/usr/bin/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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/ssh-simplified/s3_clnt_3.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:49:13,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:49:13,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:49:13,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 04:49:13,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:49:13,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:49:13,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:49:13,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:49:13,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:49:13,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:49:13,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:49:13,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:49:13,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:49:13,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:49:13,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:49:13,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:49:13,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 04:49:14,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:49:14,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:49:14,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:49:14,007 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 [2019-11-07 04:49:14,029 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:49:14,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:49:14,031 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:49:14,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:49:14,032 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:49:14,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:49:14,033 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:49:14,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:49:14,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:49:14,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:49:14,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:49:14,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:49:14,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:49:14,035 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:49:14,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:49:14,036 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:49:14,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:49:14,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:49:14,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:49:14,037 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:49:14,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:49:14,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:49:14,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:49:14,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:49:14,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:49:14,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:49:14,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:49:14,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:49:14,039 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 04:49:14,330 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:49:14,350 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:49:14,354 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:49:14,356 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:49:14,356 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:49:14,357 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_clnt_3.cil-1.c [2019-11-07 04:49:14,430 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b11a5f09f/553d7b6646f54451b66d5013b0ef733c/FLAGaa549106c [2019-11-07 04:49:14,945 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:49:14,946 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_clnt_3.cil-1.c [2019-11-07 04:49:14,960 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b11a5f09f/553d7b6646f54451b66d5013b0ef733c/FLAGaa549106c [2019-11-07 04:49:15,249 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b11a5f09f/553d7b6646f54451b66d5013b0ef733c [2019-11-07 04:49:15,268 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:49:15,276 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:49:15,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:49:15,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:49:15,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:49:15,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:49:15" (1/1) ... [2019-11-07 04:49:15,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3932fec2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:49:15, skipping insertion in model container [2019-11-07 04:49:15,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:49:15" (1/1) ... [2019-11-07 04:49:15,321 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:49:15,424 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:49:15,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:49:15,756 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:49:15,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:49:15,914 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:49:15,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:49:15 WrapperNode [2019-11-07 04:49:15,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:49:15,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:49:15,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:49:15,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:49:15,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:49:15" (1/1) ... [2019-11-07 04:49:15,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:49:15" (1/1) ... [2019-11-07 04:49:15,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:49:15" (1/1) ... [2019-11-07 04:49:15,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:49:15" (1/1) ... [2019-11-07 04:49:15,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:49:15" (1/1) ... [2019-11-07 04:49:15,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:49:15" (1/1) ... [2019-11-07 04:49:15,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:49:15" (1/1) ... [2019-11-07 04:49:15,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:49:15,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:49:15,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:49:15,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:49:15,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:49:15" (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 [2019-11-07 04:49:16,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:49:16,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:49:16,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_connect [2019-11-07 04:49:16,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:49:16,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:49:16,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:49:16,033 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_connect [2019-11-07 04:49:16,033 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:49:16,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:49:16,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:49:16,167 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-07 04:49:16,685 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2019-11-07 04:49:16,686 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2019-11-07 04:49:17,072 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:49:17,073 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 04:49:17,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:49:17 BoogieIcfgContainer [2019-11-07 04:49:17,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:49:17,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:49:17,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:49:17,079 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:49:17,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:49:15" (1/3) ... [2019-11-07 04:49:17,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cabeb65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:49:17, skipping insertion in model container [2019-11-07 04:49:17,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:49:15" (2/3) ... [2019-11-07 04:49:17,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cabeb65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:49:17, skipping insertion in model container [2019-11-07 04:49:17,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:49:17" (3/3) ... [2019-11-07 04:49:17,084 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_clnt_3.cil-1.c [2019-11-07 04:49:17,095 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:49:17,107 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:49:17,119 