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_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:30:30,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:30:30,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:30:30,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:30:30,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:30:30,916 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:30:30,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:30:30,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:30:30,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:30:30,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:30:30,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:30:30,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:30:30,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:30:30,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:30:30,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:30:30,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:30:30,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:30:30,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:30:30,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:30:30,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:30:30,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:30:30,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:30:30,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:30:30,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:30:30,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:30:30,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:30:30,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:30:30,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:30:30,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:30:30,942 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:30:30,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:30:30,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:30:30,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:30:30,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:30:30,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:30:30,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:30:30,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:30:30,946 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:30:30,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:30:30,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:30:30,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:30:30,949 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 03:30:30,969 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:30:30,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:30:30,971 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:30:30,971 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:30:30,971 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:30:30,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:30:30,972 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:30:30,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:30:30,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:30:30,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:30:30,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:30:30,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:30:30,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:30:30,974 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:30:30,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:30:30,975 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:30:30,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:30:30,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:30:30,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:30:30,976 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:30:30,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:30:30,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:30:30,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:30:30,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:30:30,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:30:30,978 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:30:30,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:30:30,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:30:30,979 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 03:30:31,272 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:30:31,293 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:30:31,296 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:30:31,298 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:30:31,298 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:30:31,299 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_clnt_1.cil-2.c [2019-10-15 03:30:31,375 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db42e84c4/590651c36fa849f3bffa1d56247e3538/FLAG526f43452 [2019-10-15 03:30:31,807 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:30:31,807 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_clnt_1.cil-2.c [2019-10-15 03:30:31,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db42e84c4/590651c36fa849f3bffa1d56247e3538/FLAG526f43452 [2019-10-15 03:30:32,203 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db42e84c4/590651c36fa849f3bffa1d56247e3538 [2019-10-15 03:30:32,215 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:30:32,218 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:30:32,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:30:32,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:30:32,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:30:32,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:30:32" (1/1) ... [2019-10-15 03:30:32,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6063a733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:30:32, skipping insertion in model container [2019-10-15 03:30:32,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:30:32" (1/1) ... [2019-10-15 03:30:32,237 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:30:32,293 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:30:32,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:30:32,653 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:30:32,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:30:32,832 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:30:32,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:30:32 WrapperNode [2019-10-15 03:30:32,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:30:32,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:30:32,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:30:32,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:30:32,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:30:32" (1/1) ... [2019-10-15 03:30:32,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:30:32" (1/1) ... [2019-10-15 03:30:32,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:30:32" (1/1) ... [2019-10-15 03:30:32,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:30:32" (1/1) ... [2019-10-15 03:30:32,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:30:32" (1/1) ... [2019-10-15 03:30:32,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:30:32" (1/1) ... [2019-10-15 03:30:32,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:30:32" (1/1) ... [2019-10-15 03:30:32,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:30:32,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:30:32,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:30:32,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:30:32,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:30:32" (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 03:30:32,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:30:32,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:30:32,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_connect [2019-10-15 03:30:32,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:30:32,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:30:32,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-15 03:30:32,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:30:32,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-15 03:30:32,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-15 03:30:32,966 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_connect [2019-10-15 03:30:32,966 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:30:32,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:30:32,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:30:33,106 WARN L732 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-10-15 03:30:33,708 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2019-10-15 03:30:33,708 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2019-10-15 03:30:34,083 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:30:34,083 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 03:30:34,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:30:34 BoogieIcfgContainer [2019-10-15 03:30:34,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:30:34,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:30:34,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:30:34,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:30:34,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:30:32" (1/3) ... [2019-10-15 03:30:34,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e4891d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:30:34, skipping insertion in model container [2019-10-15 03:30:34,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:30:32" (2/3) ... [2019-10-15 03:30:34,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e4891d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:30:34, skipping