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_srvr_6.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:31:18,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:31:18,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:31:18,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:31:18,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:31:18,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:31:18,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:31:18,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:31:18,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:31:18,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:31:18,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:31:18,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:31:18,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:31:18,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:31:18,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:31:18,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:31:18,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:31:18,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:31:18,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:31:18,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:31:18,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:31:18,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:31:18,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:31:18,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:31:18,716 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:31:18,721 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:31:18,722 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:31:18,722 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:31:18,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:31:18,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:31:18,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:31:18,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:31:18,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:31:18,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:31:18,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:31:18,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:31:18,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:31:18,752 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:31:18,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:31:18,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:31:18,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:31:18,755 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:31:18,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:31:18,756 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:31:18,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:31:18,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:31:18,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:31:18,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:31:18,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:31:18,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:31:18,758 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:31:18,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:31:18,759 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:31:18,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:31:18,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:31:18,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:31:18,760 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:31:18,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:31:18,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:31:18,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:31:18,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:31:18,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:31:18,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:31:18,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:31:18,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:31:18,761 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 [2019-10-15 03:31:19,040 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:31:19,060 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:31:19,064 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:31:19,065 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:31:19,066 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:31:19,066 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_6.cil-2.c [2019-10-15 03:31:19,137 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aad9adf19/3fc5f0f856e741a2a7af83710002ba4d/FLAG38b496cf5 [2019-10-15 03:31:19,628 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:31:19,629 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_6.cil-2.c [2019-10-15 03:31:19,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aad9adf19/3fc5f0f856e741a2a7af83710002ba4d/FLAG38b496cf5 [2019-10-15 03:31:19,969 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aad9adf19/3fc5f0f856e741a2a7af83710002ba4d [2019-10-15 03:31:19,979 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:31:19,981 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:31:19,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:31:19,982 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:31:19,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:31:19,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:31:19" (1/1) ... [2019-10-15 03:31:19,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a632ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:19, skipping insertion in model container [2019-10-15 03:31:19,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:31:19" (1/1) ... [2019-10-15 03:31:19,997 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:31:20,047 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:31:20,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:31:20,295 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:31:20,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:31:20,503 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:31:20,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:20 WrapperNode [2019-10-15 03:31:20,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:31:20,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:31:20,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:31:20,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:31:20,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:20" (1/1) ... [2019-10-15 03:31:20,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:20" (1/1) ... [2019-10-15 03:31:20,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:20" (1/1) ... [2019-10-15 03:31:20,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:20" (1/1) ... [2019-10-15 03:31:20,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:20" (1/1) ... [2019-10-15 03:31:20,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:20" (1/1) ... [2019-10-15 03:31:20,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:20" (1/1) ... [2019-10-15 03:31:20,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:31:20,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:31:20,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:31:20,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:31:20,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:31:20,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:31:20,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:31:20,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2019-10-15 03:31:20,632 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:31:20,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:31:20,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-15 03:31:20,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:31:20,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-15 03:31:20,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-15 03:31:20,633 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2019-10-15 03:31:20,633 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:31:20,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:31:20,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:31:20,846 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-15 03:31:21,527 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2019-10-15 03:31:21,528 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2019-10-15 03:31:21,952 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:31:21,952 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 03:31:21,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:31:21 BoogieIcfgContainer [2019-10-15 