/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:53:33,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:53:33,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:53:33,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:53:33,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:53:33,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:53:33,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:53:33,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:53:33,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:53:33,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:53:33,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:53:33,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:53:33,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:53:33,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:53:33,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:53:33,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:53:33,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:53:33,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:53:33,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:53:33,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:53:33,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:53:33,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:53:33,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:53:33,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:53:33,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:53:33,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 17:53:33,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 17:53:33,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 17:53:33,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 17:53:33,446 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 17:53:33,446 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 17:53:33,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 17:53:33,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 17:53:33,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:53:33,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:53:33,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:53:33,450 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 17:53:33,500 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:53:33,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:53:33,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:53:33,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:53:33,503 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:53:33,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:53:33,504 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:53:33,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:53:33,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:53:33,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:53:33,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:53:33,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:53:33,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:53:33,505 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:53:33,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:53:33,506 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:53:33,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:53:33,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:53:33,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:53:33,508 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:53:33,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:53:33,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:53:33,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:53:33,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:53:33,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:53:33,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:53:33,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:53:33,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:53:33,509 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:53:33,509 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:53:33,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:53:33,863 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:53:33,867 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:53:33,868 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:53:33,868 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:53:33,869 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-08-18 17:53:33,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e518032a/b1ab1744308d4c72890baba9c4908b52/FLAG9b5d67ac9 [2020-08-18 17:53:34,394 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:53:34,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c [2020-08-18 17:53:34,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e518032a/b1ab1744308d4c72890baba9c4908b52/FLAG9b5d67ac9 [2020-08-18 17:53:34,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e518032a/b1ab1744308d4c72890baba9c4908b52 [2020-08-18 17:53:34,742 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:53:34,744 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:53:34,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:53:34,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:53:34,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:53:34,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:53:34" (1/1) ... [2020-08-18 17:53:34,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1afef70d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:34, skipping insertion in model container [2020-08-18 17:53:34,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:53:34" (1/1) ... [2020-08-18 17:53:34,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:53:34,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:53:35,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:53:35,147 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:53:35,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:53:35,315 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:53:35,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:35 WrapperNode [2020-08-18 17:53:35,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:53:35,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:53:35,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:53:35,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:53:35,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:35" (1/1) ... [2020-08-18 17:53:35,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:35" (1/1) ... [2020-08-18 17:53:35,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:35" (1/1) ... [2020-08-18 17:53:35,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:35" (1/1) ... [2020-08-18 17:53:35,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:35" (1/1) ... [2020-08-18 17:53:35,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:35" (1/1) ... [2020-08-18 17:53:35,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:35" (1/1) ... [2020-08-18 17:53:35,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:53:35,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:53:35,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:53:35,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:53:35,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 17:53:35,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:53:35,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:53:35,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-18 17:53:35,438 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:53:35,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:53:35,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 17:53:35,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:53:35,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-18 17:53:35,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-08-18 17:53:35,439 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-18 17:53:35,440 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:53:35,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:53:35,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:53:35,661 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-18 17:53:36,246 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-18 17:53:36,247 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-18 17:53:36,258 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:53:36,259 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 17:53:36,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:53:36 BoogieIcfgContainer [2020-08-18 17:53:36,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:53:36,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:53:36,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:53:36,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:53:36,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:53:34" (1/3) ... [2020-08-18 17:53:36,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e65ae1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:53:36, skipping insertion in model container [2020-08-18 17:53:36,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:35" (2/3) ... [2020-08-18 17:53:36,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e65ae1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:53:36, skipping insertion in model container [2020-08-18 17:53:36,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:53:36" (3/3) ... [2020-08-18 17:53:36,275 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_12.cil.c [2020-08-18 17:53:36,285 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:53:36,294 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:53:36,309 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:53:36,336 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:53:36,337 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:53:36,337 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:53:36,337 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:53:36,338 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:53:36,338 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:53:36,338 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:53:36,338 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:53:36,364 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states. [2020-08-18 17:53:36,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 17:53:36,373 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:36,374 INFO L422 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] [2020-08-18 17:53:36,375 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:36,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:36,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1312867208, now seen corresponding path program 1 times [2020-08-18 17:53:36,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:36,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172995207] [2020-08-18 17:53:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:36,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:36,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172995207] [2020-08-18 17:53:36,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:36,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:36,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476582752] [2020-08-18 17:53:36,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:36,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:36,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:36,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:36,749 INFO L87 Difference]: Start difference. First operand 175 states. Second operand 5 states. [2020-08-18 17:53:37,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:37,069 INFO L93 Difference]: Finished difference Result 362 states and 623 transitions. [2020-08-18 17:53:37,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:37,071 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-18 17:53:37,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:37,085 INFO L225 Difference]: With dead ends: 362 [2020-08-18 17:53:37,086 INFO L226 Difference]: Without dead ends: 179 [2020-08-18 17:53:37,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:37,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-08-18 17:53:37,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-08-18 17:53:37,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-18 17:53:37,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 282 transitions. [2020-08-18 17:53:37,148 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 282 transitions. Word has length 33 [2020-08-18 17:53:37,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:37,149 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 282 transitions. [2020-08-18 17:53:37,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:37,149 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 282 transitions. [2020-08-18 17:53:37,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 17:53:37,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:37,152 INFO L422 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] [2020-08-18 17:53:37,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:53:37,152 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:37,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:37,153 INFO L82 PathProgramCache]: Analyzing trace with hash -564854069, now seen corresponding path program 1 times [2020-08-18 17:53:37,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:37,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897556981] [2020-08-18 