05 11:44:42,186 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-09-05 11:44:42,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-05 11:44:42,191 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:44:42,191 INFO L399 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:44:42,191 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:44:42,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:44:42,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1949427083, now seen corresponding path program 5 times [2019-09-05 11:44:42,193 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:44:42,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:44:42,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:42,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:44:42,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:44:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-09-05 11:44:42,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:44:42,385 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:44:42,404 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 11:44:42,455 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-05 11:44:42,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:44:42,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-05 11:44:42,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:44:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 189 proven. 15 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-09-05 11:44:42,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:44:42,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-05 11:44:42,514 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 11:44:42,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 11:44:42,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-05 11:44:42,514 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 9 states. [2019-09-05 11:44:42,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:44:42,565 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2019-09-05 11:44:42,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-05 11:44:42,567 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2019-09-05 11:44:42,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:44:42,568 INFO L225 Difference]: With dead ends: 78 [2019-09-05 11:44:42,568 INFO L226 Difference]: Without dead ends: 47 [2019-09-05 11:44:42,568 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-05 11:44:42,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-05 11:44:42,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-09-05 11:44:42,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-05 11:44:42,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-09-05 11:44:42,582 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 42 [2019-09-05 11:44:42,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:44:42,583 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-09-05 11:44:42,583 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 11:44:42,583 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-09-05 11:44:42,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-05 11:44:42,586 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:44:42,586 INFO L399 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:44:42,586 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:44:42,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:44:42,587 INFO L82 PathProgramCache]: Analyzing trace with hash -649475471, now seen corresponding path program 6 times [2019-09-05 11:44:42,587 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:44:42,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:44:42,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:42,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:44:42,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:44:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-09-05 11:44:42,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:44:42,735 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:44:42,755 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 11:44:42,897 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-09-05 11:44:42,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:44:42,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-05 11:44:42,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:44:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 254 proven. 21 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-09-05 11:44:42,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:44:42,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-05 11:44:42,934 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 11:44:42,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 11:44:42,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-09-05 11:44:42,935 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 10 states. [2019-09-05 11:44:43,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:44:43,000 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-09-05 11:44:43,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 11:44:43,001 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2019-09-05 11:44:43,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:44:43,002 INFO L225 Difference]: With dead ends: 85 [2019-09-05 11:44:43,002 INFO L226 Difference]: Without dead ends: 51 [2019-09-05 11:44:43,002 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-09-05 11:44:43,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-05 11:44:43,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-05 11:44:43,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-05 11:44:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-09-05 11:44:43,016 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 46 [2019-09-05 11:44:43,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:44:43,017 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-09-05 11:44:43,018 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 11:44:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-09-05 11:44:43,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-05 11:44:43,021 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:44:43,021 INFO L399 BasicCegarLoop]: trace histogram [28, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:44:43,022 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:44:43,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:44:43,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1892649995, now seen corresponding path program 7 times [2019-09-05 11:44:43,022 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:44:43,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:44:43,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:43,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:44:43,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:44:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-09-05 11:44:43,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:44:43,164 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:44:43,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:44:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:44:43,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-05 11:44:43,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:44:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (8)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 11:44:43,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:44:43,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2019-09-05 11:44:43,387 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-05 11:44:43,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-05 11:44:43,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2019-09-05 11:44:43,388 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 20 states. [2019-09-05 11:44:44,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:44:44,306 INFO L93 Difference]: Finished difference Result 