03:31:21,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:31:21,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:31:21,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:31:21,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:31:21,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:31:19" (1/3) ... [2019-10-15 03:31:21,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d15472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:31:21, skipping insertion in model container [2019-10-15 03:31:21,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:31:20" (2/3) ... [2019-10-15 03:31:21,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55d15472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:31:21, skipping insertion in model container [2019-10-15 03:31:21,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:31:21" (3/3) ... [2019-10-15 03:31:21,962 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_6.cil-2.c [2019-10-15 03:31:21,972 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:31:21,982 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:31:21,994 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:31:22,020 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:31:22,020 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:31:22,021 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:31:22,021 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:31:22,021 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:31:22,021 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:31:22,021 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:31:22,021 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:31:22,042 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states. [2019-10-15 03:31:22,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-15 03:31:22,052 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:22,053 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:22,055 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:22,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:22,062 INFO L82 PathProgramCache]: Analyzing trace with hash 882887444, now seen corresponding path program 1 times [2019-10-15 03:31:22,071 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:22,072 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398069091] [2019-10-15 03:31:22,072 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:22,072 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:22,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:31:22,352 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398069091] [2019-10-15 03:31:22,353 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:22,354 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:22,354 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965665519] [2019-10-15 03:31:22,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:22,360 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:22,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:22,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:22,377 INFO L87 Difference]: Start difference. First operand 120 states. Second operand 3 states. [2019-10-15 03:31:22,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:22,569 INFO L93 Difference]: Finished difference Result 337 states and 581 transitions. [2019-10-15 03:31:22,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:22,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2019-10-15 03:31:22,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:22,596 INFO L225 Difference]: With dead ends: 337 [2019-10-15 03:31:22,596 INFO L226 Difference]: Without dead ends: 215 [2019-10-15 03:31:22,605 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:22,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-10-15 03:31:22,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2019-10-15 03:31:22,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-10-15 03:31:22,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 322 transitions. [2019-10-15 03:31:22,717 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 322 transitions. Word has length 45 [2019-10-15 03:31:22,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:22,718 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 322 transitions. [2019-10-15 03:31:22,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:22,718 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 322 transitions. [2019-10-15 03:31:22,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-15 03:31:22,729 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:22,730 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 03:31:22,730 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:22,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1285581883, now seen corresponding path program 1 times [2019-10-15 03:31:22,732 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:22,732 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461209791] [2019-10-15 03:31:22,732 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:22,733 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:22,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:31:22,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461209791] [2019-10-15 03:31:22,865 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:22,865 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:22,866 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316242134] [2019-10-15 03:31:22,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:22,868 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:22,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:22,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:22,869 INFO L87 Difference]: Start difference. First operand 214 states and 322 transitions. Second operand 3 states. [2019-10-15 03:31:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:23,085 INFO L93 Difference]: Finished difference Result 342 states and 521 transitions. [2019-10-15 03:31:23,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:23,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2019-10-15 03:31:23,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:23,089 INFO L225 Difference]: With dead ends: 342 [2019-10-15 03:31:23,089 INFO L226 Difference]: Without dead ends: 237 [2019-10-15 03:31:23,091 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:23,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-10-15 03:31:23,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 233. [2019-10-15 03:31:23,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-10-15 03:31:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 344 transitions. [2019-10-15 03:31:23,105 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 344 transitions. Word has length 59 [2019-10-15 03:31:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:23,105 INFO L462 AbstractCegarLoop]: Abstraction has 233 states and 344 transitions. [2019-10-15 03:31:23,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 344 transitions. [2019-10-15 03:31:23,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-15 03:31:23,108 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:23,109 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 03:31:23,109 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:23,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:23,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1868973074, now seen corresponding path program 1 times [2019-10-15 03:31:23,110 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:23,110 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751292564] [2019-10-15 03:31:23,110 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:23,110 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:23,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 03:31:23,256 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751292564] [2019-10-15 03:31:23,257 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:23,260 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:31:23,261 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942070858] [2019-10-15 03:31:23,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:31:23,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:23,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:31:23,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:31:23,263 INFO L87 Difference]: Start difference. First operand 233 states and 344 transitions. Second operand 4 states. [2019-10-15 03:31:23,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:23,564 INFO L93 Difference]: Finished difference Result 606 states and 940 transitions. [2019-10-15 03:31:23,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 03:31:23,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2019-10-15 03:31:23,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:23,568 