/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_3.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:50:28,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:50:28,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:50:28,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:50:28,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:50:28,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:50:28,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:50:28,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:50:28,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:50:28,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:50:28,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:50:28,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:50:28,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:50:28,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:50:28,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:50:28,320 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:50:28,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:50:28,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:50:28,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:50:28,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:50:28,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:50:28,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:50:28,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:50:28,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:50:28,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 04:50:28,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:50:28,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:50:28,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:50:28,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:50:28,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:50:28,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:50:28,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:50:28,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:50:28,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:50:28,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:50:28,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:50:28,340 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 04:50:28,353 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:50:28,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:50:28,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:50:28,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:50:28,355 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:50:28,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:50:28,356 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:50:28,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:50:28,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:50:28,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:50:28,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:50:28,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:50:28,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:50:28,357 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:50:28,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:50:28,357 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:50:28,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:50:28,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:50:28,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:50:28,358 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:50:28,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:50:28,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:50:28,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:50:28,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:50:28,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:50:28,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:50:28,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:50:28,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:50:28,360 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 04:50:28,678 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:50:28,691 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:50:28,694 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:50:28,696 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:50:28,696 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:50:28,697 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_3.cil.c [2019-11-07 04:50:28,757 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fd0b01c1/233f5414931340b1a7ea83d8d3737a2f/FLAGf7e9a0f0f [2019-11-07 04:50:29,276 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:50:29,277 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_3.cil.c [2019-11-07 04:50:29,293 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fd0b01c1/233f5414931340b1a7ea83d8d3737a2f/FLAGf7e9a0f0f [2019-11-07 04:50:29,628 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fd0b01c1/233f5414931340b1a7ea83d8d3737a2f [2019-11-07 04:50:29,652 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:50:29,657 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:50:29,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:50:29,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:50:29,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:50:29,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:50:29" (1/1) ... [2019-11-07 04:50:29,683 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19757915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:29, skipping insertion in model container [2019-11-07 04:50:29,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:50:29" (1/1) ... [2019-11-07 04:50:29,695 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:50:29,758 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:50:30,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:50:30,017 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:50:30,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:50:30,208 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:50:30,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:30 WrapperNode [2019-11-07 04:50:30,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:50:30,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:50:30,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:50:30,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:50:30,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:30" (1/1) ... [2019-11-07 04:50:30,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:30" (1/1) ... [2019-11-07 04:50:30,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:30" (1/1) ... [2019-11-07 04:50:30,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:30" (1/1) ... [2019-11-07 04:50:30,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:30" (1/1) ... [2019-11-07 04:50:30,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:30" (1/1) ... [2019-11-07 04:50:30,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:30" (1/1) ... [2019-11-07 04:50:30,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:50:30,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:50:30,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:50:30,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:50:30,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:50:30,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:50:30,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:50:30,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2019-11-07 04:50:30,339 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:50:30,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:50:30,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-07 04:50:30,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:50:30,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-11-07 04:50:30,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-11-07 04:50:30,340 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2019-11-07 04:50:30,340 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:50:30,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:50:30,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:50:30,552 