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:49:17,145 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:49:17,145 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:49:17,145 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:49:17,146 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:49:17,146 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:49:17,146 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:49:17,146 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:49:17,147 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:49:17,168 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2019-11-07 04:49:17,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 04:49:17,175 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:49:17,176 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:49:17,178 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:49:17,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:49:17,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1522704212, now seen corresponding path program 1 times [2019-11-07 04:49:17,194 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:49:17,195 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676598698] [2019-11-07 04:49:17,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:49:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:49:17,388 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676598698] [2019-11-07 04:49:17,389 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:49:17,390 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:49:17,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462946970] [2019-11-07 04:49:17,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:49:17,397 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:49:17,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:49:17,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:49:17,414 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 3 states. [2019-11-07 04:49:17,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:49:17,485 INFO L93 Difference]: Finished difference Result 183 states and 304 transitions. [2019-11-07 04:49:17,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:49:17,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-07 04:49:17,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:49:17,501 INFO L225 Difference]: With dead ends: 183 [2019-11-07 04:49:17,501 INFO L226 Difference]: Without dead ends: 164 [2019-11-07 04:49:17,505 INFO L630 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 [2019-11-07 04:49:17,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-07 04:49:17,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2019-11-07 04:49:17,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-11-07 04:49:17,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 237 transitions. [2019-11-07 04:49:17,561 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 237 transitions. Word has length 25 [2019-11-07 04:49:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:49:17,562 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 237 transitions. [2019-11-07 04:49:17,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:49:17,562 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 237 transitions. [2019-11-07 04:49:17,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-07 04:49:17,565 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:49:17,565 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:49:17,565 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:49:17,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:49:17,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1740798676, now seen corresponding path program 1 times [2019-11-07 04:49:17,566 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:49:17,566 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323994180] [2019-11-07 04:49:17,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:49:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:49:17,631 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323994180] [2019-11-07 04:49:17,632 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:49:17,632 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:49:17,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453203407] [2019-11-07 04:49:17,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:49:17,634 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:49:17,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:49:17,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:49:17,635 INFO L87 Difference]: Start difference. First operand 163 states and 237 transitions. Second operand 3 states. [2019-11-07 04:49:17,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:49:17,877 INFO L93 Difference]: Finished difference Result 262 states and 384 transitions. [2019-11-07 04:49:17,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:49:17,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2019-11-07 04:49:17,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:49:17,889 INFO L225 Difference]: With dead ends: 262 [2019-11-07 04:49:17,889 INFO L226 Difference]: Without dead ends: 182 [2019-11-07 04:49:17,893 INFO L630 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 [2019-11-07 04:49:17,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-11-07 04:49:17,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2019-11-07 04:49:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-11-07 04:49:17,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 255 transitions. [2019-11-07 04:49:17,929 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 255 transitions. Word has length 36 [2019-11-07 04:49:17,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:49:17,929 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 255 transitions. [2019-11-07 04:49:17,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:49:17,930 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 255 transitions. [2019-11-07 04:49:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-07 04:49:17,932 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:49:17,932 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:49:17,933 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:49:17,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:49:17,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1204839858, now seen corresponding path program 1 times [2019-11-07 04:49:17,933 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:49:17,933 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805779555] [2019-11-07 04:49:17,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:49:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:49:18,097 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805779555] [2019-11-07 04:49:18,098 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46920349] [2019-11-07 04:49:18,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:49:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:18,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:49:18,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:49:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 04:49:18,260 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:49:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 04:49:18,312 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:49:18,312 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 9 [2019-11-07 04:49:18,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736482461] [2019-11-07 04:49:18,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 04:49:18,315 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:49:18,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 04:49:18,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-07 04:49:18,316 INFO L87 Difference]: Start difference. First operand 178 states and 255 transitions. Second operand 6 states. [2019-11-07 04:49:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:49:18,776 INFO L93 Difference]: Finished difference Result 533 states and 825 transitions. [2019-11-07 04:49:18,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:49:18,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2019-11-07 04:49:18,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:49:18,787 INFO L225 Difference]: With dead ends: 533 [2019-11-07 04:49:18,788 INFO L226 Difference]: Without dead ends: 360 [2019-11-07 04:49:18,790 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-07 04:49:18,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2019-11-07 04:49:18,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 328. [2019-11-07 04:49:18,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2019-11-07 04:49:18,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 457 transitions. [2019-11-07 04:49:18,848 