17:53:37,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:37,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:37,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897556981] [2020-08-18 17:53:37,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:37,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:37,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231579393] [2020-08-18 17:53:37,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:37,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:37,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:37,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:37,251 INFO L87 Difference]: Start difference. First operand 177 states and 282 transitions. Second operand 5 states. [2020-08-18 17:53:37,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:37,478 INFO L93 Difference]: Finished difference Result 363 states and 580 transitions. [2020-08-18 17:53:37,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:37,479 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-18 17:53:37,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:37,481 INFO L225 Difference]: With dead ends: 363 [2020-08-18 17:53:37,481 INFO L226 Difference]: Without dead ends: 199 [2020-08-18 17:53:37,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:37,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-08-18 17:53:37,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2020-08-18 17:53:37,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-08-18 17:53:37,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 312 transitions. [2020-08-18 17:53:37,514 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 312 transitions. Word has length 34 [2020-08-18 17:53:37,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:37,515 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 312 transitions. [2020-08-18 17:53:37,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:37,515 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 312 transitions. [2020-08-18 17:53:37,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 17:53:37,517 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:37,517 INFO L422 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] [2020-08-18 17:53:37,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:53:37,518 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:37,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:37,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2005409376, now seen corresponding path program 1 times [2020-08-18 17:53:37,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:37,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671619130] [2020-08-18 17:53:37,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:37,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:37,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671619130] [2020-08-18 17:53:37,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:37,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:37,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208211507] [2020-08-18 17:53:37,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:37,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:37,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:37,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:37,669 INFO L87 Difference]: Start difference. First operand 199 states and 312 transitions. Second operand 5 states. [2020-08-18 17:53:37,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:37,945 INFO L93 Difference]: Finished difference Result 393 states and 621 transitions. [2020-08-18 17:53:37,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:37,946 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-18 17:53:37,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:37,949 INFO L225 Difference]: With dead ends: 393 [2020-08-18 17:53:37,949 INFO L226 Difference]: Without dead ends: 207 [2020-08-18 17:53:37,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-08-18 17:53:37,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2020-08-18 17:53:37,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-08-18 17:53:37,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 323 transitions. [2020-08-18 17:53:37,990 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 323 transitions. Word has length 34 [2020-08-18 17:53:37,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:37,990 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 323 transitions. [2020-08-18 17:53:37,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:37,991 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 323 transitions. [2020-08-18 17:53:37,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 17:53:37,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:37,995 INFO L422 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] [2020-08-18 17:53:37,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:53:37,996 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:37,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:37,996 INFO L82 PathProgramCache]: Analyzing trace with hash 473070591, now seen corresponding path program 1 times [2020-08-18 17:53:37,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:37,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664260543] [2020-08-18 17:53:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:38,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:38,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664260543] [2020-08-18 17:53:38,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:38,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:38,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761437708] [2020-08-18 17:53:38,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:38,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:38,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:38,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:38,094 INFO L87 Difference]: Start difference. First operand 205 states and 323 transitions. Second operand 5 states. [2020-08-18 17:53:38,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:38,320 INFO L93 Difference]: Finished difference Result 398 states and 631 transitions. [2020-08-18 17:53:38,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:38,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-18 17:53:38,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:38,323 INFO L225 Difference]: With dead ends: 398 [2020-08-18 17:53:38,323 INFO L226 Difference]: Without dead ends: 206 [2020-08-18 17:53:38,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:38,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-08-18 17:53:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-08-18 17:53:38,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-18 17:53:38,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 324 transitions. [2020-08-18 17:53:38,350 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 324 transitions. Word has length 34 [2020-08-18 17:53:38,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:38,350 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 324 transitions. [2020-08-18 17:53:38,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:38,351 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 324 transitions. [2020-08-18 17:53:38,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-18 17:53:38,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:38,353 INFO L422 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] [2020-08-18 17:53:38,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:53:38,354 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:38,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:38,354 INFO L82 PathProgramCache]: Analyzing trace with hash 715486203, now seen corresponding path program 1 times [2020-08-18 17:53:38,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:38,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763159831] [2020-08-18 17:53:38,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:38,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:38,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763159831] [2020-08-18 17:53:38,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:38,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:38,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359760694] [2020-08-18 17:53:38,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:38,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:38,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:38,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:38,460 INFO L87 Difference]: Start difference. First operand 206 states and 324 transitions. Second operand 5 states. [2020-08-18 17:53:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:38,657 INFO L93 Difference]: Finished difference Result 409 states and 643 transitions. [2020-08-18 17:53:38,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:38,658 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-08-18 17:53:38,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:38,659 INFO L225 Difference]: With dead ends: 409 [2020-08-18 17:53:38,660 INFO L226 Difference]: Without dead ends: 216 [2020-08-18 17:53:38,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:38,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-18 17:53:38,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-08-18 17:53:38,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-18 17:53:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 322 transitions. [2020-08-18 17:53:38,676 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 322 transitions. Word has length 35 [2020-08-18 17:53:38,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:38,678 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 322 transitions. [2020-08-18 17:53:38,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:38,678 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 322 transitions. [2020-08-18 17:53:38,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-18 17:53:38,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:38,684 INFO L422 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] [2020-08-18 17:53:38,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:53:38,685 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:38,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:38,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1092720099, now seen corresponding path program 1 times [2020-08-18 17:53:38,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:38,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312997168] [2020-08-18 17:53:38,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:38,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:38,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312997168] [2020-08-18 17:53:38,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:38,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:38,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411697802] [2020-08-18 17:53:38,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:38,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:38,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:38,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:38,774 INFO L87 Difference]: Start difference. First operand 206 states and 322 transitions. Second operand 5 states. [2020-08-18 17:53:38,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:38,989 INFO L93 Difference]: Finished difference Result 409 states and 639 transitions. [2020-08-18 17:53:38,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:38,991 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-08-18 17:53:38,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:38,993 INFO L225 Difference]: With dead ends: 409 [2020-08-18 17:53:38,993 INFO L226 Difference]: Without dead ends: 216 [2020-08-18 17:53:38,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:39,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-18 17:53:39,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-08-18 17:53:39,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-18 17:53:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 320 transitions. [2020-08-18 17:53:39,014 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 320 transitions. Word has length 36 [2020-08-18 17:53:39,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:39,015 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 320 transitions. [2020-08-18 17:53:39,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:39,016 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 320 transitions. [2020-08-18 17:53:39,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 17:53:39,017 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:39,017 INFO L422 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] [2020-08-18 17:53:39,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:53:39,017 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:39,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:39,018 INFO L82 PathProgramCache]: Analyzing trace with hash 958823552, now seen corresponding path program 1 times [2020-08-18 17:53:39,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:39,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239489020] [2020-08-18 17:53:39,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:39,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:39,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239489020] [2020-08-18 