insertion in model container [2019-10-15 03:30:34,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:30:34" (3/3) ... [2019-10-15 03:30:34,114 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_clnt_1.cil-2.c [2019-10-15 03:30:34,129 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:30:34,142 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:30:34,158 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:30:34,209 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:30:34,209 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:30:34,210 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:30:34,210 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:30:34,210 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:30:34,210 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:30:34,211 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:30:34,211 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:30:34,247 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2019-10-15 03:30:34,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 03:30:34,255 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:30:34,256 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] [2019-10-15 03:30:34,258 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:30:34,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:30:34,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1309666845, now seen corresponding path program 1 times [2019-10-15 03:30:34,275 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:30:34,275 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978690885] [2019-10-15 03:30:34,276 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:30:34,276 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:30:34,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:30:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:30:34,570 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 03:30:34,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978690885] [2019-10-15 03:30:34,572 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:30:34,572 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:30:34,572 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100766504] [2019-10-15 03:30:34,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:30:34,577 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:30:34,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:30:34,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:30:34,594 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 3 states. [2019-10-15 03:30:34,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:30:34,697 INFO L93 Difference]: Finished difference Result 183 states and 304 transitions. [2019-10-15 03:30:34,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:30:34,700 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-15 03:30:34,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:30:34,721 INFO L225 Difference]: With dead ends: 183 [2019-10-15 03:30:34,721 INFO L226 Difference]: Without dead ends: 164 [2019-10-15 03:30:34,727 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 03:30:34,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-10-15 03:30:34,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2019-10-15 03:30:34,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-10-15 03:30:34,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 237 transitions. [2019-10-15 03:30:34,836 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 237 transitions. Word has length 25 [2019-10-15 03:30:34,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:30:34,837 INFO L462 AbstractCegarLoop]: Abstraction has 163 states and 237 transitions. [2019-10-15 03:30:34,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:30:34,838 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 237 transitions. [2019-10-15 03:30:34,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-15 03:30:34,841 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:30:34,842 INFO L380 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] [2019-10-15 03:30:34,842 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:30:34,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:30:34,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1837958169, now seen corresponding path program 1 times [2019-10-15 03:30:34,844 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:30:34,844 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303517893] [2019-10-15 03:30:34,845 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:30:34,845 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:30:34,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:30:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:30:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:30:34,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303517893] [2019-10-15 03:30:34,988 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:30:34,988 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:30:34,988 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402969890] [2019-10-15 03:30:34,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:30:34,990 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:30:34,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:30:34,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:30:34,991 INFO L87 Difference]: Start difference. First operand 163 states and 237 transitions. Second operand 3 states. [2019-10-15 03:30:35,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:30:35,160 INFO L93 Difference]: Finished difference Result 262 states and 384 transitions. [2019-10-15 03:30:35,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:30:35,160 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2019-10-15 03:30:35,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:30:35,163 INFO L225 Difference]: With dead ends: 262 [2019-10-15 03:30:35,163 INFO L226 Difference]: Without dead ends: 182 [2019-10-15 03:30:35,165 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 03:30:35,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-10-15 03:30:35,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2019-10-15 03:30:35,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-10-15 03:30:35,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 255 transitions. [2019-10-15 03:30:35,183 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 255 transitions. Word has length 36 [2019-10-15 03:30:35,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:30:35,183 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 255 transitions. [2019-10-15 03:30:35,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:30:35,184 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 255 transitions. [2019-10-15 03:30:35,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 03:30:35,186 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:30:35,186 INFO L380 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] [2019-10-15 03:30:35,187 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:30:35,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:30:35,187 INFO L82 PathProgramCache]: Analyzing trace with hash -383590025, now seen corresponding path program 1 times [2019-10-15 03:30:35,187 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:30:35,188 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833129695] [2019-10-15 03:30:35,188 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:30:35,188 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:30:35,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:30:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:30:35,317 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:30:35,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833129695] [2019-10-15 03:30:35,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129479612] [2019-10-15 03:30:35,318 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 03:30:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:30:35,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:30:35,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:30:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 03:30:35,470 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:30:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 03:30:35,511 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:30:35,511 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 9 [2019-10-15 03:30:35,511 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891036267] [2019-10-15 03:30:35,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 03:30:35,512 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:30:35,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 03:30:35,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:30:35,513 INFO L87 Difference]: Start difference. First operand 178 states and 255 transitions. Second operand 6 states. [2019-10-15 03:30:36,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:30:36,014 INFO L93 Difference]: Finished difference Result 533 states and 825 transitions. [2019-10-15 03:30:36,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:30:36,015 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2019-10-15 03:30:36,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:30:36,022 INFO L225 Difference]: With dead ends: 533 [2019-10-15 03:30:36,022 INFO L226 Difference]: Without dead ends: 360 [2019-10-15 03:30:36,027 INFO L600 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 [2019-10-15 03:30:36,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2019-10-15 03:30:36,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 