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 457 transitions. Word has length 49 [2019-11-07 04:49:18,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:49:18,849 INFO L462 AbstractCegarLoop]: Abstraction has 328 states and 457 transitions. [2019-11-07 04:49:18,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 04:49:18,849 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 457 transitions. [2019-11-07 04:49:18,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-07 04:49:18,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:49:18,853 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:49:19,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:49:19,057 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:49:19,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:49:19,057 INFO L82 PathProgramCache]: Analyzing trace with hash 156741548, now seen corresponding path program 1 times [2019-11-07 04:49:19,058 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:49:19,058 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973814624] [2019-11-07 04:49:19,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:49:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-07 04:49:19,200 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973814624] [2019-11-07 04:49:19,202 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:49:19,202 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:49:19,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400164487] [2019-11-07 04:49:19,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:49:19,203 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:49:19,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:49:19,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:49:19,204 INFO L87 Difference]: Start difference. First operand 328 states and 457 transitions. Second operand 3 states. [2019-11-07 04:49:19,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:49:19,346 INFO L93 Difference]: Finished difference Result 691 states and 979 transitions. [2019-11-07 04:49:19,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:49:19,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2019-11-07 04:49:19,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:49:19,350 INFO L225 Difference]: With dead ends: 691 [2019-11-07 04:49:19,350 INFO L226 Difference]: Without dead ends: 370 [2019-11-07 04:49:19,352 INFO L630 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 [2019-11-07 04:49:19,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2019-11-07 04:49:19,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 366. [2019-11-07 04:49:19,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2019-11-07 04:49:19,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 501 transitions. [2019-11-07 04:49:19,370 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 501 transitions. Word has length 64 [2019-11-07 04:49:19,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:49:19,370 INFO L462 AbstractCegarLoop]: Abstraction has 366 states and 501 transitions. [2019-11-07 04:49:19,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:49:19,371 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 501 transitions. [2019-11-07 04:49:19,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-07 04:49:19,374 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:49:19,374 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:49:19,375 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:49:19,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:49:19,375 INFO L82 PathProgramCache]: Analyzing trace with hash -897873071, now seen corresponding path program 1 times [2019-11-07 04:49:19,375 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:49:19,376 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100406608] [2019-11-07 04:49:19,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:49:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-07 04:49:19,482 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100406608] [2019-11-07 04:49:19,482 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123617132] [2019-11-07 04:49:19,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:49:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:19,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 04:49:19,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:49:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-11-07 04:49:19,581 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:49:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-11-07 04:49:19,629 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:49:19,629 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 12 [2019-11-07 04:49:19,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726503465] [2019-11-07 04:49:19,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 04:49:19,632 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:49:19,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 04:49:19,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:49:19,633 INFO L87 Difference]: Start difference. First operand 366 states and 501 transitions. Second operand 8 states. [2019-11-07 04:49:20,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:49:20,044 INFO L93 Difference]: Finished difference Result 852 states and 1223 transitions. [2019-11-07 04:49:20,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 04:49:20,044 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 82 [2019-11-07 04:49:20,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:49:20,047 INFO L225 Difference]: With dead ends: 852 [2019-11-07 04:49:20,048 INFO L226 Difference]: Without dead ends: 463 [2019-11-07 04:49:20,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-11-07 04:49:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2019-11-07 04:49:20,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 413. [2019-11-07 04:49:20,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2019-11-07 04:49:20,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 578 transitions. [2019-11-07 04:49:20,067 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 578 transitions. Word has length 82 [2019-11-07 04:49:20,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:49:20,067 INFO L462 AbstractCegarLoop]: Abstraction has 413 states and 578 transitions. [2019-11-07 04:49:20,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 04:49:20,067 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 578 transitions. [2019-11-07 04:49:20,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-07 04:49:20,070 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:49:20,071 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:49:20,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:49:20,274 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:49:20,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:49:20,274 INFO L82 PathProgramCache]: Analyzing trace with hash -955926321, now seen corresponding path program 1 times [2019-11-07 04:49:20,275 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:49:20,275 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414314956] [2019-11-07 04:49:20,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:49:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 04:49:20,409 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414314956] [2019-11-07 04:49:20,409 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510613467] [2019-11-07 04:49:20,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:49:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:20,487 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 04:49:20,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:49:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-07 04:49:20,519 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:49:20,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:49:20,607 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-07 04:49:20,607 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [947966882] [2019-11-07 04:49:20,634 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2019-11-07 04:49:20,635 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:49:20,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:49:20,648 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:49:20,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:49:20,693 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-11-07 04:49:20,700 INFO L197 IcfgInterpreter]: Interpreting procedure ssl3_connect with input of size 3 for LOIs [2019-11-07 04:49:23,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-11-07 04:49:23,015 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:49:23,216 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 63 [2019-11-07 04:49:23,492 