INFO L225 Difference]: With dead ends: 606 [2019-10-15 03:31:23,568 INFO L226 Difference]: Without dead ends: 381 [2019-10-15 03:31:23,570 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:31:23,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2019-10-15 03:31:23,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 349. [2019-10-15 03:31:23,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2019-10-15 03:31:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 486 transitions. [2019-10-15 03:31:23,602 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 486 transitions. Word has length 76 [2019-10-15 03:31:23,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:23,603 INFO L462 AbstractCegarLoop]: Abstraction has 349 states and 486 transitions. [2019-10-15 03:31:23,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:31:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 486 transitions. [2019-10-15 03:31:23,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-15 03:31:23,606 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:23,607 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2019-10-15 03:31:23,607 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:23,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:23,607 INFO L82 PathProgramCache]: Analyzing trace with hash 998761426, now seen corresponding path program 1 times [2019-10-15 03:31:23,608 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:23,608 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452336282] [2019-10-15 03:31:23,608 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:23,608 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:23,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:31:23,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452336282] [2019-10-15 03:31:23,707 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:23,707 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:23,707 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832621399] [2019-10-15 03:31:23,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:23,708 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:23,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:23,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:23,709 INFO L87 Difference]: Start difference. First operand 349 states and 486 transitions. Second operand 3 states. [2019-10-15 03:31:23,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:23,857 INFO L93 Difference]: Finished difference Result 720 states and 1012 transitions. [2019-10-15 03:31:23,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:23,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2019-10-15 03:31:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:23,860 INFO L225 Difference]: With dead ends: 720 [2019-10-15 03:31:23,860 INFO L226 Difference]: Without dead ends: 379 [2019-10-15 03:31:23,862 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2019-10-15 03:31:23,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 375. [2019-10-15 03:31:23,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2019-10-15 03:31:23,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 518 transitions. [2019-10-15 03:31:23,873 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 518 transitions. Word has length 85 [2019-10-15 03:31:23,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:23,874 INFO L462 AbstractCegarLoop]: Abstraction has 375 states and 518 transitions. [2019-10-15 03:31:23,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:23,876 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 518 transitions. [2019-10-15 03:31:23,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 03:31:23,877 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:23,877 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2019-10-15 03:31:23,877 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:23,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:23,878 INFO L82 PathProgramCache]: Analyzing trace with hash 2000050562, now seen corresponding path program 1 times [2019-10-15 03:31:23,878 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:23,878 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71996607] [2019-10-15 03:31:23,879 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:23,879 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:23,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-15 03:31:23,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71996607] [2019-10-15 03:31:23,926 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:23,926 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:23,926 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56139736] [2019-10-15 03:31:23,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:23,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:23,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:23,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:23,928 INFO L87 Difference]: Start difference. First operand 375 states and 518 transitions. Second operand 3 states. [2019-10-15 03:31:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:24,046 INFO L93 Difference]: Finished difference Result 756 states and 1046 transitions. [2019-10-15 03:31:24,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:24,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 03:31:24,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:24,049 INFO L225 Difference]: With dead ends: 756 [2019-10-15 03:31:24,050 INFO L226 Difference]: Without dead ends: 389 [2019-10-15 03:31:24,051 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:24,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2019-10-15 03:31:24,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2019-10-15 03:31:24,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2019-10-15 03:31:24,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 534 transitions. [2019-10-15 03:31:24,062 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 534 transitions. Word has length 86 [2019-10-15 03:31:24,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:24,063 INFO L462 AbstractCegarLoop]: Abstraction has 389 states and 534 transitions. [2019-10-15 03:31:24,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:24,063 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 534 transitions. [2019-10-15 03:31:24,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-15 03:31:24,064 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:24,065 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2019-10-15 03:31:24,065 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:24,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:24,066 INFO L82 PathProgramCache]: Analyzing trace with hash -132862520, now seen corresponding path program 1 times [2019-10-15 03:31:24,066 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:24,066 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476708628] [2019-10-15 03:31:24,066 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:24,066 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:24,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 03:31:24,134 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476708628] [2019-10-15 03:31:24,134 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:24,134 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:24,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372746535] [2019-10-15 03:31:24,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:24,135 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:24,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:24,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:24,136 INFO L87 Difference]: Start difference. First operand 389 states and 534 transitions. Second operand 3 states. [2019-10-15 03:31:24,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:24,342 INFO L93 Difference]: Finished difference Result 906 states and 1272 transitions. [2019-10-15 03:31:24,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:24,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2019-10-15 03:31:24,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:24,346 INFO L225 Difference]: With dead ends: 906 [2019-10-15 03:31:24,346 INFO L226 Difference]: Without dead ends: 519 [2019-10-15 03:31:24,347 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2019-10-15 03:31:24,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 511. [2019-10-15 03:31:24,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2019-10-15 03:31:24,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 712 transitions. [2019-10-15 03:31:24,363 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 712 transitions. Word has