17:53:39,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:39,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:39,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523666335] [2020-08-18 17:53:39,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:39,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:39,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:39,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:39,094 INFO L87 Difference]: Start difference. First operand 206 states and 320 transitions. Second operand 5 states. [2020-08-18 17:53:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:39,276 INFO L93 Difference]: Finished difference Result 409 states and 635 transitions. [2020-08-18 17:53:39,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:39,276 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-08-18 17:53:39,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:39,278 INFO L225 Difference]: With dead ends: 409 [2020-08-18 17:53:39,278 INFO L226 Difference]: Without dead ends: 216 [2020-08-18 17:53:39,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:39,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-08-18 17:53:39,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206. [2020-08-18 17:53:39,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-18 17:53:39,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 318 transitions. [2020-08-18 17:53:39,292 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 318 transitions. Word has length 37 [2020-08-18 17:53:39,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:39,293 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 318 transitions. [2020-08-18 17:53:39,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:39,293 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 318 transitions. [2020-08-18 17:53:39,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-18 17:53:39,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:39,296 INFO L422 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] [2020-08-18 17:53:39,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:53:39,297 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:39,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:39,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1433612927, now seen corresponding path program 1 times [2020-08-18 17:53:39,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:39,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404658091] [2020-08-18 17:53:39,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:39,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:39,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404658091] [2020-08-18 17:53:39,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:39,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 17:53:39,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508931429] [2020-08-18 17:53:39,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:53:39,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:39,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:53:39,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:39,385 INFO L87 Difference]: Start difference. First operand 206 states and 318 transitions. Second operand 6 states. [2020-08-18 17:53:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:39,777 INFO L93 Difference]: Finished difference Result 605 states and 935 transitions. [2020-08-18 17:53:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 17:53:39,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-08-18 17:53:39,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:39,781 INFO L225 Difference]: With dead ends: 605 [2020-08-18 17:53:39,782 INFO L226 Difference]: Without dead ends: 412 [2020-08-18 17:53:39,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:53:39,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2020-08-18 17:53:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 388. [2020-08-18 17:53:39,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-08-18 17:53:39,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 600 transitions. [2020-08-18 17:53:39,811 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 600 transitions. Word has length 37 [2020-08-18 17:53:39,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:39,811 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 600 transitions. [2020-08-18 17:53:39,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:53:39,812 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 600 transitions. [2020-08-18 17:53:39,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 17:53:39,813 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:39,813 INFO L422 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, 1, 1, 1, 1] [2020-08-18 17:53:39,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:53:39,814 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:39,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:39,814 INFO L82 PathProgramCache]: Analyzing trace with hash 2018661528, now seen corresponding path program 1 times [2020-08-18 17:53:39,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:39,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783541516] [2020-08-18 17:53:39,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:39,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:39,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783541516] [2020-08-18 17:53:39,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:39,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:39,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8845411] [2020-08-18 17:53:39,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:39,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:39,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:39,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:39,892 INFO L87 Difference]: Start difference. First operand 388 states and 600 transitions. Second operand 5 states. [2020-08-18 17:53:40,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:40,188 INFO L93 Difference]: Finished difference Result 847 states and 1329 transitions. [2020-08-18 17:53:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:40,189 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2020-08-18 17:53:40,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:40,197 INFO L225 Difference]: With dead ends: 847 [2020-08-18 17:53:40,198 INFO L226 Difference]: Without dead ends: 472 [2020-08-18 17:53:40,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:40,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-18 17:53:40,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 454. [2020-08-18 17:53:40,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-08-18 17:53:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 715 transitions. [2020-08-18 17:53:40,225 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 715 transitions. Word has length 49 [2020-08-18 17:53:40,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:40,225 INFO L479 AbstractCegarLoop]: Abstraction has 454 states and 715 transitions. [2020-08-18 17:53:40,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:40,226 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 715 transitions. [2020-08-18 17:53:40,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-18 17:53:40,227 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:40,227 INFO L422 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, 1, 1, 1, 1, 1] [2020-08-18 17:53:40,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:53:40,228 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:40,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:40,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1742182651, now seen corresponding path program 1 times [2020-08-18 17:53:40,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:40,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670316886] [2020-08-18 17:53:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:40,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:40,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670316886] [2020-08-18 17:53:40,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:40,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:40,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089130217] [2020-08-18 17:53:40,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:40,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:40,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:40,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:40,320 INFO L87 Difference]: Start difference. First operand 454 states and 715 transitions. Second operand 5 states. [2020-08-18 17:53:40,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:40,624 INFO L93 Difference]: Finished difference Result 936 states and 1487 transitions. [2020-08-18 17:53:40,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:40,625 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-08-18 17:53:40,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:40,629 INFO L225 Difference]: With dead ends: 936 [2020-08-18 17:53:40,629 INFO L226 Difference]: Without dead ends: 495 [2020-08-18 17:53:40,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-18 17:53:40,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 477. [2020-08-18 17:53:40,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-08-18 17:53:40,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 758 transitions. [2020-08-18 17:53:40,676 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 758 transitions. Word has length 50 [2020-08-18 17:53:40,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:40,676 INFO L479 AbstractCegarLoop]: Abstraction has 477 states and 758 transitions. [2020-08-18 17:53:40,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:40,677 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 758 transitions. [2020-08-18 17:53:40,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 17:53:40,678 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:40,678 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 17:53:40,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:53:40,679 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:40,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:40,679 INFO L82 PathProgramCache]: Analyzing trace with hash 928180771, now seen corresponding path program 1 times [2020-08-18 17:53:40,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:40,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546099358] [2020-08-18 17:53:40,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:40,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 17:53:40,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546099358] [2020-08-18 17:53:40,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:40,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:40,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610051414] [2020-08-18 17:53:40,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:40,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:40,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:40,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:40,762 INFO L87 Difference]: Start difference. First operand 477 states and 758 transitions. Second operand 5 states. [2020-08-18 17:53:41,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:41,002 INFO L93 Difference]: Finished difference Result 993 states and 1583 transitions. [2020-08-18 17:53:41,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:41,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2020-08-18 17:53:41,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:41,006 INFO L225 Difference]: With dead ends: 993 [2020-08-18 17:53:41,007 INFO L226 Difference]: Without dead ends: 529 [2020-08-18 17:53:41,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:41,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-08-18 17:53:41,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511. [2020-08-18 17:53:41,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-08-18 17:53:41,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 809 transitions. [2020-08-18 17:53:41,035 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 809 transitions. Word has length 61 [2020-08-18 17:53:41,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:41,035 INFO L479 AbstractCegarLoop]: Abstraction has 511 states and 809 transitions. [2020-08-18 17:53:41,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:41,036 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 809 transitions. [2020-08-18 17:53:41,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 17:53:41,037 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:41,037 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 17:53:41,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:53:41,038 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:41,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:41,038 INFO L82 PathProgramCache]: Analyzing trace with hash 171040523, now seen corresponding path program 1 times [2020-08-18 17:53:41,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:41,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4647430] [2020-08-18 17:53:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:41,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 17:53:41,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4647430] [2020-08-18 17:53:41,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:41,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:41,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262826221] [2020-08-18 