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2019-11-07 04:49:23,712 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2019-11-07 04:49:23,886 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-11-07 04:49:24,185 WARN L191 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2019-11-07 04:49:24,518 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2019-11-07 04:49:24,925 WARN L191 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2019-11-07 04:49:25,159 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2019-11-07 04:49:25,427 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2019-11-07 04:49:25,648 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2019-11-07 04:49:26,047 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2019-11-07 04:49:26,294 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2019-11-07 04:49:26,690 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2019-11-07 04:49:26,933 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2019-11-07 04:49:27,204 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2019-11-07 04:49:27,672 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2019-11-07 04:49:27,991 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2019-11-07 04:49:28,258 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2019-11-07 04:49:28,536 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2019-11-07 04:49:29,016 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2019-11-07 04:49:29,358 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2019-11-07 04:49:29,637 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2019-11-07 04:49:29,915 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2019-11-07 04:49:30,182 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2019-11-07 04:49:30,647 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2019-11-07 04:49:30,980 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2019-11-07 04:49:31,294 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 62 [2019-11-07 04:49:31,581 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 62 [2019-11-07 04:49:31,583 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 04:49:31,584 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4, 31] total 39 [2019-11-07 04:49:31,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316710081] [2019-11-07 04:49:31,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-07 04:49:31,585 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:49:31,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-07 04:49:31,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2019-11-07 04:49:31,586 INFO L87 Difference]: Start difference. First operand 413 states and 578 transitions. Second operand 39 states. [2019-11-07 04:49:31,847 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2019-11-07 04:49:32,090 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2019-11-07 04:49:32,256 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2019-11-07 04:49:32,519 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2019-11-07 04:49:32,759 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2019-11-07 04:49:33,081 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2019-11-07 04:49:33,497 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2019-11-07 04:49:33,721 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2019-11-07 04:49:33,939 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2019-11-07 04:49:34,226 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2019-11-07 04:49:34,687 WARN L191 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2019-11-07 04:49:35,349 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2019-11-07 04:49:35,716 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2019-11-07 04:49:36,084 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2019-11-07 04:49:36,550 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2019-11-07 04:49:37,113 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2019-11-07 04:49:37,843 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2019-11-07 04:49:38,157 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2019-11-07 04:49:38,459 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2019-11-07 04:49:38,872 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2019-11-07 04:49:39,177 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2019-11-07 04:49:39,518 WARN L191 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 86 [2019-11-07 04:49:39,920 WARN L191 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 89 [2019-11-07 04:49:40,148 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2019-11-07 04:49:40,492 WARN L191 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2019-11-07 04:49:40,769 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2019-11-07 04:49:41,076 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2019-11-07 04:49:41,410 WARN L191 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2019-11-07 04:49:41,655 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2019-11-07 04:49:41,911 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2019-11-07 04:49:42,238 WARN L191 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2019-11-07 04:49:42,606 WARN L191 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 91 [2019-11-07 04:49:42,835 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2019-11-07 04:49:43,295 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2019-11-07 04:49:43,600 WARN L191 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2019-11-07 04:49:43,964 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2019-11-07 04:49:44,244 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2019-11-07 04:49:44,505 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2019-11-07 04:49:44,710 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2019-11-07 04:49:45,007 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2019-11-07 04:49:45,226 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2019-11-07 04:49:45,597 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2019-11-07 04:49:45,910 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2019-11-07 04:49:46,122 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2019-11-07 04:49:46,362 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2019-11-07 04:49:46,716 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2019-11-07 04:49:46,916 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2019-11-07 04:49:47,141 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2019-11-07 04:49:47,475 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2019-11-07 04:49:47,853 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2019-11-07 04:49:48,818 WARN L191 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 95 [2019-11-07 04:49:49,201 WARN L191 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 91 [2019-11-07 04:49:50,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:49:50,286 INFO L93 Difference]: Finished difference Result 1710 states and 2396 transitions. [2019-11-07 04:49:50,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-11-07 04:49:50,286 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 91 [2019-11-07 04:49:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:49:50,297 INFO L225 Difference]: With dead ends: 1710 [2019-11-07 04:49:50,297 INFO L226 Difference]: Without dead ends: 1304 [2019-11-07 04:49:50,302 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 222 SyntacticMatches, 19 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3064 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=1647, Invalid=7665, Unknown=0, NotChecked=0, Total=9312 [2019-11-07 04:49:50,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2019-11-07 04:49:50,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 916. [2019-11-07 04:49:50,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 916 states. [2019-11-07 04:49:50,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1270 transitions. [2019-11-07 04:49:50,340 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1270 transitions. Word has length 91 [2019-11-07 04:49:50,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:49:50,340 INFO L462 AbstractCegarLoop]: Abstraction has 916 states and 1270 transitions. [2019-11-07 04:49:50,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-07 04:49:50,340 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1270 transitions. [2019-11-07 04:49:50,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-07 04:49:50,348 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:49:50,349 INFO L410 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:49:50,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:49:50,553 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:49:50,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:49:50,553 