328. [2019-10-15 03:30:36,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2019-10-15 03:30:36,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 457 transitions. [2019-10-15 03:30:36,071 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 457 transitions. Word has length 49 [2019-10-15 03:30:36,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:30:36,072 INFO L462 AbstractCegarLoop]: Abstraction has 328 states and 457 transitions. [2019-10-15 03:30:36,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 03:30:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 457 transitions. [2019-10-15 03:30:36,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-15 03:30:36,080 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:30:36,080 INFO L380 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] [2019-10-15 03:30:36,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:30:36,287 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:30:36,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:30:36,287 INFO L82 PathProgramCache]: Analyzing trace with hash 852923754, now seen corresponding path program 1 times [2019-10-15 03:30:36,288 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:30:36,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021609499] [2019-10-15 03:30:36,289 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:30:36,289 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:30:36,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:30:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:30:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-15 03:30:36,392 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021609499] [2019-10-15 03:30:36,392 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:30:36,393 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:30:36,393 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188586255] [2019-10-15 03:30:36,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:30:36,393 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:30:36,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:30:36,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:30:36,394 INFO L87 Difference]: Start difference. First operand 328 states and 457 transitions. Second operand 3 states. [2019-10-15 03:30:36,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:30:36,535 INFO L93 Difference]: Finished difference Result 691 states and 979 transitions. [2019-10-15 03:30:36,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:30:36,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2019-10-15 03:30:36,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:30:36,539 INFO L225 Difference]: With dead ends: 691 [2019-10-15 03:30:36,539 INFO L226 Difference]: Without dead ends: 370 [2019-10-15 03:30:36,541 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 03:30:36,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2019-10-15 03:30:36,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 366. [2019-10-15 03:30:36,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2019-10-15 03:30:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 501 transitions. [2019-10-15 03:30:36,557 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 501 transitions. Word has length 64 [2019-10-15 03:30:36,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:30:36,557 INFO L462 AbstractCegarLoop]: Abstraction has 366 states and 501 transitions. [2019-10-15 03:30:36,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:30:36,558 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 501 transitions. [2019-10-15 03:30:36,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-15 03:30:36,562 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:30:36,562 INFO L380 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] [2019-10-15 03:30:36,562 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:30:36,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:30:36,563 INFO L82 PathProgramCache]: Analyzing trace with hash 386455683, now seen corresponding path program 1 times [2019-10-15 03:30:36,563 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:30:36,563 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27777996] [2019-10-15 03:30:36,563 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:30:36,564 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:30:36,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:30:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:30:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-15 03:30:36,675 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27777996] [2019-10-15 03:30:36,675 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771480626] [2019-10-15 03:30:36,675 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 [2019-10-15 03:30:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:30:36,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 03:30:36,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:30:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-15 03:30:36,803 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:30:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-15 03:30:36,845 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:30:36,845 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6] total 10 [2019-10-15 03:30:36,845 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834789037] [2019-10-15 03:30:36,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 03:30:36,849 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:30:36,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 03:30:36,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:30:36,850 INFO L87 Difference]: Start difference. First operand 366 states and 501 transitions. Second operand 6 states. [2019-10-15 03:30:37,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:30:37,187 INFO L93 Difference]: Finished difference Result 852 states and 1223 transitions. [2019-10-15 03:30:37,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:30:37,188 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2019-10-15 03:30:37,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:30:37,191 INFO L225 Difference]: With dead ends: 852 [2019-10-15 03:30:37,191 INFO L226 Difference]: Without dead ends: 463 [2019-10-15 03:30:37,193 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:30:37,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2019-10-15 03:30:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 413. [2019-10-15 03:30:37,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2019-10-15 03:30:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 578 transitions. [2019-10-15 03:30:37,212 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 578 transitions. Word has length 82 [2019-10-15 03:30:37,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:30:37,212 INFO L462 AbstractCegarLoop]: Abstraction has 413 states and 578 transitions. [2019-10-15 03:30:37,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 03:30:37,213 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 578 transitions. [2019-10-15 03:30:37,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-15 03:30:37,218 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:30:37,218 INFO L380 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] [2019-10-15 03:30:37,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:30:37,426 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ssl3_connectErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:30:37,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:30:37,427 INFO L82 PathProgramCache]: Analyzing trace with hash -356734917, now seen corresponding path program 1 times [2019-10-15 03:30:37,427 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:30:37,427 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345558172] [2019-10-15 03:30:37,427 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:30:37,427 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:30:37,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:30:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:30:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 03:30:37,525 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345558172] [2019-10-15 03:30:37,525 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71360051] [2019-10-15 03:30:37,525 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 [2019-10-15 03:30:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:30:37,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 03:30:37,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:30:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-10-15 03:30:37,632 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:30:37,666 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:30:37,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:30:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-15 03:30:37,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [879977579] [2019-10-15 03:30:37,745 INFO L162 IcfgInterpreter]: Started Sifa with 42 locations of interest [2019-10-15 03:30:37,745 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:30:37,750 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:30:37,758 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:30:37,759 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:30:37,804 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:30:37,813 INFO L199 IcfgInterpreter]: Interpreting procedure ssl3_connect with input of size 3 for LOIs [2019-10-15 03:30:41,176 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 184 [2019-10-15 03:30:42,854 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 194