WARN L735 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-07 04:50:31,129 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2019-11-07 04:50:31,129 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2019-11-07 04:50:31,434 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:50:31,435 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 04:50:31,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:50:31 BoogieIcfgContainer [2019-11-07 04:50:31,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:50:31,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:50:31,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:50:31,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:50:31,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:50:29" (1/3) ... [2019-11-07 04:50:31,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4b9e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:50:31, skipping insertion in model container [2019-11-07 04:50:31,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:50:30" (2/3) ... [2019-11-07 04:50:31,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4b9e49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:50:31, skipping insertion in model container [2019-11-07 04:50:31,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:50:31" (3/3) ... [2019-11-07 04:50:31,446 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_3.cil.c [2019-11-07 04:50:31,457 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:50:31,466 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:50:31,478 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:50:31,503 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:50:31,504 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:50:31,504 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:50:31,504 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:50:31,504 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:50:31,505 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:50:31,505 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:50:31,505 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:50:31,527 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states. [2019-11-07 04:50:31,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-07 04:50:31,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:31,539 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:31,541 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:31,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:31,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1372086724, now seen corresponding path program 1 times [2019-11-07 04:50:31,557 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:31,557 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619432319] [2019-11-07 04:50:31,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:50:31,850 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619432319] [2019-11-07 04:50:31,851 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:31,852 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:31,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361875179] [2019-11-07 04:50:31,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:31,859 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:31,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:31,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:31,876 INFO L87 Difference]: Start difference. First operand 116 states. Second operand 3 states. [2019-11-07 04:50:32,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:32,013 INFO L93 Difference]: Finished difference Result 226 states and 380 transitions. [2019-11-07 04:50:32,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:32,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2019-11-07 04:50:32,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:32,039 INFO L225 Difference]: With dead ends: 226 [2019-11-07 04:50:32,039 INFO L226 Difference]: Without dead ends: 207 [2019-11-07 04:50:32,045 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:32,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-11-07 04:50:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2019-11-07 04:50:32,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-11-07 04:50:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 310 transitions. [2019-11-07 04:50:32,159 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 310 transitions. Word has length 45 [2019-11-07 04:50:32,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:32,161 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 310 transitions. [2019-11-07 04:50:32,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:32,161 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 310 transitions. [2019-11-07 04:50:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-07 04:50:32,167 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:32,167 INFO L410 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] [2019-11-07 04:50:32,167 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:32,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:32,168 INFO L82 PathProgramCache]: Analyzing trace with hash 957934719, now seen corresponding path program 1 times [2019-11-07 04:50:32,168 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:32,169 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259651025] [2019-11-07 04:50:32,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:50:32,311 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259651025] [2019-11-07 04:50:32,311 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:32,311 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:32,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357100216] [2019-11-07 04:50:32,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:32,315 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:32,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:32,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:32,316 INFO L87 Difference]: Start difference. First operand 206 states and 310 transitions. Second operand 3 states. [2019-11-07 04:50:32,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:32,530 INFO L93 Difference]: Finished difference Result 330 states and 501 transitions. [2019-11-07 04:50:32,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:32,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2019-11-07 04:50:32,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:32,533 INFO L225 Difference]: With dead ends: 330 [2019-11-07 04:50:32,533 INFO L226 Difference]: Without dead ends: 229 [2019-11-07 04:50:32,535 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:32,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-11-07 04:50:32,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 225. [2019-11-07 04:50:32,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-11-07 04:50:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 332 transitions. [2019-11-07 04:50:32,553 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 332 transitions. Word has length 59 [2019-11-07 04:50:32,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:32,554 INFO L462 AbstractCegarLoop]: Abstraction has 225 states and 332 transitions. [2019-11-07 04:50:32,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 332 transitions. [2019-11-07 04:50:32,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-07 04:50:32,558 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:32,558 INFO L410 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] [2019-11-07 04:50:32,559 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:32,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:32,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1666864660, now seen corresponding path program 1 times [2019-11-07 04:50:32,560 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:32,560 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90732500] [2019-11-07 04:50:32,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 04:50:32,683 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90732500] [2019-11-07 04:50:32,683 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:32,683 