INFO L82 PathProgramCache]: Analyzing trace with hash 912340631, now seen corresponding path program 1 times [2019-11-07 04:49:50,553 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:49:50,553 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759331623] [2019-11-07 04:49:50,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:49:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 232 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-07 04:49:50,712 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759331623] [2019-11-07 04:49:50,713 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:49:50,713 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:49:50,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728336188] [2019-11-07 04:49:50,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:49:50,714 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:49:50,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:49:50,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:49:50,715 INFO L87 Difference]: Start difference. First operand 916 states and 1270 transitions. Second operand 3 states. [2019-11-07 04:49:50,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:49:50,880 INFO L93 Difference]: Finished difference Result 1704 states and 2384 transitions. [2019-11-07 04:49:50,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:49:50,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2019-11-07 04:49:50,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:49:50,888 INFO L225 Difference]: With dead ends: 1704 [2019-11-07 04:49:50,888 INFO L226 Difference]: Without dead ends: 945 [2019-11-07 04:49:50,893 INFO L630 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 [2019-11-07 04:49:50,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2019-11-07 04:49:50,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 916. [2019-11-07 04:49:50,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 916 states. [2019-11-07 04:49:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1242 transitions. [2019-11-07 04:49:50,932 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1242 transitions. Word has length 138 [2019-11-07 04:49:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:49:50,933 INFO L462 AbstractCegarLoop]: Abstraction has 916 states and 1242 transitions. [2019-11-07 04:49:50,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:49:50,934 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1242 transitions. [2019-11-07 04:49:50,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 04:49:50,937 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:49:50,937 INFO L410 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 8, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:49:50,937 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:49:50,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:49:50,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1428916413, now seen corresponding path program 2 times [2019-11-07 04:49:50,938 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:49:50,938 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905267132] [2019-11-07 04:49:50,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:49:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-07 04:49:51,006 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905267132] [2019-11-07 04:49:51,007 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:49:51,007 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:49:51,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657536241] [2019-11-07 04:49:51,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:49:51,008 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:49:51,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:49:51,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:49:51,009 INFO L87 Difference]: Start difference. First operand 916 states and 1242 transitions. Second operand 3 states. [2019-11-07 04:49:51,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:49:51,162 INFO L93 Difference]: Finished difference Result 1940 states and 2764 transitions. [2019-11-07 04:49:51,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:49:51,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2019-11-07 04:49:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:49:51,171 INFO L225 Difference]: With dead ends: 1940 [2019-11-07 04:49:51,171 INFO L226 Difference]: Without dead ends: 1113 [2019-11-07 04:49:51,172 INFO L630 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 [2019-11-07 04:49:51,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2019-11-07 04:49:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1068. [2019-11-07 04:49:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2019-11-07 04:49:51,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1434 transitions. [2019-11-07 04:49:51,206 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1434 transitions. Word has length 147 [2019-11-07 04:49:51,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:49:51,206 INFO L462 AbstractCegarLoop]: Abstraction has 1068 states and 1434 transitions. [2019-11-07 04:49:51,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:49:51,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1434 transitions. [2019-11-07 04:49:51,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-07 04:49:51,209 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:49:51,210 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 9, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:49:51,210 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:49:51,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:49:51,210 INFO L82 PathProgramCache]: Analyzing trace with hash -932622254, now seen corresponding path program 1 times [2019-11-07 04:49:51,210 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:49:51,211 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7030289] [2019-11-07 04:49:51,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:49:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 300 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2019-11-07 04:49:51,260 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7030289] [2019-11-07 04:49:51,260 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:49:51,260 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:49:51,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119194989] [2019-11-07 04:49:51,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:49:51,262 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:49:51,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:49:51,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:49:51,266 INFO L87 Difference]: Start difference. First operand 1068 states and 1434 transitions. Second operand 3 states. [2019-11-07 04:49:51,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:49:51,406 INFO L93 Difference]: Finished difference Result 2134 states and 2904 transitions. [2019-11-07 04:49:51,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:49:51,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 167 [2019-11-07 04:49:51,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:49:51,412 INFO L225 Difference]: With dead ends: 2134 [2019-11-07 04:49:51,412 INFO L226 Difference]: Without dead ends: 1164 [2019-11-07 04:49:51,414 INFO L630 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 [2019-11-07 04:49:51,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2019-11-07 04:49:51,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1104. [2019-11-07 04:49:51,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1104 states. [2019-11-07 04:49:51,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1466 transitions. [2019-11-07 04:49:51,448 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1466 transitions. Word has length 167 [2019-11-07 04:49:51,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:49:51,449 INFO L462 AbstractCegarLoop]: Abstraction has 1104 states and 1466 transitions. [2019-11-07 04:49:51,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:49:51,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1466 transitions. [2019-11-07 04:49:51,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-11-07 04:49:51,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:49:51,452 INFO L410 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:49:51,452 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:49:51,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:49:51,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1702848992, now seen corresponding path program 1 times [2019-11-07 04:49:51,453 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:49:51,453 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346759718] [2019-11-07 