length 87 [2019-10-15 03:31:24,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:24,364 INFO L462 AbstractCegarLoop]: Abstraction has 511 states and 712 transitions. [2019-10-15 03:31:24,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:24,364 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 712 transitions. [2019-10-15 03:31:24,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-15 03:31:24,366 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:24,366 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:24,366 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:24,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:24,367 INFO L82 PathProgramCache]: Analyzing trace with hash -853897945, now seen corresponding path program 1 times [2019-10-15 03:31:24,367 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:24,367 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773390506] [2019-10-15 03:31:24,367 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:24,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:24,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-15 03:31:24,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773390506] [2019-10-15 03:31:24,434 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:24,434 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:24,434 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631768568] [2019-10-15 03:31:24,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:24,435 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:24,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:24,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:24,436 INFO L87 Difference]: Start difference. First operand 511 states and 712 transitions. Second operand 3 states. [2019-10-15 03:31:24,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:24,584 INFO L93 Difference]: Finished difference Result 1080 states and 1526 transitions. [2019-10-15 03:31:24,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:24,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2019-10-15 03:31:24,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:24,590 INFO L225 Difference]: With dead ends: 1080 [2019-10-15 03:31:24,590 INFO L226 Difference]: Without dead ends: 577 [2019-10-15 03:31:24,592 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:24,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2019-10-15 03:31:24,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 557. [2019-10-15 03:31:24,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 557 states. [2019-10-15 03:31:24,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 764 transitions. [2019-10-15 03:31:24,618 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 764 transitions. Word has length 96 [2019-10-15 03:31:24,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:24,619 INFO L462 AbstractCegarLoop]: Abstraction has 557 states and 764 transitions. [2019-10-15 03:31:24,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:24,619 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 764 transitions. [2019-10-15 03:31:24,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-15 03:31:24,621 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:24,621 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:24,622 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:24,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:24,622 INFO L82 PathProgramCache]: Analyzing trace with hash -263758197, now seen corresponding path program 1 times [2019-10-15 03:31:24,622 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:24,623 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576653257] [2019-10-15 03:31:24,623 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:24,623 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:24,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-15 03:31:24,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576653257] [2019-10-15 03:31:24,700 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:24,700 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:24,700 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381696427] [2019-10-15 03:31:24,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:24,701 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:24,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:24,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:24,702 INFO L87 Difference]: Start difference. First operand 557 states and 764 transitions. Second operand 3 states. [2019-10-15 03:31:24,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:24,865 INFO L93 Difference]: Finished difference Result 1172 states and 1632 transitions. [2019-10-15 03:31:24,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:24,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2019-10-15 03:31:24,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:24,870 INFO L225 Difference]: With dead ends: 1172 [2019-10-15 03:31:24,870 INFO L226 Difference]: Without dead ends: 623 [2019-10-15 03:31:24,871 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:24,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-10-15 03:31:24,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 607. [2019-10-15 03:31:24,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2019-10-15 03:31:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 820 transitions. [2019-10-15 03:31:24,889 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 820 transitions. Word has length 120 [2019-10-15 03:31:24,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:24,889 INFO L462 AbstractCegarLoop]: Abstraction has 607 states and 820 transitions. [2019-10-15 03:31:24,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:24,889 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 820 transitions. [2019-10-15 03:31:24,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 03:31:24,891 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:24,892 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2019-10-15 03:31:24,892 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:24,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1625696356, now seen corresponding path program 1 times [2019-10-15 03:31:24,893 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:24,893 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423928250] [2019-10-15 03:31:24,893 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:24,893 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:24,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-15 03:31:24,946 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423928250] [2019-10-15 03:31:24,947 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:24,948 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:24,948 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662056088] [2019-10-15 03:31:24,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:24,949 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:24,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:24,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:24,949 INFO L87 Difference]: Start difference. First operand 607 states and 820 transitions. Second operand 3 states. [2019-10-15 03:31:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:25,128 INFO L93 Difference]: Finished difference Result 1220 states and 1652 transitions. [2019-10-15 03:31:25,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:25,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2019-10-15 03:31:25,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:25,132 INFO L225 Difference]: With dead ends: 1220 [2019-10-15 03:31:25,132 INFO L226 Difference]: Without dead ends: 619 [2019-10-15 03:31:25,133 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:25,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2019-10-15 03:31:25,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 613. [2019-10-15 03:31:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2019-10-15 03:31:25,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 824 transitions. [2019-10-15 03:31:25,152 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 824 transitions. Word has length 125 [2019-10-15 03:31:25,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:25,153 INFO L462 AbstractCegarLoop]: Abstraction has 613 states and 824 transitions. [2019-10-15 03:31:25,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:25,153 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 824 transitions. [2019-10-15 03:31:25,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-15 03:31:25,155 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:25,156 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:25,156 