17:53:41,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:41,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:41,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:41,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:41,094 INFO L87 Difference]: Start difference. First operand 511 states and 809 transitions. Second operand 5 states. [2020-08-18 17:53:41,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:41,351 INFO L93 Difference]: Finished difference Result 1027 states and 1631 transitions. [2020-08-18 17:53:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:41,352 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-08-18 17:53:41,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:41,355 INFO L225 Difference]: With dead ends: 1027 [2020-08-18 17:53:41,355 INFO L226 Difference]: Without dead ends: 529 [2020-08-18 17:53:41,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-08-18 17:53:41,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511. [2020-08-18 17:53:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-08-18 17:53:41,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 806 transitions. [2020-08-18 17:53:41,385 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 806 transitions. Word has length 62 [2020-08-18 17:53:41,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:41,386 INFO L479 AbstractCegarLoop]: Abstraction has 511 states and 806 transitions. [2020-08-18 17:53:41,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:41,386 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 806 transitions. [2020-08-18 17:53:41,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 17:53:41,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:41,388 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-08-18 17:53:41,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:53:41,388 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:41,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:41,389 INFO L82 PathProgramCache]: Analyzing trace with hash 2117537729, now seen corresponding path program 1 times [2020-08-18 17:53:41,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:41,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790265853] [2020-08-18 17:53:41,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:41,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 17:53:41,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790265853] [2020-08-18 17:53:41,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:41,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:41,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91130774] [2020-08-18 17:53:41,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:41,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:41,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:41,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:41,463 INFO L87 Difference]: Start difference. First operand 511 states and 806 transitions. Second operand 5 states. [2020-08-18 17:53:41,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:41,734 INFO L93 Difference]: Finished difference Result 1074 states and 1702 transitions. [2020-08-18 17:53:41,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:41,735 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-08-18 17:53:41,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:41,738 INFO L225 Difference]: With dead ends: 1074 [2020-08-18 17:53:41,738 INFO L226 Difference]: Without dead ends: 576 [2020-08-18 17:53:41,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:41,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2020-08-18 17:53:41,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574. [2020-08-18 17:53:41,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2020-08-18 17:53:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 903 transitions. [2020-08-18 17:53:41,769 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 903 transitions. Word has length 62 [2020-08-18 17:53:41,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:41,770 INFO L479 AbstractCegarLoop]: Abstraction has 574 states and 903 transitions. [2020-08-18 17:53:41,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:41,770 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 903 transitions. [2020-08-18 17:53:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-18 17:53:41,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:41,772 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:41,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 17:53:41,772 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:41,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:41,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1816844012, now seen corresponding path program 1 times [2020-08-18 17:53:41,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:41,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129459147] [2020-08-18 17:53:41,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:41,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:41,828 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:41,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129459147] [2020-08-18 17:53:41,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:41,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:41,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965462775] [2020-08-18 17:53:41,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:41,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:41,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:41,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:41,830 INFO L87 Difference]: Start difference. First operand 574 states and 903 transitions. Second operand 5 states. [2020-08-18 17:53:42,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:42,089 INFO L93 Difference]: Finished difference Result 1184 states and 1864 transitions. [2020-08-18 17:53:42,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:42,090 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-08-18 17:53:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:42,093 INFO L225 Difference]: With dead ends: 1184 [2020-08-18 17:53:42,093 INFO L226 Difference]: Without dead ends: 623 [2020-08-18 17:53:42,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:42,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-08-18 17:53:42,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617. [2020-08-18 17:53:42,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-18 17:53:42,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 967 transitions. [2020-08-18 17:53:42,123 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 967 transitions. Word has length 84 [2020-08-18 17:53:42,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:42,124 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 967 transitions. [2020-08-18 17:53:42,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:42,124 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 967 transitions. [2020-08-18 17:53:42,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 17:53:42,128 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:42,128 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 17:53:42,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 17:53:42,129 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:42,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:42,129 INFO L82 PathProgramCache]: Analyzing trace with hash -584276215, now seen corresponding path program 1 times [2020-08-18 17:53:42,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:42,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591513327] [2020-08-18 17:53:42,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:42,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:42,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591513327] [2020-08-18 17:53:42,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:42,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:42,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077465305] [2020-08-18 17:53:42,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:42,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:42,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:42,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:42,199 INFO L87 Difference]: Start difference. First operand 617 states and 967 transitions. Second operand 5 states. [2020-08-18 17:53:42,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:42,455 INFO L93 Difference]: Finished difference Result 1227 states and 1925 transitions. [2020-08-18 17:53:42,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:42,456 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-08-18 17:53:42,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:42,460 INFO L225 Difference]: With dead ends: 1227 [2020-08-18 17:53:42,460 INFO L226 Difference]: Without dead ends: 623 [2020-08-18 17:53:42,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:42,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-08-18 17:53:42,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617. [2020-08-18 17:53:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-18 17:53:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 964 transitions. [2020-08-18 17:53:42,492 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 964 transitions. Word has length 85 [2020-08-18 17:53:42,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:42,492 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 964 transitions. [2020-08-18 17:53:42,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:42,492 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 964 transitions. [2020-08-18 17:53:42,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-18 17:53:42,494 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:42,495 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:42,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 17:53:42,495 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:42,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:42,495 INFO L82 PathProgramCache]: Analyzing trace with hash 220190302, now seen corresponding path program 1 times [2020-08-18 17:53:42,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:42,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547584916] [2020-08-18 17:53:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:42,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 17:53:42,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547584916] [2020-08-18 17:53:42,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:42,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:42,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41111860] [2020-08-18 17:53:42,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:42,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:42,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:42,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:42,576 INFO L87 Difference]: Start difference. First operand 617 states and 964 transitions. Second operand 5 states. [2020-08-18 17:53:42,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:42,846 INFO L93 Difference]: Finished difference Result 1223 states and 1913 transitions. [2020-08-18 17:53:42,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:42,846 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2020-08-18 17:53:42,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:42,850 INFO L225 Difference]: With dead ends: 1223 [2020-08-18 17:53:42,850 INFO L226 Difference]: Without dead ends: 619 [2020-08-18 17:53:42,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:42,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2020-08-18 17:53:42,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 617. [2020-08-18 17:53:42,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-08-18 17:53:42,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 959 transitions. [2020-08-18 17:53:42,883 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 959 transitions. Word has length 90 [2020-08-18 17:53:42,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:42,884 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 959 transitions. [2020-08-18 17:53:42,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:42,884 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 959 transitions. [2020-08-18 17:53:42,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-18 17:53:42,886 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:42,886 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:42,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 17:53:42,887 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:42,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:42,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1890073075, now seen corresponding path program 1 times [2020-08-18 17:53:42,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:42,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203913739] [2020-08-18 17:53:42,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:42,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-08-18 17:53:42,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203913739] [2020-08-18 17:53:42,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:42,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:42,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796458074] [2020-08-18 17:53:42,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:42,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:42,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:42,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:42,951 