04:49:51,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:49:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2019-11-07 04:49:51,511 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346759718] [2019-11-07 04:49:51,511 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:49:51,511 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:49:51,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525299682] [2019-11-07 04:49:51,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:49:51,513 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:49:51,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:49:51,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:49:51,514 INFO L87 Difference]: Start difference. First operand 1104 states and 1466 transitions. Second operand 3 states. [2019-11-07 04:49:51,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:49:51,675 INFO L93 Difference]: Finished difference Result 2276 states and 3076 transitions. [2019-11-07 04:49:51,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:49:51,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 188 [2019-11-07 04:49:51,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:49:51,681 INFO L225 Difference]: With dead ends: 2276 [2019-11-07 04:49:51,681 INFO L226 Difference]: Without dead ends: 1260 [2019-11-07 04:49:51,683 INFO L630 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 [2019-11-07 04:49:51,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2019-11-07 04:49:51,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1220. [2019-11-07 04:49:51,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1220 states. [2019-11-07 04:49:51,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1622 transitions. [2019-11-07 04:49:51,718 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1622 transitions. Word has length 188 [2019-11-07 04:49:51,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:49:51,719 INFO L462 AbstractCegarLoop]: Abstraction has 1220 states and 1622 transitions. [2019-11-07 04:49:51,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:49:51,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1622 transitions. [2019-11-07 04:49:51,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-11-07 04:49:51,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:49:51,723 INFO L410 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 11, 11, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:49:51,723 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:49:51,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:49:51,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1744379648, now seen corresponding path program 1 times [2019-11-07 04:49:51,724 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:49:51,724 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104473192] [2019-11-07 04:49:51,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:49:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 412 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2019-11-07 04:49:51,787 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104473192] [2019-11-07 04:49:51,787 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:49:51,787 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:49:51,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643013354] [2019-11-07 04:49:51,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:49:51,788 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:49:51,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:49:51,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:49:51,789 INFO L87 Difference]: Start difference. First operand 1220 states and 1622 transitions. Second operand 3 states. [2019-11-07 04:49:51,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:49:51,908 INFO L93 Difference]: Finished difference Result 2088 states and 2800 transitions. [2019-11-07 04:49:51,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:49:51,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 215 [2019-11-07 04:49:51,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:49:51,913 INFO L225 Difference]: With dead ends: 2088 [2019-11-07 04:49:51,914 INFO L226 Difference]: Without dead ends: 992 [2019-11-07 04:49:51,916 INFO L630 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 [2019-11-07 04:49:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2019-11-07 04:49:51,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 958. [2019-11-07 04:49:51,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 958 states. [2019-11-07 04:49:51,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1268 transitions. [2019-11-07 04:49:51,946 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1268 transitions. Word has length 215 [2019-11-07 04:49:51,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:49:51,947 INFO L462 AbstractCegarLoop]: Abstraction has 958 states and 1268 transitions. [2019-11-07 04:49:51,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:49:51,947 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1268 transitions. [2019-11-07 04:49:51,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-11-07 04:49:51,951 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:49:51,952 INFO L410 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 12, 12, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:49:51,952 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:49:51,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:49:51,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1413224678, now seen corresponding path program 2 times [2019-11-07 04:49:51,952 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:49:51,953 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995579743] [2019-11-07 04:49:51,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:49:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 537 proven. 0 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2019-11-07 04:49:52,147 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995579743] [2019-11-07 04:49:52,147 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:49:52,147 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:49:52,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322858323] [2019-11-07 04:49:52,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:49:52,148 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:49:52,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:49:52,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:49:52,148 INFO L87 Difference]: Start difference. First operand 958 states and 1268 transitions. Second operand 3 states. [2019-11-07 04:49:52,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:49:52,188 INFO L93 Difference]: Finished difference Result 1482 states and 1983 transitions. [2019-11-07 04:49:52,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:49:52,188 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 226 [2019-11-07 04:49:52,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:49:52,193 INFO L225 Difference]: With dead ends: 1482 [2019-11-07 04:49:52,193 INFO L226 Difference]: Without dead ends: 958 [2019-11-07 04:49:52,195 INFO L630 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 [2019-11-07 04:49:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2019-11-07 04:49:52,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 958. [2019-11-07 04:49:52,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 958 states. [2019-11-07 04:49:52,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1266 transitions. [2019-11-07 04:49:52,230 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1266 transitions. Word has length 226 [2019-11-07 04:49:52,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:49:52,231 INFO L462 AbstractCegarLoop]: Abstraction has 958 states and 1266 transitions. [2019-11-07 04:49:52,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:49:52,231 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1266 transitions. [2019-11-07 04:49:52,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-11-07 04:49:52,237 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:49:52,237 INFO L410 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 12, 12, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:49:52,237 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:49:52,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:49:52,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1839010897, now seen corresponding path program 1 times [2019-11-07 04:49:52,238 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:49:52,238 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307653474] [2019-11-07 04:49:52,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:49:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 492 proven. 