113 states and 129 transitions. [2019-09-05 11:44:44,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-09-05 11:44:44,307 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2019-09-05 11:44:44,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:44:44,308 INFO L225 Difference]: With dead ends: 113 [2019-09-05 11:44:44,308 INFO L226 Difference]: Without dead ends: 76 [2019-09-05 11:44:44,310 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=2706, Unknown=0, NotChecked=0, Total=2970 [2019-09-05 11:44:44,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-05 11:44:44,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2019-09-05 11:44:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-05 11:44:44,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2019-09-05 11:44:44,319 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 50 [2019-09-05 11:44:44,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:44:44,320 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2019-09-05 11:44:44,320 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-05 11:44:44,320 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2019-09-05 11:44:44,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-05 11:44:44,321 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:44:44,321 INFO L399 BasicCegarLoop]: trace histogram [40, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:44:44,321 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:44:44,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:44:44,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1564944312, now seen corresponding path program 8 times [2019-09-05 11:44:44,322 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:44:44,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:44:44,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:44,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:44:44,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:44:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 329 proven. 36 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2019-09-05 11:44:44,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:44:44,490 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:44:44,507 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 11:44:44,549 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 11:44:44,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:44:44,551 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-05 11:44:44,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:44:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 0 proven. 868 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-09-05 11:44:44,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:44:44,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2019-09-05 11:44:44,751 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-05 11:44:44,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-05 11:44:44,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2019-09-05 11:44:44,752 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 23 states. [2019-09-05 11:44:46,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:44:46,153 INFO L93 Difference]: Finished difference Result 145 states and 164 transitions. [2019-09-05 11:44:46,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-09-05 11:44:46,154 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2019-09-05 11:44:46,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:44:46,155 INFO L225 Difference]: With dead ends: 145 [2019-09-05 11:44:46,156 INFO L226 Difference]: Without dead ends: 94 [2019-09-05 11:44:46,159 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=351, Invalid=4619, Unknown=0, NotChecked=0, Total=4970 [2019-09-05 11:44:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-05 11:44:46,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-09-05 11:44:46,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-05 11:44:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2019-09-05 11:44:46,170 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 65 [2019-09-05 11:44:46,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:44:46,170 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2019-09-05 11:44:46,170 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-05 11:44:46,170 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2019-09-05 11:44:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-05 11:44:46,171 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:44:46,171 INFO L399 BasicCegarLoop]: trace histogram [54, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:44:46,172 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:44:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:44:46,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1497018839, now seen corresponding path program 9 times [2019-09-05 11:44:46,172 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:44:46,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:44:46,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:46,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:44:46,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:44:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 506 proven. 45 refuted. 0 times theorem prover too weak. 1255 trivial. 0 not checked. [2019-09-05 11:44:46,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:44:46,320 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:44:46,331 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 11:44:46,939 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-05 11:44:46,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:44:46,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-05 11:44:46,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:44:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 511 proven. 45 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2019-09-05 11:44:46,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:44:46,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-05 11:44:46,989 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 11:44:46,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 11:44:46,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-05 11:44:46,989 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 13 states. [2019-09-05 11:44:47,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:44:47,080 INFO L93 Difference]: Finished difference Result 156 states and 173 transitions. [2019-09-05 11:44:47,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-05 11:44:47,084 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2019-09-05 11:44:47,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:44:47,085 INFO L225 Difference]: With dead ends: 156 [2019-09-05 11:44:47,085 INFO L226 Difference]: Without dead ends: 89 [2019-09-05 11:44:47,086 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-05 11:44:47,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-09-05 11:44:47,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-09-05 11:44:47,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-05 11:44:47,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2019-09-05 11:44:47,098 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 82 [2019-09-05 11:44:47,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:44:47,098 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2019-09-05 11:44:47,098 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 11:44:47,098 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2019-09-05 11:44:47,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-05 11:44:47,099 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:44:47,099 INFO L399 BasicCegarLoop]: trace histogram [60, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:44:47,100 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:44:47,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:44:47,100 INFO L82 PathProgramCache]: Analyzing trace with hash 642319569, now seen corresponding path program 10 times [2019-09-05 11:44:47,100 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:44:47,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:44:47,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:47,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:44:47,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:44:47,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-09-05 11:44:47,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:44:47,268 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:44:47,289 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:44:47,343 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 11:44:47,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:44:47,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-05 11:44:47,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:44:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1900 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2019-09-05 11:44:47,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:44:47,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16] total 17 [2019-09-05 11:44:47,500 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-05 11:44:47,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-05 11:44:47,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-09-05 11:44:47,501 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand 17 states. [2019-09-05 11:44:47,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:44:47,711 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2019-09-05 11:44:47,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-05 11:44:47,711 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 88 [2019-09-05 11:44:47,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:44:47,712 INFO L225 Difference]: With dead ends: 119 [2019-09-05 11:44:47,713 INFO L226 Difference]: Without dead ends: 114 [2019-09-05 11:44:47,714 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-09-05 11:44:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-09-05 11:44:47,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 102. [2019-09-05 11:44:47,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-05 11:44:47,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2019-09-05 11:44:47,735 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 88 [2019-09-05 11:44:47,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:44:47,735 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2019-09-05 11:44:47,735 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-05 11:44:47,736 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2019-09-05 11:44:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-05 11:44:47,743 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:44:47,743 INFO L399 BasicCegarLoop]: trace histogram [70, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:44:47,744 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:44:47,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:44:47,744 INFO L82 PathProgramCache]: Analyzing trace with hash -284489192, now seen corresponding path program 11 times [2019-09-05 11:44:47,744 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:44:47,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:44:47,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:47,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:44:47,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:44:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:44:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 2590 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-09-05 11:44:47,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:44:47,996 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:44:48,017 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 [2019-09-05 11:46:26,993 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2019-09-05 11:46:26,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:46:27,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-05 11:46:27,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:46:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 2642 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2019-09-05 11:46:27,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:46:27,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18] total 19 [2019-09-05 11:46:27,359 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-05 11:46:27,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-05 11:46:27,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2019-09-05 11:46:27,359 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand 19 states. [2019-09-05 11:46:27,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:46:27,694 INFO L93 Difference]: Finished difference Result 132 states and 141 transitions. [2019-09-05 11:46:27,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-05 11:46:27,695 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 101 [2019-09-05 11:46:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:46:27,696 INFO L225 Difference]: With dead ends: 132 [2019-09-05 11:46:27,696 INFO L226 Difference]: Without dead ends: 127 [2019-09-05 11:46:27,697 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2019-09-05 11:46:27,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-09-05 11:46:27,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2019-09-05 11:46:27,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-09-05 11:46:27,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 123 transitions. [2019-09-05 11:46:27,710 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 123 transitions. Word has length 101 [2019-09-05 11:46:27,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:46:27,711 INFO L475 AbstractCegarLoop]: Abstraction has 115 states and 123 transitions. [2019-09-05 11:46:27,711 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-05 11:46:27,711 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 123 transitions. [2019-09-05 11:46:27,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-09-05 11:46:27,712 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:46:27,712 INFO L399 BasicCegarLoop]: trace histogram [80, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:46:27,713 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:46:27,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:46:27,713 INFO L82 PathProgramCache]: Analyzing trace with hash -352579535, now seen corresponding path program 12 times [2019-09-05 11:46:27,713 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:46:27,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:46:27,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:46:27,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:46:27,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:46:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:46:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3892 backedges. 0 proven. 3452 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2019-09-05 11:46:27,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:46:27,915 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:46:27,940 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 [2019-09-05 11:46:31,421 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2019-09-05 11:46:31,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:46:31,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2019-09-05 11:46:31,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:46:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3892 backedges. 0 proven. 