INFO L87 Difference]: Start difference. First operand 617 states and 959 transitions. Second operand 5 states. [2020-08-18 17:53:43,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:43,193 INFO L93 Difference]: Finished difference Result 1281 states and 1996 transitions. [2020-08-18 17:53:43,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:43,194 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 98 [2020-08-18 17:53:43,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:43,198 INFO L225 Difference]: With dead ends: 1281 [2020-08-18 17:53:43,198 INFO L226 Difference]: Without dead ends: 677 [2020-08-18 17:53:43,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:43,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-08-18 17:53:43,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649. [2020-08-18 17:53:43,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-08-18 17:53:43,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1002 transitions. [2020-08-18 17:53:43,237 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1002 transitions. Word has length 98 [2020-08-18 17:53:43,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:43,237 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 1002 transitions. [2020-08-18 17:53:43,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:43,238 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1002 transitions. [2020-08-18 17:53:43,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-18 17:53:43,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:43,240 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:43,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 17:53:43,241 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:43,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:43,241 INFO L82 PathProgramCache]: Analyzing trace with hash -90077499, now seen corresponding path program 1 times [2020-08-18 17:53:43,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:43,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148312251] [2020-08-18 17:53:43,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:43,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-08-18 17:53:43,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148312251] [2020-08-18 17:53:43,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:43,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:43,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975859088] [2020-08-18 17:53:43,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:43,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:43,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:43,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:43,312 INFO L87 Difference]: Start difference. First operand 649 states and 1002 transitions. Second operand 5 states. [2020-08-18 17:53:43,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:43,605 INFO L93 Difference]: Finished difference Result 1313 states and 2033 transitions. [2020-08-18 17:53:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:43,606 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-08-18 17:53:43,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:43,610 INFO L225 Difference]: With dead ends: 1313 [2020-08-18 17:53:43,610 INFO L226 Difference]: Without dead ends: 677 [2020-08-18 17:53:43,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:43,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2020-08-18 17:53:43,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649. [2020-08-18 17:53:43,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2020-08-18 17:53:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 996 transitions. [2020-08-18 17:53:43,665 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 996 transitions. Word has length 99 [2020-08-18 17:53:43,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:43,665 INFO L479 AbstractCegarLoop]: Abstraction has 649 states and 996 transitions. [2020-08-18 17:53:43,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:43,666 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 996 transitions. [2020-08-18 17:53:43,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-08-18 17:53:43,669 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:43,672 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:43,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 17:53:43,673 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:43,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:43,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1708621622, now seen corresponding path program 1 times [2020-08-18 17:53:43,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:43,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077658928] [2020-08-18 17:53:43,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:43,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 17:53:43,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077658928] [2020-08-18 17:53:43,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:43,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:43,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585529678] [2020-08-18 17:53:43,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:43,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:43,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:43,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:43,761 INFO L87 Difference]: Start difference. First operand 649 states and 996 transitions. Second operand 5 states. [2020-08-18 17:53:44,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:44,091 INFO L93 Difference]: Finished difference Result 1349 states and 2073 transitions. [2020-08-18 17:53:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:44,092 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-08-18 17:53:44,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:44,096 INFO L225 Difference]: With dead ends: 1349 [2020-08-18 17:53:44,097 INFO L226 Difference]: Without dead ends: 713 [2020-08-18 17:53:44,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:44,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-08-18 17:53:44,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 701. [2020-08-18 17:53:44,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 701 states. [2020-08-18 17:53:44,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1072 transitions. [2020-08-18 17:53:44,155 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1072 transitions. Word has length 105 [2020-08-18 17:53:44,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:44,155 INFO L479 AbstractCegarLoop]: Abstraction has 701 states and 1072 transitions. [2020-08-18 17:53:44,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:44,155 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1072 transitions. [2020-08-18 17:53:44,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-18 17:53:44,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:44,158 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:44,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 17:53:44,159 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:44,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:44,159 INFO L82 PathProgramCache]: Analyzing trace with hash 2058755821, now seen corresponding path program 1 times [2020-08-18 17:53:44,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:44,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612425760] [2020-08-18 17:53:44,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 17:53:44,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612425760] [2020-08-18 17:53:44,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:44,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:44,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577598093] [2020-08-18 17:53:44,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:44,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:44,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:44,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:44,254 INFO L87 Difference]: Start difference. First operand 701 states and 1072 transitions. Second operand 5 states. [2020-08-18 17:53:44,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:44,570 INFO L93 Difference]: Finished difference Result 1406 states and 2155 transitions. [2020-08-18 17:53:44,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:44,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-08-18 17:53:44,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:44,576 INFO L225 Difference]: With dead ends: 1406 [2020-08-18 17:53:44,576 INFO L226 Difference]: Without dead ends: 714 [2020-08-18 17:53:44,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:44,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-18 17:53:44,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 702. [2020-08-18 17:53:44,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 702 states. [2020-08-18 17:53:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1073 transitions. [2020-08-18 17:53:44,627 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1073 transitions. Word has length 106 [2020-08-18 17:53:44,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:44,628 INFO L479 AbstractCegarLoop]: Abstraction has 702 states and 1073 transitions. [2020-08-18 17:53:44,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:44,628 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1073 transitions. [2020-08-18 17:53:44,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-08-18 17:53:44,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:44,632 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-08-18 17:53:44,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 17:53:44,632 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:44,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:44,633 INFO L82 PathProgramCache]: Analyzing trace with hash 646120304, now seen corresponding path program 1 times [2020-08-18 17:53:44,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:44,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233438909] [2020-08-18 17:53:44,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-08-18 17:53:44,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233438909] [2020-08-18 17:53:44,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:44,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:44,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012620518] [2020-08-18 17:53:44,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:44,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:44,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:44,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:44,730 INFO L87 Difference]: Start difference. First operand 702 states and 1073 transitions. Second operand 5 states. [2020-08-18 17:53:44,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:44,999 INFO L93 Difference]: Finished difference Result 1438 states and 2197 transitions. [2020-08-18 17:53:45,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:45,000 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2020-08-18 17:53:45,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:45,004 INFO L225 Difference]: With dead ends: 1438 [2020-08-18 17:53:45,005 INFO L226 Difference]: Without dead ends: 749 [2020-08-18 17:53:45,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:45,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-08-18 17:53:45,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2020-08-18 17:53:45,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-08-18 17:53:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1128 transitions. [2020-08-18 17:53:45,048 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1128 transitions. Word has length 117 [2020-08-18 17:53:45,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:45,048 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 1128 transitions. [2020-08-18 17:53:45,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:45,048 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1128 transitions. [2020-08-18 17:53:45,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-18 17:53:45,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:45,051 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:45,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 17:53:45,051 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:45,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:45,052 INFO L82 PathProgramCache]: Analyzing trace with hash 820078483, now seen corresponding path program 1 times [2020-08-18 17:53:45,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:45,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577542413] [2020-08-18 17:53:45,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-08-18 17:53:45,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577542413] [2020-08-18 17:53:45,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:45,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:45,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35285878] [2020-08-18 17:53:45,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:45,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:45,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:45,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:45,140 INFO L87 Difference]: Start difference. First operand 743 states and 1128 transitions. Second operand 5 states. [2020-08-18 