0 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2019-11-07 04:49:52,315 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307653474] [2019-11-07 04:49:52,316 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:49:52,316 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:49:52,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032108011] [2019-11-07 04:49:52,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:49:52,319 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:49:52,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:49:52,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:49:52,320 INFO L87 Difference]: Start difference. First operand 958 states and 1266 transitions. Second operand 3 states. [2019-11-07 04:49:52,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:49:52,482 INFO L93 Difference]: Finished difference Result 2043 states and 2813 transitions. [2019-11-07 04:49:52,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:49:52,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 227 [2019-11-07 04:49:52,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:49:52,488 INFO L225 Difference]: With dead ends: 2043 [2019-11-07 04:49:52,488 INFO L226 Difference]: Without dead ends: 1194 [2019-11-07 04:49:52,489 INFO L630 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 [2019-11-07 04:49:52,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2019-11-07 04:49:52,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1156. [2019-11-07 04:49:52,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1156 states. [2019-11-07 04:49:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1584 transitions. [2019-11-07 04:49:52,526 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1584 transitions. Word has length 227 [2019-11-07 04:49:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:49:52,527 INFO L462 AbstractCegarLoop]: Abstraction has 1156 states and 1584 transitions. [2019-11-07 04:49:52,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:49:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1584 transitions. [2019-11-07 04:49:52,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2019-11-07 04:49:52,531 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:49:52,531 INFO L410 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 13, 13, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:49:52,531 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:49:52,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:49:52,532 INFO L82 PathProgramCache]: Analyzing trace with hash -479848904, now seen corresponding path program 1 times [2019-11-07 04:49:52,532 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:49:52,532 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703715000] [2019-11-07 04:49:52,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:49:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 561 proven. 0 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2019-11-07 04:49:52,615 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703715000] [2019-11-07 04:49:52,615 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:49:52,615 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:49:52,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192085243] [2019-11-07 04:49:52,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:49:52,618 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:49:52,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:49:52,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:49:52,618 INFO L87 Difference]: Start difference. First operand 1156 states and 1584 transitions. Second operand 3 states. [2019-11-07 04:49:52,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:49:52,844 INFO L93 Difference]: Finished difference Result 2211 states and 3053 transitions. [2019-11-07 04:49:52,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:49:52,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 260 [2019-11-07 04:49:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:49:52,850 INFO L225 Difference]: With dead ends: 2211 [2019-11-07 04:49:52,851 INFO L226 Difference]: Without dead ends: 1170 [2019-11-07 04:49:52,854 INFO L630 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 [2019-11-07 04:49:52,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2019-11-07 04:49:52,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1147. [2019-11-07 04:49:52,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1147 states. [2019-11-07 04:49:52,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1557 transitions. [2019-11-07 04:49:52,917 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1557 transitions. Word has length 260 [2019-11-07 04:49:52,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:49:52,918 INFO L462 AbstractCegarLoop]: Abstraction has 1147 states and 1557 transitions. [2019-11-07 04:49:52,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:49:52,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1557 transitions. [2019-11-07 04:49:52,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-11-07 04:49:52,927 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:49:52,928 INFO L410 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 12, 12, 10, 10, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:49:52,928 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:49:52,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:49:52,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1123638286, now seen corresponding path program 1 times [2019-11-07 04:49:52,929 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:49:52,929 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005723837] [2019-11-07 04:49:52,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:49:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 681 proven. 66 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2019-11-07 04:49:53,142 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005723837] [2019-11-07 04:49:53,142 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385017948] [2019-11-07 04:49:53,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:49:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:53,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 04:49:53,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:49:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 592 proven. 155 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2019-11-07 04:49:53,392 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:49:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 515 proven. 0 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2019-11-07 04:49:53,452 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:49:53,452 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 8 [2019-11-07 04:49:53,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257760168] [2019-11-07 04:49:53,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:49:53,454 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:49:53,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:49:53,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:49:53,454 INFO L87 Difference]: Start difference. First operand 1147 states and 1557 transitions. Second operand 3 states. [2019-11-07 04:49:53,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:49:53,568 INFO L93 Difference]: Finished difference Result 2174 states and 2978 transitions. [2019-11-07 04:49:53,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:49:53,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 273 [2019-11-07 04:49:53,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:49:53,573 INFO L225 Difference]: With dead ends: 2174 [2019-11-07 04:49:53,573 INFO L226 Difference]: Without dead ends: 1151 [2019-11-07 04:49:53,575 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:49:53,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2019-11-07 04:49:53,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1147. [2019-11-07 04:49:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1147 states. [2019-11-07 04:49:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1551 transitions. [2019-11-07 04:49:53,634 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1551 transitions. Word has length 273 [2019-11-07 04:49:53,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:49:53,635 INFO L462 AbstractCegarLoop]: Abstraction has 1147 states and 1551 transitions. [2019-11-07 04:49:53,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:49:53,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1551 transitions. [2019-11-07 04:49:53,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2019-11-07 04:49:53,639 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:49:53,640 INFO L410 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 12, 12, 11, 10, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:49:53,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:49:53,850 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:49:53,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:49:53,850 INFO L82 PathProgramCache]: Analyzing trace with hash -354740392, now seen corresponding path program 1 times [2019-11-07 04:49:53,851 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:49:53,851 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78933442] [2019-11-07 04:49:53,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:49:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 685 proven. 