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 04:50:32,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645273235] [2019-11-07 04:50:32,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:50:32,686 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:32,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:50:32,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:50:32,691 INFO L87 Difference]: Start difference. First operand 225 states and 332 transitions. Second operand 4 states. [2019-11-07 04:50:32,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:32,995 INFO L93 Difference]: Finished difference Result 532 states and 816 transitions. [2019-11-07 04:50:32,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:50:32,997 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2019-11-07 04:50:32,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:33,000 INFO L225 Difference]: With dead ends: 532 [2019-11-07 04:50:33,001 INFO L226 Difference]: Without dead ends: 315 [2019-11-07 04:50:33,004 INFO L630 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 [2019-11-07 04:50:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2019-11-07 04:50:33,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 301. [2019-11-07 04:50:33,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-11-07 04:50:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 416 transitions. [2019-11-07 04:50:33,031 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 416 transitions. Word has length 76 [2019-11-07 04:50:33,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:33,031 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 416 transitions. [2019-11-07 04:50:33,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:50:33,032 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 416 transitions. [2019-11-07 04:50:33,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-07 04:50:33,040 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:33,042 INFO L410 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] [2019-11-07 04:50:33,042 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:33,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:33,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1133337646, now seen corresponding path program 1 times [2019-11-07 04:50:33,043 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:33,043 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577276449] [2019-11-07 04:50:33,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-07 04:50:33,143 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577276449] [2019-11-07 04:50:33,143 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:33,144 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:33,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315819980] [2019-11-07 04:50:33,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:33,145 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:33,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:33,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:33,146 INFO L87 Difference]: Start difference. First operand 301 states and 416 transitions. Second operand 3 states. [2019-11-07 04:50:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:33,348 INFO L93 Difference]: Finished difference Result 660 states and 940 transitions. [2019-11-07 04:50:33,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:33,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2019-11-07 04:50:33,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:33,354 INFO L225 Difference]: With dead ends: 660 [2019-11-07 04:50:33,354 INFO L226 Difference]: Without dead ends: 367 [2019-11-07 04:50:33,357 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:33,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2019-11-07 04:50:33,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 347. [2019-11-07 04:50:33,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2019-11-07 04:50:33,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 468 transitions. [2019-11-07 04:50:33,386 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 468 transitions. Word has length 96 [2019-11-07 04:50:33,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:33,388 INFO L462 AbstractCegarLoop]: Abstraction has 347 states and 468 transitions. [2019-11-07 04:50:33,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:33,388 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 468 transitions. [2019-11-07 04:50:33,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-07 04:50:33,391 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:33,391 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:33,391 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:33,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:33,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1132987575, now seen corresponding path program 1 times [2019-11-07 04:50:33,392 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:33,393 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704175914] [2019-11-07 04:50:33,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:50:33,544 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704175914] [2019-11-07 04:50:33,545 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699414992] [2019-11-07 04:50:33,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:50:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:33,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 04:50:33,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:50:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:50:33,739 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:50:33,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:50:33,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:50:33,785 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:50:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-07 04:50:33,813 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:50:33,813 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 6] total 7 [2019-11-07 04:50:33,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533149568] [2019-11-07 04:50:33,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:33,815 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:33,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:33,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:50:33,815 INFO L87 Difference]: Start difference. First operand 347 states and 468 transitions. Second operand 3 states. [2019-11-07 04:50:33,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:33,849 INFO L93 Difference]: Finished difference Result 684 states and 926 transitions. [2019-11-07 04:50:33,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:33,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2019-11-07 04:50:33,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:33,854 INFO L225 Difference]: With dead ends: 684 [2019-11-07 04:50:33,855 INFO L226 Difference]: Without dead ends: 682 [2019-11-07 04:50:33,856 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 224 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:50:33,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-07 04:50:33,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2019-11-07 04:50:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2019-11-07 04:50:33,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 922 transitions. [2019-11-07 04:50:33,878 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 922 transitions. Word has length 114 [2019-11-07 04:50:33,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:33,879 INFO L462 AbstractCegarLoop]: Abstraction has 680 states and 922 transitions. [2019-11-07 04:50:33,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:33,879 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 922 transitions. [2019-11-07 04:50:33,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-07 04:50:33,882 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:33,882 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-07 04:50:34,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:50:34,086 