3506 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2019-09-05 11:46:31,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:46:31,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 20] total 21 [2019-09-05 11:46:31,659 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-05 11:46:31,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-05 11:46:31,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2019-09-05 11:46:31,661 INFO L87 Difference]: Start difference. First operand 115 states and 123 transitions. Second operand 21 states. [2019-09-05 11:46:32,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:46:32,012 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2019-09-05 11:46:32,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-05 11:46:32,012 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 114 [2019-09-05 11:46:32,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:46:32,014 INFO L225 Difference]: With dead ends: 145 [2019-09-05 11:46:32,014 INFO L226 Difference]: Without dead ends: 140 [2019-09-05 11:46:32,014 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2019-09-05 11:46:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-09-05 11:46:32,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2019-09-05 11:46:32,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-09-05 11:46:32,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2019-09-05 11:46:32,027 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 114 [2019-09-05 11:46:32,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:46:32,028 INFO L475 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2019-09-05 11:46:32,028 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-05 11:46:32,028 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2019-09-05 11:46:32,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-09-05 11:46:32,029 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:46:32,030 INFO L399 BasicCegarLoop]: trace histogram [90, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:46:32,030 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:46:32,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:46:32,030 INFO L82 PathProgramCache]: Analyzing trace with hash -535987528, now seen corresponding path program 13 times [2019-09-05 11:46:32,030 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:46:32,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:46:32,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:46:32,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:46:32,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:46:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:46:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 0 proven. 4437 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-09-05 11:46:32,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:46:32,276 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:46:32,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:46:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:46:32,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 42 conjunts are in the unsatisfiable core [2019-09-05 11:46:32,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:46:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4932 backedges. 0 proven. 4492 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2019-09-05 11:46:32,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:46:32,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22] total 23 [2019-09-05 11:46:32,625 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-05 11:46:32,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-05 11:46:32,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2019-09-05 11:46:32,626 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand 23 states. [2019-09-05 11:46:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:46:33,094 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2019-09-05 11:46:33,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 11:46:33,095 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 127 [2019-09-05 11:46:33,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:46:33,096 INFO L225 Difference]: With dead ends: 158 [2019-09-05 11:46:33,096 INFO L226 Difference]: Without dead ends: 153 [2019-09-05 11:46:33,097 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2019-09-05 11:46:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-09-05 11:46:33,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 141. [2019-09-05 11:46:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-09-05 11:46:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2019-09-05 11:46:33,113 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 127 [2019-09-05 11:46:33,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:46:33,114 INFO L475 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2019-09-05 11:46:33,114 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-05 11:46:33,114 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2019-09-05 11:46:33,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-09-05 11:46:33,115 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:46:33,116 INFO L399 BasicCegarLoop]: trace histogram [100, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:46:33,116 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:46:33,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:46:33,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1611506577, now seen corresponding path program 14 times [2019-09-05 11:46:33,116 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:46:33,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:46:33,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:46:33,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 11:46:33,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:46:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:46:33,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2019-09-05 11:46:33,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:46:33,410 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:46:33,422 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 11:46:33,491 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 11:46:33,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:46:33,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-05 11:46:33,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:46:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2019-09-05 11:46:33,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:46:33,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-05 11:46:33,578 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-05 11:46:33,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-05 11:46:33,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-09-05 11:46:33,579 INFO L87 Difference]: Start difference. First operand 141 states and 151 transitions. Second operand 14 states. [2019-09-05 11:46:33,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:46:33,744 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2019-09-05 11:46:33,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-05 11:46:33,744 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 140 [2019-09-05 11:46:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:46:33,746 INFO L225 Difference]: With dead ends: 171 [2019-09-05 11:46:33,746 INFO L226 Difference]: Without dead ends: 166 [2019-09-05 11:46:33,746 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-09-05 11:46:33,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-09-05 11:46:33,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 154. [2019-09-05 11:46:33,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-09-05 11:46:33,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 165 transitions. [2019-09-05 11:46:33,759 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 165 transitions. Word has length 140 [2019-09-05 11:46:33,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:46:33,760 INFO L475 AbstractCegarLoop]: Abstraction has 154 states and 165 transitions. [2019-09-05 11:46:33,760 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-05 11:46:33,760 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 165 transitions. [2019-09-05 