72 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2019-11-07 04:49:53,985 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78933442] [2019-11-07 04:49:53,986 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247274148] [2019-11-07 04:49:53,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:49:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:54,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 04:49:54,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:49:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 595 proven. 162 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2019-11-07 04:49:54,212 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:49:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1090 backedges. 525 proven. 0 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2019-11-07 04:49:54,251 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:49:54,252 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 8 [2019-11-07 04:49:54,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036400080] [2019-11-07 04:49:54,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:49:54,252 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:49:54,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:49:54,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:49:54,253 INFO L87 Difference]: Start difference. First operand 1147 states and 1551 transitions. Second operand 3 states. [2019-11-07 04:49:54,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:49:54,394 INFO L93 Difference]: Finished difference Result 2174 states and 2966 transitions. [2019-11-07 04:49:54,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:49:54,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 274 [2019-11-07 04:49:54,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:49:54,401 INFO L225 Difference]: With dead ends: 2174 [2019-11-07 04:49:54,401 INFO L226 Difference]: Without dead ends: 1151 [2019-11-07 04:49:54,404 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:49:54,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2019-11-07 04:49:54,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1147. [2019-11-07 04:49:54,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1147 states. [2019-11-07 04:49:54,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1545 transitions. [2019-11-07 04:49:54,438 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1545 transitions. Word has length 274 [2019-11-07 04:49:54,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:49:54,439 INFO L462 AbstractCegarLoop]: Abstraction has 1147 states and 1545 transitions. [2019-11-07 04:49:54,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:49:54,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1545 transitions. [2019-11-07 04:49:54,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2019-11-07 04:49:54,442 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:49:54,442 INFO L410 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 12, 12, 10, 10, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:49:54,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:49:54,647 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:49:54,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:49:54,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1587024730, now seen corresponding path program 2 times [2019-11-07 04:49:54,648 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:49:54,648 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634335539] [2019-11-07 04:49:54,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:49:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 781 proven. 54 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2019-11-07 04:49:54,841 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634335539] [2019-11-07 04:49:54,841 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039657595] [2019-11-07 04:49:54,841 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:49:54,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-07 04:49:54,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 04:49:54,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 04:49:54,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:49:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 603 proven. 0 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2019-11-07 04:49:55,058 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:49:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 603 proven. 0 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2019-11-07 04:49:55,141 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:49:55,141 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2019-11-07 04:49:55,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084531020] [2019-11-07 04:49:55,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:49:55,144 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:49:55,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:49:55,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:49:55,145 INFO L87 Difference]: Start difference. First operand 1147 states and 1545 transitions. Second operand 4 states. [2019-11-07 04:49:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:49:55,311 INFO L93 Difference]: Finished difference Result 2202 states and 2984 transitions. [2019-11-07 04:49:55,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:49:55,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 284 [2019-11-07 04:49:55,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:49:55,317 INFO L225 Difference]: With dead ends: 2202 [2019-11-07 04:49:55,318 INFO L226 Difference]: Without dead ends: 1179 [2019-11-07 04:49:55,320 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:49:55,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2019-11-07 04:49:55,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1147. [2019-11-07 04:49:55,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1147 states. [2019-11-07 04:49:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1518 transitions. [2019-11-07 04:49:55,358 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1518 transitions. Word has length 284 [2019-11-07 04:49:55,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:49:55,359 INFO L462 AbstractCegarLoop]: Abstraction has 1147 states and 1518 transitions. [2019-11-07 04:49:55,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:49:55,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1518 transitions. [2019-11-07 04:49:55,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2019-11-07 04:49:55,362 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:49:55,362 INFO L410 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 13, 13, 11, 11, 9, 9, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:49:55,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:49:55,568 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:49:55,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:49:55,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1293439746, now seen corresponding path program 1 times [2019-11-07 04:49:55,568 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:49:55,568 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162070672] [2019-11-07 04:49:55,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:49:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1307 backedges. 748 proven. 226 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2019-11-07 04:49:55,775 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162070672] [2019-11-07 04:49:55,775 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813044830] [2019-11-07 04:49:55,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:49:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:49:55,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-07 04:49:55,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:49:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1307 backedges. 731 proven. 11 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2019-11-07 04:49:55,977 INFO L321 TraceCheckSpWp]: Computing backward predicates...