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:34,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:34,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1179716728, now seen corresponding path program 1 times [2019-11-07 04:50:34,086 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:34,087 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734406039] [2019-11-07 04:50:34,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-07 04:50:34,173 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734406039] [2019-11-07 04:50:34,173 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:34,174 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:34,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113524889] [2019-11-07 04:50:34,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:34,175 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:34,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:34,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:34,176 INFO L87 Difference]: Start difference. First operand 680 states and 922 transitions. Second operand 3 states. [2019-11-07 04:50:34,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:34,406 INFO L93 Difference]: Finished difference Result 1548 states and 2184 transitions. [2019-11-07 04:50:34,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:34,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2019-11-07 04:50:34,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:34,413 INFO L225 Difference]: With dead ends: 1548 [2019-11-07 04:50:34,413 INFO L226 Difference]: Without dead ends: 876 [2019-11-07 04:50:34,415 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:34,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2019-11-07 04:50:34,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 836. [2019-11-07 04:50:34,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2019-11-07 04:50:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1102 transitions. [2019-11-07 04:50:34,444 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1102 transitions. Word has length 148 [2019-11-07 04:50:34,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:34,448 INFO L462 AbstractCegarLoop]: Abstraction has 836 states and 1102 transitions. [2019-11-07 04:50:34,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:34,448 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1102 transitions. [2019-11-07 04:50:34,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-07 04:50:34,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:34,454 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-07 04:50:34,454 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:34,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:34,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1248685626, now seen corresponding path program 2 times [2019-11-07 04:50:34,455 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:34,455 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083074253] [2019-11-07 04:50:34,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-07 04:50:34,517 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083074253] [2019-11-07 04:50:34,517 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:34,518 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:34,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880404137] [2019-11-07 04:50:34,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:34,519 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:34,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:34,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:34,520 INFO L87 Difference]: Start difference. First operand 836 states and 1102 transitions. Second operand 3 states. [2019-11-07 04:50:34,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:34,737 INFO L93 Difference]: Finished difference Result 1860 states and 2544 transitions. [2019-11-07 04:50:34,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:34,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2019-11-07 04:50:34,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:34,743 INFO L225 Difference]: With dead ends: 1860 [2019-11-07 04:50:34,743 INFO L226 Difference]: Without dead ends: 1032 [2019-11-07 04:50:34,746 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:34,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2019-11-07 04:50:34,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 984. [2019-11-07 04:50:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2019-11-07 04:50:34,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1274 transitions. [2019-11-07 04:50:34,777 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1274 transitions. Word has length 148 [2019-11-07 04:50:34,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:34,777 INFO L462 AbstractCegarLoop]: Abstraction has 984 states and 1274 transitions. [2019-11-07 04:50:34,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:34,778 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1274 transitions. [2019-11-07 04:50:34,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-07 04:50:34,781 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:34,781 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2019-11-07 04:50:34,782 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:34,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:34,782 INFO L82 PathProgramCache]: Analyzing trace with hash 265462632, now seen corresponding path program 1 times [2019-11-07 04:50:34,782 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:34,783 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042723556] [2019-11-07 04:50:34,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-11-07 04:50:34,864 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042723556] [2019-11-07 04:50:34,864 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:34,864 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:34,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615738729] [2019-11-07 04:50:34,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:34,865 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:34,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:34,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:34,866 INFO L87 Difference]: Start difference. First operand 984 states and 1274 transitions. Second operand 3 states. [2019-11-07 04:50:35,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:35,033 INFO L93 Difference]: Finished difference Result 2092 states and 2776 transitions. [2019-11-07 04:50:35,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:35,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2019-11-07 04:50:35,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:35,040 INFO L225 Difference]: With dead ends: 2092 [2019-11-07 04:50:35,040 INFO L226 Difference]: Without dead ends: 1116 [2019-11-07 04:50:35,042 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2019-11-07 04:50:35,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1084. [2019-11-07 04:50:35,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1084 states. [2019-11-07 04:50:35,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1386 transitions. [2019-11-07 04:50:35,081 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1386 transitions. Word has length 154 [2019-11-07 04:50:35,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:35,082 INFO L462 AbstractCegarLoop]: Abstraction has 1084 states and 1386 transitions. [2019-11-07 04:50:35,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:35,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1386 transitions. [2019-11-07 04:50:35,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-07 04:50:35,089 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:35,089 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-07 04:50:35,090 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:35,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:35,090 INFO L82 PathProgramCache]: Analyzing trace with hash 426251506, now seen corresponding path program 1 times [2019-11-07 04:50:35,091 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:35,091 