17:53:45,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:45,410 INFO L93 Difference]: Finished difference Result 1479 states and 2247 transitions. [2020-08-18 17:53:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:45,410 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-08-18 17:53:45,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:45,414 INFO L225 Difference]: With dead ends: 1479 [2020-08-18 17:53:45,414 INFO L226 Difference]: Without dead ends: 749 [2020-08-18 17:53:45,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:45,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-08-18 17:53:45,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743. [2020-08-18 17:53:45,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 743 states. [2020-08-18 17:53:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1123 transitions. [2020-08-18 17:53:45,455 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1123 transitions. Word has length 118 [2020-08-18 17:53:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:45,455 INFO L479 AbstractCegarLoop]: Abstraction has 743 states and 1123 transitions. [2020-08-18 17:53:45,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:45,456 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1123 transitions. [2020-08-18 17:53:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-08-18 17:53:45,457 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:45,458 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:45,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 17:53:45,458 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:45,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:45,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1832218007, now seen corresponding path program 1 times [2020-08-18 17:53:45,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:45,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018177404] [2020-08-18 17:53:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-08-18 17:53:45,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018177404] [2020-08-18 17:53:45,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:45,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:45,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032349174] [2020-08-18 17:53:45,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:45,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:45,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:45,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:45,526 INFO L87 Difference]: Start difference. First operand 743 states and 1123 transitions. Second operand 5 states. [2020-08-18 17:53:45,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:45,776 INFO L93 Difference]: Finished difference Result 1515 states and 2290 transitions. [2020-08-18 17:53:45,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:45,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-08-18 17:53:45,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:45,780 INFO L225 Difference]: With dead ends: 1515 [2020-08-18 17:53:45,780 INFO L226 Difference]: Without dead ends: 785 [2020-08-18 17:53:45,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:45,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-08-18 17:53:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775. [2020-08-18 17:53:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-08-18 17:53:45,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1161 transitions. [2020-08-18 17:53:45,824 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1161 transitions. Word has length 120 [2020-08-18 17:53:45,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:45,825 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1161 transitions. [2020-08-18 17:53:45,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:45,825 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1161 transitions. [2020-08-18 17:53:45,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 17:53:45,827 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:45,827 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-08-18 17:53:45,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 17:53:45,828 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:45,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:45,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2144394689, now seen corresponding path program 1 times [2020-08-18 17:53:45,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:45,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638230370] [2020-08-18 17:53:45,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-08-18 17:53:45,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638230370] [2020-08-18 17:53:45,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:45,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:45,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153707735] [2020-08-18 17:53:45,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:45,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:45,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:45,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:45,921 INFO L87 Difference]: Start difference. First operand 775 states and 1161 transitions. Second operand 5 states. [2020-08-18 17:53:46,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:46,193 INFO L93 Difference]: Finished difference Result 1547 states and 2319 transitions. [2020-08-18 17:53:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:46,194 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-08-18 17:53:46,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:46,197 INFO L225 Difference]: With dead ends: 1547 [2020-08-18 17:53:46,197 INFO L226 Difference]: Without dead ends: 785 [2020-08-18 17:53:46,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:46,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2020-08-18 17:53:46,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775. [2020-08-18 17:53:46,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-08-18 17:53:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1152 transitions. [2020-08-18 17:53:46,244 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1152 transitions. Word has length 121 [2020-08-18 17:53:46,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:46,245 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1152 transitions. [2020-08-18 17:53:46,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:46,245 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1152 transitions. [2020-08-18 17:53:46,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-08-18 17:53:46,248 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:46,248 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:46,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 17:53:46,248 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:46,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:46,252 INFO L82 PathProgramCache]: Analyzing trace with hash -40343791, now seen corresponding path program 1 times [2020-08-18 17:53:46,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:46,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126548733] [2020-08-18 17:53:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-08-18 17:53:46,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126548733] [2020-08-18 17:53:46,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:46,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:46,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680330879] [2020-08-18 17:53:46,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:46,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:46,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:46,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:46,349 INFO L87 Difference]: Start difference. First operand 775 states and 1152 transitions. Second operand 5 states. [2020-08-18 17:53:46,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:46,575 INFO L93 Difference]: Finished difference Result 1573 states and 2340 transitions. [2020-08-18 17:53:46,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:46,576 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2020-08-18 17:53:46,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:46,580 INFO L225 Difference]: With dead ends: 1573 [2020-08-18 17:53:46,580 INFO L226 Difference]: Without dead ends: 811 [2020-08-18 17:53:46,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:46,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-08-18 17:53:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803. [2020-08-18 17:53:46,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2020-08-18 17:53:46,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1183 transitions. [2020-08-18 17:53:46,622 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1183 transitions. Word has length 142 [2020-08-18 17:53:46,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:46,622 INFO L479 AbstractCegarLoop]: Abstraction has 803 states and 1183 transitions. [2020-08-18 17:53:46,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:46,622 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1183 transitions. [2020-08-18 17:53:46,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-18 17:53:46,626 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:46,626 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:46,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 17:53:46,627 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:46,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:46,627 INFO L82 PathProgramCache]: Analyzing trace with hash -46422775, now seen corresponding path program 1 times [2020-08-18 17:53:46,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:46,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883459727] [2020-08-18 17:53:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:46,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,690 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-08-18 17:53:46,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883459727] [2020-08-18 17:53:46,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:46,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:46,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497866039] [2020-08-18 17:53:46,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:46,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:46,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:46,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:46,695 INFO L87 Difference]: Start difference. First operand 803 states and 1183 transitions. Second operand 5 states. [2020-08-18 17:53:46,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:46,937 INFO L93 Difference]: Finished difference Result 1601 states and 2361 transitions. [2020-08-18 17:53:46,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:46,938 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2020-08-18 17:53:46,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:46,942 INFO L225 Difference]: With dead ends: 1601 [2020-08-18 17:53:46,942 INFO L226 Difference]: Without dead ends: 811 [2020-08-18 17:53:46,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:46,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2020-08-18 17:53:46,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803. [2020-08-18 17:53:46,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2020-08-18 17:53:46,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1173 transitions. [2020-08-18 17:53:46,983 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1173 transitions. Word has length 143 [2020-08-18 17:53:46,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:46,984 INFO L479 AbstractCegarLoop]: Abstraction has 803 states and 1173 transitions. [2020-08-18 17:53:46,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:46,984 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1173 transitions. [2020-08-18 17:53:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-18 17:53:46,986 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:46,987 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:46,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 17:53:46,987 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:46,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:46,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1282567469, now seen corresponding path program 1 times [2020-08-18 17:53:46,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:46,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061668894] [2020-08-18 17:53:46,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-08-18 17:53:47,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061668894] [2020-08-18 17:53:47,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:47,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:47,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721061105] [2020-08-18 17:53:47,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:47,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:47,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:47,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:47,079 INFO L87 Difference]: Start difference. First operand 803 states and 1173 transitions. Second operand 5 states. [2020-08-18 17:53:47,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:47,349 INFO L93 Difference]: Finished difference Result 1656 states and 2415 transitions. [2020-08-18 17:53:47,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:47,350 