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:25,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:25,156 INFO L82 PathProgramCache]: Analyzing trace with hash 905548674, now seen corresponding path program 1 times [2019-10-15 03:31:25,157 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:25,157 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995903227] [2019-10-15 03:31:25,157 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:25,157 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:25,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:25,221 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-10-15 03:31:25,222 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995903227] [2019-10-15 03:31:25,222 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:25,223 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:25,223 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959611115] [2019-10-15 03:31:25,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:25,224 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:25,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:25,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:25,225 INFO L87 Difference]: Start difference. First operand 613 states and 824 transitions. Second operand 3 states. [2019-10-15 03:31:25,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:25,388 INFO L93 Difference]: Finished difference Result 1276 states and 1738 transitions. [2019-10-15 03:31:25,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:25,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2019-10-15 03:31:25,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:25,392 INFO L225 Difference]: With dead ends: 1276 [2019-10-15 03:31:25,392 INFO L226 Difference]: Without dead ends: 671 [2019-10-15 03:31:25,394 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:25,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2019-10-15 03:31:25,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 667. [2019-10-15 03:31:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 667 states. [2019-10-15 03:31:25,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 884 transitions. [2019-10-15 03:31:25,412 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 884 transitions. Word has length 142 [2019-10-15 03:31:25,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:25,413 INFO L462 AbstractCegarLoop]: Abstraction has 667 states and 884 transitions. [2019-10-15 03:31:25,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:25,413 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 884 transitions. [2019-10-15 03:31:25,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-15 03:31:25,416 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:25,416 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:25,416 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:25,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:25,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1201915860, now seen corresponding path program 1 times [2019-10-15 03:31:25,417 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:25,417 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258510470] [2019-10-15 03:31:25,418 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:25,418 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:25,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-10-15 03:31:25,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258510470] [2019-10-15 03:31:25,471 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:31:25,472 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:31:25,472 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554734884] [2019-10-15 03:31:25,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:31:25,472 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:31:25,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:31:25,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:25,473 INFO L87 Difference]: Start difference. First operand 667 states and 884 transitions. Second operand 3 states. [2019-10-15 03:31:25,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:31:25,623 INFO L93 Difference]: Finished difference Result 1384 states and 1862 transitions. [2019-10-15 03:31:25,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:31:25,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2019-10-15 03:31:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:31:25,628 INFO L225 Difference]: With dead ends: 1384 [2019-10-15 03:31:25,628 INFO L226 Difference]: Without dead ends: 725 [2019-10-15 03:31:25,630 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:31:25,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2019-10-15 03:31:25,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 725. [2019-10-15 03:31:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2019-10-15 03:31:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 948 transitions. [2019-10-15 03:31:25,650 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 948 transitions. Word has length 147 [2019-10-15 03:31:25,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:31:25,650 INFO L462 AbstractCegarLoop]: Abstraction has 725 states and 948 transitions. [2019-10-15 03:31:25,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:31:25,651 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 948 transitions. [2019-10-15 03:31:25,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-15 03:31:25,653 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:31:25,654 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:31:25,654 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:31:25,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:31:25,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2107800550, now seen corresponding path program 1 times [2019-10-15 03:31:25,655 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:31:25,655 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97804534] [2019-10-15 03:31:25,655 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:25,655 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:31:25,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:31:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 164 proven. 25 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-10-15 03:31:25,741 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97804534] [2019-10-15 03:31:25,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42517057] [2019-10-15 03:31:25,742 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 [2019-10-15 03:31:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:31:25,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:31:25,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:31:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 164 proven. 25 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-10-15 03:31:25,959 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:31:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 164 proven. 25 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-10-15 03:31:26,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [931365785] [2019-10-15 03:31:26,091 INFO L162 IcfgInterpreter]: Started Sifa with 68 locations of interest [2019-10-15 03:31:26,091 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:31:26,099 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:31:26,110 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:31:26,110 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:31:26,171 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:31:26,183 INFO L199 IcfgInterpreter]: Interpreting procedure ssl3_accept with input of size 3 for LOIs [2019-10-15 03:31:27,386 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2019-10-15 03:31:27,559 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 196 [2019-10-15 03:31:28,626 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 186 [2019-10-15 03:31:52,252 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:31:52,254 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:31:53,676 WARN L191 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 271 DAG size of output: 151 [2019-10-15 03:31:54,462 WARN L191 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 148 [2019-10-15 03:31:55,139 WARN L191 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 143 [2019-10-15 03:31:55,984 WARN L191 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 152 [2019-10-15 03:31:56,740 WARN L191 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 149 [2019-10-15 03:31:57,462 WARN L191 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 147 [2019-10-15 03:31:58,583 WARN L191 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 188 DAG size of output: 171