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334965452] [2019-11-07 04:50:35,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-07 04:50:35,199 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334965452] [2019-11-07 04:50:35,199 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:35,200 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:35,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760429670] [2019-11-07 04:50:35,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:35,201 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:35,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:35,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:35,202 INFO L87 Difference]: Start difference. First operand 1084 states and 1386 transitions. Second operand 3 states. [2019-11-07 04:50:35,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:35,483 INFO L93 Difference]: Finished difference Result 2370 states and 3126 transitions. [2019-11-07 04:50:35,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:35,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 157 [2019-11-07 04:50:35,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:35,491 INFO L225 Difference]: With dead ends: 2370 [2019-11-07 04:50:35,491 INFO L226 Difference]: Without dead ends: 1290 [2019-11-07 04:50:35,495 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2019-11-07 04:50:35,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1272. [2019-11-07 04:50:35,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1272 states. [2019-11-07 04:50:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1682 transitions. [2019-11-07 04:50:35,563 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1682 transitions. Word has length 157 [2019-11-07 04:50:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:35,563 INFO L462 AbstractCegarLoop]: Abstraction has 1272 states and 1682 transitions. [2019-11-07 04:50:35,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:35,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1682 transitions. [2019-11-07 04:50:35,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-11-07 04:50:35,568 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:35,568 INFO L410 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, 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] [2019-11-07 04:50:35,568 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:35,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:35,569 INFO L82 PathProgramCache]: Analyzing trace with hash -229976780, now seen corresponding path program 1 times [2019-11-07 04:50:35,570 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:35,571 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124968742] [2019-11-07 04:50:35,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-07 04:50:35,704 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124968742] [2019-11-07 04:50:35,705 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:35,705 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:35,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251614299] [2019-11-07 04:50:35,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:35,711 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:35,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:35,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:35,712 INFO L87 Difference]: Start difference. First operand 1272 states and 1682 transitions. Second operand 3 states. [2019-11-07 04:50:35,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:35,887 INFO L93 Difference]: Finished difference Result 2652 states and 3552 transitions. [2019-11-07 04:50:35,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:35,887 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 176 [2019-11-07 04:50:35,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:35,894 INFO L225 Difference]: With dead ends: 2652 [2019-11-07 04:50:35,894 INFO L226 Difference]: Without dead ends: 1388 [2019-11-07 04:50:35,900 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:35,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2019-11-07 04:50:35,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1380. [2019-11-07 04:50:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1380 states. [2019-11-07 04:50:35,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 1802 transitions. [2019-11-07 04:50:35,944 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 1802 transitions. Word has length 176 [2019-11-07 04:50:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:35,944 INFO L462 AbstractCegarLoop]: Abstraction has 1380 states and 1802 transitions. [2019-11-07 04:50:35,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:35,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 1802 transitions. [2019-11-07 04:50:35,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-07 04:50:35,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:35,949 INFO L410 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, 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, 1] [2019-11-07 04:50:35,950 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:35,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1024383711, now seen corresponding path program 1 times [2019-11-07 04:50:35,950 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:35,951 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518832118] [2019-11-07 04:50:35,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-07 04:50:36,041 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518832118] [2019-11-07 04:50:36,041 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:50:36,042 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:50:36,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903969703] [2019-11-07 04:50:36,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:50:36,043 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:36,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:50:36,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:36,043 INFO L87 Difference]: Start difference. First operand 1380 states and 1802 transitions. Second operand 3 states. [2019-11-07 04:50:36,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:36,231 INFO L93 Difference]: Finished difference Result 2868 states and 3800 transitions. [2019-11-07 04:50:36,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:50:36,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 181 [2019-11-07 04:50:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:36,239 INFO L225 Difference]: With dead ends: 2868 [2019-11-07 04:50:36,240 INFO L226 Difference]: Without dead ends: 1496 [2019-11-07 04:50:36,243 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:50:36,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2019-11-07 04:50:36,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1496. [2019-11-07 04:50:36,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1496 states. [2019-11-07 04:50:36,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 1930 transitions. [2019-11-07 04:50:36,313 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 1930 transitions. Word has length 181 [2019-11-07 04:50:36,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:36,313 INFO L462 AbstractCegarLoop]: Abstraction has 1496 states and 1930 transitions. [2019-11-07 04:50:36,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:50:36,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 1930 transitions. [2019-11-07 04:50:36,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-11-07 04:50:36,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:36,319 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2019-11-07 04:50:36,319 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:36,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:36,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1787630570, now seen corresponding path program 1 times [2019-11-07 04:50:36,320 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:36,320 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437209156] [2019-11-07 04:50:36,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 303 proven. 