11:46:33,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-09-05 11:46:33,762 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:46:33,762 INFO L399 BasicCegarLoop]: trace histogram [110, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:46:33,762 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:46:33,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:46:33,762 INFO L82 PathProgramCache]: Analyzing trace with hash -57777320, now seen corresponding path program 15 times [2019-09-05 11:46:33,762 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:46:33,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:46:33,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:46:33,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:46:33,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:46:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:46:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 6776 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2019-09-05 11:46:34,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:46:34,110 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:46:34,139 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:52:11,023 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2019-09-05 11:52:11,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:52:11,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-05 11:52:11,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:52:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 6776 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2019-09-05 11:52:11,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:52:11,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-05 11:52:11,202 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-05 11:52:11,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-05 11:52:11,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-05 11:52:11,202 INFO L87 Difference]: Start difference. First operand 154 states and 165 transitions. Second operand 15 states. [2019-09-05 11:52:11,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:52:11,393 INFO L93 Difference]: Finished difference Result 184 states and 197 transitions. [2019-09-05 11:52:11,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-05 11:52:11,394 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 153 [2019-09-05 11:52:11,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:52:11,395 INFO L225 Difference]: With dead ends: 184 [2019-09-05 11:52:11,395 INFO L226 Difference]: Without dead ends: 179 [2019-09-05 11:52:11,396 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-05 11:52:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-09-05 11:52:11,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 167. [2019-09-05 11:52:11,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-09-05 11:52:11,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 179 transitions. [2019-09-05 11:52:11,411 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 179 transitions. Word has length 153 [2019-09-05 11:52:11,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:52:11,411 INFO L475 AbstractCegarLoop]: Abstraction has 167 states and 179 transitions. [2019-09-05 11:52:11,411 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-05 11:52:11,411 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 179 transitions. [2019-09-05 11:52:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-09-05 11:52:11,413 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:52:11,413 INFO L399 BasicCegarLoop]: trace histogram [120, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:52:11,413 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:52:11,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:52:11,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1125925135, now seen corresponding path program 16 times [2019-09-05 11:52:11,414 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:52:11,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:52:11,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:52:11,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:52:11,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:52:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:52:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2019-09-05 11:52:11,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:52:11,789 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 11:52:11,829 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 11:52:11,911 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 11:52:11,911 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 11:52:11,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-05 11:52:11,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 11:52:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8790 backedges. 0 proven. 8130 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2019-09-05 11:52:12,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 11:52:12,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-05 11:52:12,011 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-05 11:52:12,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-05 11:52:12,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2019-09-05 11:52:12,012 INFO L87 Difference]: Start difference. First operand 167 states and 179 transitions. Second operand 16 states. [2019-09-05 11:52:12,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 11:52:12,251 INFO L93 Difference]: Finished difference Result 197 states and 211 transitions. [2019-09-05 11:52:12,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-05 11:52:12,252 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 166 [2019-09-05 11:52:12,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 11:52:12,253 INFO L225 Difference]: With dead ends: 197 [2019-09-05 11:52:12,253 INFO L226 Difference]: Without dead ends: 192 [2019-09-05 11:52:12,254 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2019-09-05 11:52:12,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-09-05 11:52:12,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 180. [2019-09-05 11:52:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-09-05 11:52:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 193 transitions. [2019-09-05 11:52:12,270 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 193 transitions. Word has length 166 [2019-09-05 11:52:12,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 11:52:12,270 INFO L475 AbstractCegarLoop]: Abstraction has 180 states and 193 transitions. [2019-09-05 11:52:12,271 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-05 11:52:12,271 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 193 transitions. [2019-09-05 11:52:12,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-09-05 11:52:12,272 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 11:52:12,273 INFO L399 BasicCegarLoop]: trace histogram [130, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 11:52:12,273 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 11:52:12,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 11:52:12,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1024998408, now seen corresponding path program 17 times [2019-09-05 11:52:12,274 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 11:52:12,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 11:52:12,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:52:12,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 11:52:12,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 11:52:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 11:52:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10322 backedges. 0 proven. 9607 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-09-05 11:52:12,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 11:52:12,713 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 11:52:12,737 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000