25 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-11-07 04:50:36,432 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437209156] [2019-11-07 04:50:36,432 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364320471] [2019-11-07 04:50:36,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:50:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:36,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:50:36,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:50:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2019-11-07 04:50:36,732 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:50:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2019-11-07 04:50:36,852 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 04:50:36,852 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [4] total 7 [2019-11-07 04:50:36,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574885175] [2019-11-07 04:50:36,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:50:36,854 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:50:36,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:50:36,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:50:36,856 INFO L87 Difference]: Start difference. First operand 1496 states and 1930 transitions. Second operand 5 states. [2019-11-07 04:50:37,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:50:37,490 INFO L93 Difference]: Finished difference Result 3092 states and 3976 transitions. [2019-11-07 04:50:37,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 04:50:37,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 208 [2019-11-07 04:50:37,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:50:37,501 INFO L225 Difference]: With dead ends: 3092 [2019-11-07 04:50:37,501 INFO L226 Difference]: Without dead ends: 1440 [2019-11-07 04:50:37,509 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 413 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:50:37,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2019-11-07 04:50:37,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1390. [2019-11-07 04:50:37,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1390 states. [2019-11-07 04:50:37,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 1806 transitions. [2019-11-07 04:50:37,575 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 1806 transitions. Word has length 208 [2019-11-07 04:50:37,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:50:37,576 INFO L462 AbstractCegarLoop]: Abstraction has 1390 states and 1806 transitions. [2019-11-07 04:50:37,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:50:37,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 1806 transitions. [2019-11-07 04:50:37,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-11-07 04:50:37,585 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:50:37,585 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:50:37,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:50:37,791 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:50:37,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:50:37,792 INFO L82 PathProgramCache]: Analyzing trace with hash -311669261, now seen corresponding path program 1 times [2019-11-07 04:50:37,793 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:50:37,793 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460604933] [2019-11-07 04:50:37,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:50:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 442 proven. 25 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-11-07 04:50:38,025 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460604933] [2019-11-07 04:50:38,025 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492454061] [2019-11-07 04:50:38,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:50:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:50:38,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:50:38,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:50:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 442 proven. 25 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-11-07 04:50:38,296 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:50:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 442 proven. 25 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-11-07 04:50:38,405 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2032347569] [2019-11-07 04:50:38,491 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2019-11-07 04:50:38,491 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:50:38,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:50:38,523 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:50:38,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:50:38,610 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-11-07 04:50:38,616 INFO L197 IcfgInterpreter]: Interpreting procedure ssl3_accept with input of size 3 for LOIs [2019-11-07 04:50:39,362 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2019-11-07 04:50:39,783 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2019-11-07 04:50:39,996 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 201 [2019-11-07 04:50:42,133 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 269 [2019-11-07 04:50:42,368 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 270 [2019-11-07 04:50:43,616 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 276 [2019-11-07 04:50:45,805 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-11-07 04:50:45,806 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:50:46,701 WARN L191 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 150 [2019-11-07 04:50:47,359 WARN L191 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 145 [2019-11-07 04:50:48,026 WARN L191 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 145 [2019-11-07 04:50:48,758 WARN L191 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 148 [2019-11-07 04:50:49,500 WARN L191 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 151 [2019-11-07 04:50:50,281 WARN L191 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 154 [2019-11-07 04:50:51,143 WARN L191 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 157 [2019-11-07 04:50:51,884 WARN L191 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 149 [2019-11-07 04:50:52,627 WARN L191 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 152 [2019-11-07 04:50:53,400 WARN L191 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 155 [2019-11-07 04:50:54,190 WARN L191 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 158 [2019-11-07 04:50:54,940 WARN L191 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 147 [2019-11-07 04:50:55,741 WARN L191 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 152 [2019-11-07 04:50:56,476 WARN L191 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 146 [2019-11-07 04:50:57,216 WARN L191 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 148 [2019-11-07 04:50:57,960 WARN L191 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 149 [2019-11-07 04:50:58,721 WARN L191 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 152 [2019-11-07 04:50:59,485 WARN L191 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 148 [2019-11-07 04:51:00,272 WARN L191 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 151 [2019-11-07 04:51:01,107 WARN L191 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 155 [2019-11-07 04:51:02,024 WARN L191 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 158 [2019-11-07 04:51:02,871 WARN L191 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 148 [2019-11-07 04:51:03,690 WARN L191 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 150 [2019-11-07 04:51:04,522 WARN L191 SmtUtils]: Spent 733.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 156 [2019-11-07 04:51:05,424 WARN L191 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 161 [2019-11-07 04:51:06,338 WARN L191 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 164 [2019-11-07 04:51:07,236 WARN L191 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 148 [2019-11-07 04:51:08,261 WARN L191 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 164