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-08-18 17:53:47,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:47,355 INFO L225 Difference]: With dead ends: 1656 [2020-08-18 17:53:47,356 INFO L226 Difference]: Without dead ends: 866 [2020-08-18 17:53:47,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:47,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2020-08-18 17:53:47,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 852. [2020-08-18 17:53:47,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 852 states. [2020-08-18 17:53:47,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1234 transitions. [2020-08-18 17:53:47,425 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1234 transitions. Word has length 146 [2020-08-18 17:53:47,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:47,425 INFO L479 AbstractCegarLoop]: Abstraction has 852 states and 1234 transitions. [2020-08-18 17:53:47,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:47,425 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1234 transitions. [2020-08-18 17:53:47,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-18 17:53:47,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:47,428 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-08-18 17:53:47,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 17:53:47,429 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:47,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:47,429 INFO L82 PathProgramCache]: Analyzing trace with hash -399456400, now seen corresponding path program 1 times [2020-08-18 17:53:47,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:47,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358824666] [2020-08-18 17:53:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-08-18 17:53:47,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358824666] [2020-08-18 17:53:47,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:47,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:47,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930376300] [2020-08-18 17:53:47,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:47,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:47,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:47,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:47,519 INFO L87 Difference]: Start difference. First operand 852 states and 1234 transitions. Second operand 5 states. [2020-08-18 17:53:47,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:47,773 INFO L93 Difference]: Finished difference Result 1705 states and 2473 transitions. [2020-08-18 17:53:47,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:47,774 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-08-18 17:53:47,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:47,778 INFO L225 Difference]: With dead ends: 1705 [2020-08-18 17:53:47,778 INFO L226 Difference]: Without dead ends: 850 [2020-08-18 17:53:47,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:47,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2020-08-18 17:53:47,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 836. [2020-08-18 17:53:47,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-08-18 17:53:47,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1211 transitions. [2020-08-18 17:53:47,829 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1211 transitions. Word has length 147 [2020-08-18 17:53:47,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:47,829 INFO L479 AbstractCegarLoop]: Abstraction has 836 states and 1211 transitions. [2020-08-18 17:53:47,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:47,829 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1211 transitions. [2020-08-18 17:53:47,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-18 17:53:47,832 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:47,832 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-08-18 17:53:47,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 17:53:47,833 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:47,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:47,833 INFO L82 PathProgramCache]: Analyzing trace with hash 947927939, now seen corresponding path program 1 times [2020-08-18 17:53:47,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:47,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729317145] [2020-08-18 17:53:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-08-18 17:53:47,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729317145] [2020-08-18 17:53:47,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:47,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:47,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230763772] [2020-08-18 17:53:47,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:47,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:47,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:47,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:47,907 INFO L87 Difference]: Start difference. First operand 836 states and 1211 transitions. Second operand 5 states. [2020-08-18 17:53:48,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:48,200 INFO L93 Difference]: Finished difference Result 1671 states and 2423 transitions. [2020-08-18 17:53:48,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:48,201 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-08-18 17:53:48,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:48,206 INFO L225 Difference]: With dead ends: 1671 [2020-08-18 17:53:48,206 INFO L226 Difference]: Without dead ends: 848 [2020-08-18 17:53:48,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:48,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-08-18 17:53:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 836. [2020-08-18 17:53:48,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 836 states. [2020-08-18 17:53:48,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1204 transitions. [2020-08-18 17:53:48,266 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1204 transitions. Word has length 151 [2020-08-18 17:53:48,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:48,266 INFO L479 AbstractCegarLoop]: Abstraction has 836 states and 1204 transitions. [2020-08-18 17:53:48,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:48,267 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1204 transitions. [2020-08-18 17:53:48,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-18 17:53:48,269 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:48,269 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:48,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 17:53:48,269 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:48,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:48,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1674902650, now seen corresponding path program 1 times [2020-08-18 17:53:48,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:48,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274371115] [2020-08-18 17:53:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:48,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-08-18 17:53:48,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274371115] [2020-08-18 17:53:48,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:48,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 17:53:48,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602256608] [2020-08-18 17:53:48,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:53:48,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:48,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:53:48,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:53:48,353 INFO L87 Difference]: Start difference. First operand 836 states and 1204 transitions. Second operand 5 states. [2020-08-18 17:53:48,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:48,626 INFO L93 Difference]: Finished difference Result 1671 states and 2409 transitions. [2020-08-18 17:53:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:53:48,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-08-18 17:53:48,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:48,631 INFO L225 Difference]: With dead ends: 1671 [2020-08-18 17:53:48,631 INFO L226 Difference]: Without dead ends: 831 [2020-08-18 17:53:48,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:53:48,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2020-08-18 17:53:48,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 819. [2020-08-18 17:53:48,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 819 states. [2020-08-18 17:53:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1175 transitions. [2020-08-18 17:53:48,693 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1175 transitions. Word has length 152 [2020-08-18 17:53:48,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:48,693 INFO L479 AbstractCegarLoop]: Abstraction has 819 states and 1175 transitions. [2020-08-18 17:53:48,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:53:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1175 transitions. [2020-08-18 17:53:48,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-18 17:53:48,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:48,696 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:48,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 17:53:48,697 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:48,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:48,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1165219020, now seen corresponding path program 1 times [2020-08-18 17:53:48,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:48,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780660940] [2020-08-18 17:53:48,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:48,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-08-18 17:53:48,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780660940] [2020-08-18 17:53:48,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:48,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:48,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614074192] [2020-08-18 17:53:48,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:48,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:48,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:48,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:48,772 INFO L87 Difference]: Start difference. First operand 819 states and 1175 transitions. Second operand 3 states. [2020-08-18 17:53:48,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:48,865 INFO L93 Difference]: Finished difference Result 2417 states and 3465 transitions. [2020-08-18 17:53:48,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:48,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-08-18 17:53:48,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:48,873 INFO L225 Difference]: With dead ends: 2417 [2020-08-18 17:53:48,873 INFO L226 Difference]: Without dead ends: 1611 [2020-08-18 17:53:48,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:48,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-08-18 17:53:48,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 821. [2020-08-18 17:53:48,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 821 states. [2020-08-18 17:53:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1177 transitions. [2020-08-18 17:53:48,976 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1177 transitions. Word has length 159 [2020-08-18 17:53:48,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:48,976 INFO L479 AbstractCegarLoop]: Abstraction has 821 states and 1177 transitions. [2020-08-18 17:53:48,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:48,976 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1177 transitions. [2020-08-18 17:53:48,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-18 17:53:48,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:48,978 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:48,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 17:53:48,979 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:48,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:48,979 INFO L82 PathProgramCache]: Analyzing trace with hash 2119159178, now seen corresponding path program 1 times [2020-08-18 17:53:48,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:48,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048183646] [2020-08-18 17:53:48,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-08-18 17:53:49,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048183646] [2020-08-18 17:53:49,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:49,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:49,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503733382] [2020-08-18 17:53:49,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:49,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:49,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:49,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,062 INFO L87 Difference]: Start difference. First operand 821 states and 1177 transitions. Second operand 3 states. [2020-08-18 17:53:49,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:49,164 INFO L93 Difference]: Finished difference Result 2416 states and 3461 transitions. [2020-08-18 17:53:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:49,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-08-18 17:53:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:49,172 INFO L225 Difference]: With dead ends: 2416 [2020-08-18 17:53:49,172 INFO L226 Difference]: Without dead ends: 1608 [2020-08-18 17:53:49,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2020-08-18 17:53:49,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1606. [2020-08-18 17:53:49,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-08-18 17:53:49,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2297 transitions. [2020-08-18 17:53:49,263 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2297 transitions. Word has length 159 [2020-08-18 17:53:49,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:49,264 INFO L479 AbstractCegarLoop]: Abstraction has 1606 states and 2297 transitions. [2020-08-18 17:53:49,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:49,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2297 transitions. [2020-08-18 17:53:49,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-08-18 17:53:49,266 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:49,266 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:49,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-18 17:53:49,267 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:49,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:49,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1294690318, now seen corresponding path program 1 times [2020-08-18 17:53:49,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:49,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681490802] [2020-08-18 17:53:49,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-08-18 17:53:49,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681490802] [2020-08-18 17:53:49,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:49,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:49,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441602857] [2020-08-18 17:53:49,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:49,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:49,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:49,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,428 INFO L87 Difference]: Start difference. First operand 1606 states and 2297 transitions. Second operand 3 states. [2020-08-18 17:53:49,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:49,690 INFO L93 Difference]: Finished difference Result 4752 states and 6785 transitions. [2020-08-18 17:53:49,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:49,691 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2020-08-18 17:53:49,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:49,705 INFO L225 Difference]: With dead ends: 4752 [2020-08-18 17:53:49,705 INFO L226 Difference]: Without dead ends: 3159 [2020-08-18 17:53:49,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2020-08-18 17:53:49,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 1606. [2020-08-18 17:53:49,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1606 states. [2020-08-18 17:53:49,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2293 transitions. [2020-08-18 17:53:49,939 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2293 transitions. Word has length 161 [2020-08-18 17:53:49,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:49,940 INFO L479 AbstractCegarLoop]: Abstraction has 1606 states and 2293 transitions. [2020-08-18 17:53:49,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:49,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2293 transitions. [2020-08-18 17:53:49,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-08-18 17:53:49,943 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:49,943 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:49,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-18 17:53:49,944 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:49,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:49,944 INFO L82 PathProgramCache]: Analyzing trace with hash -179508653, now seen corresponding path program 1 times [2020-08-18 17:53:49,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:49,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768556387] [2020-08-18 17:53:49,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-18 17:53:50,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768556387] [2020-08-18 17:53:50,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:50,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:50,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183908886] [2020-08-18 17:53:50,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:50,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:50,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:50,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,063 INFO L87 Difference]: Start difference. First operand 1606 states and 2293 transitions. Second operand 3 states. [2020-08-18 17:53:50,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:50,421 INFO L93 Difference]: Finished difference Result 4792 states and 6845 transitions. [2020-08-18 17:53:50,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:50,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2020-08-18 17:53:50,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:50,436 INFO L225 Difference]: With dead ends: 4792 [2020-08-18 17:53:50,436 INFO L226 Difference]: Without dead ends: 3199 [2020-08-18 17:53:50,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3199 states. [2020-08-18 17:53:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3199 to 3197. [2020-08-18 17:53:50,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3197 states. [2020-08-18 17:53:50,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 4493 transitions. [2020-08-18 17:53:50,664 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 4493 transitions. Word has length 162 [2020-08-18 17:53:50,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:50,665 INFO L479 AbstractCegarLoop]: Abstraction has 3197 states and 4493 transitions. [2020-08-18 17:53:50,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:50,665 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 4493 transitions. [2020-08-18 17:53:50,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-08-18 17:53:50,668 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:50,668 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:50,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-18 17:53:50,669 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:50,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:50,669 INFO L82 PathProgramCache]: Analyzing trace with hash 774431505, now seen corresponding path program 1 times [2020-08-18 17:53:50,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:50,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715932941] [2020-08-18 17:53:50,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:53:50,714 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:53:50,714 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:53:50,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-18 17:53:50,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:53:50 BoogieIcfgContainer [2020-08-18 17:53:50,759 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:53:50,762 INFO L168 Benchmark]: Toolchain (without parser) took 16017.40 ms. Allocated memory was 141.0 MB in the beginning and 476.1 MB in the end (delta: 335.0 MB). Free memory was 104.0 MB in the beginning and 115.0 MB in the end (delta: -11.1 MB). Peak memory consumption was 323.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:50,763 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 17:53:50,763 INFO L168 Benchmark]: CACSL2BoogieTranslator took 570.84 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 103.7 MB in the beginning and 179.4 MB in the end (delta: -75.6 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:50,763 INFO L168 Benchmark]: Boogie Preprocessor took 64.31 ms. Allocated memory is still 203.9 MB. Free memory was 179.4 MB in the beginning and 176.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:50,764 INFO L168 Benchmark]: RCFGBuilder took 884.11 ms. Allocated memory is still 203.9 MB. Free memory was 176.1 MB in the beginning and 118.4 MB in the end (delta: 57.6 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:50,765 INFO L168 Benchmark]: TraceAbstraction took 14492.85 ms. Allocated memory was 203.9 MB in the beginning and 476.1 MB in the end (delta: 272.1 MB). Free memory was 117.8 MB in the beginning and 115.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 274.8 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:50,767 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 570.84 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 103.7 MB in the beginning and 179.4 MB in the end (delta: -75.6 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 64.31 ms. Allocated memory is still 203.9 MB. Free memory was 179.4 MB in the beginning and 176.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 884.11 ms. Allocated memory is still 203.9 MB. Free memory was 176.1 MB in the beginning and 118.4 MB in the end (delta: 57.6 MB). Peak memory consumption was 57.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14492.85 ms. Allocated memory was 203.9 MB in the beginning and 476.1 MB in the end (delta: 272.1 MB). Free memory was 117.8 MB in the beginning and 115.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 274.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 697]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L702] int s ; [L703] int tmp ; [L707] s = 8464 [L708] CALL ssl3_accept(s) [L12] int s__info_callback = __VERIFIER_nondet_int() ; [L13] int s__in_handshake = __VERIFIER_nondet_int() ; [L14] int s__state ; [L15] int s__new_session ; [L16] int s__server ; [L17] int s__version = __VERIFIER_nondet_int() ; [L18] int s__type ; [L19] int s__init_num ; [L20] int s__hit = __VERIFIER_nondet_int() ; [L21] int s__rwstate ; [L22] int s__init_buf___0 = 1; [L23] int s__debug = __VERIFIER_nondet_int() ; [L24] int s__shutdown ; [L25] int s__cert = __VERIFIER_nondet_int() ; [L26] int s__options = __VERIFIER_nondet_int() ; [L27] int s__verify_mode = __VERIFIER_nondet_int() ; [L28] int s__session__peer = __VERIFIER_nondet_int() ; [L29] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L30] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L31] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L33] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L34] int s__s3__tmp__cert_request ; [L35] int s__s3__tmp__reuse_message ; [L36] int s__s3__tmp__use_rsa_tmp ; [L37] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L38] int s__s3__tmp__new_cipher__algorithms ; [L39] int s__s3__tmp__next_state___0 ; [L40] int s__s3__tmp__new_cipher__algo_strength ; [L41] int s__session__cipher ; [L42] int buf ; [L43] unsigned long l ; [L44] unsigned long Time ; [L45] unsigned long tmp ; [L46] int cb ; [L47] long num1 = __VERIFIER_nondet_long() ; [L48] int ret ; [L49] int new_state ; [L50] int state ; [L51] int skip ; [L52] int got_new_session ; [L53] int tmp___1 = __VERIFIER_nondet_int() ; [L54] int tmp___2 = __VERIFIER_nondet_int() ; [L55] int tmp___3 = __VERIFIER_nondet_int() ; [L56] int tmp___4 = __VERIFIER_nondet_int() ; [L57] int tmp___5 = __VERIFIER_nondet_int() ; [L58] int tmp___6 = __VERIFIER_nondet_int() ; [L59] int tmp___7 ; [L60] long tmp___8 = __VERIFIER_nondet_long() ; [L61] int tmp___9 = __VERIFIER_nondet_int() ; [L62] int tmp___10 = __VERIFIER_nondet_int() ; [L63] int blastFlag ; [L64] int __cil_tmp55 ; [L65] unsigned long __cil_tmp56 ; [L66] unsigned long __cil_tmp57 ; [L67] unsigned long __cil_tmp58 ; [L68] unsigned long __cil_tmp59 ; [L69] int __cil_tmp60 ; [L70] unsigned long __cil_tmp61 = __VERIFIER_nondet_ulong() ; [L74] s__state = initial_state [L75] blastFlag = 0 [L76] tmp = __VERIFIER_nondet_int() [L77] Time = tmp [L78] cb = 0 [L79] ret = -1 [L80] skip = 0 [L81] got_new_session = 0 [L82] COND TRUE s__info_callback != 0 [L83] cb = s__info_callback [L89] s__in_handshake ++ [L90] COND FALSE !(tmp___1 + 12288) [L95] COND FALSE !(s__cert == 0) [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND TRUE s__state == 8464 [L272] s__shutdown = 0 [L273] ret = __VERIFIER_nondet_int() [L274] COND TRUE blastFlag == 0 [L275] blastFlag = 1 [L277] COND FALSE !(ret <= 0) [L280] got_new_session = 1 [L281] s__state = 8496 [L282] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND TRUE s__state == 8496 [L286] ret = __VERIFIER_nondet_int() [L287] COND TRUE blastFlag == 1 [L288] blastFlag = 2 [L290] COND FALSE !(ret <= 0) [L293] COND FALSE !(\read(s__hit)) [L296] s__state = 8512 [L298] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND TRUE s__state == 8512 [L303] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L304] __cil_tmp56 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L305] COND TRUE __cil_tmp56 + 256UL [L306] __cil_tmp56 = 256345 [L307] skip = 1 [L318] s__state = 8528 [L319] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND TRUE s__state == 8528 [L323] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L324] l = (unsigned long )s__s3__tmp__new_cipher__algorithms [L326] __cil_tmp57 = (unsigned long )s__options [L327] COND TRUE __cil_tmp57 + 2097152UL [L328] s__s3__tmp__use_rsa_tmp = 1 [L333] COND TRUE \read(s__s3__tmp__use_rsa_tmp) [L361] ret = __VERIFIER_nondet_int() [L362] COND FALSE !(blastFlag == 3) [L365] COND FALSE !(ret <= 0) [L382] s__state = 8544 [L383] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND FALSE !(s__state == 8528) [L150] COND FALSE !(s__state == 8529) [L153] COND TRUE s__state == 8544 [L387] COND TRUE s__verify_mode + 1 [L388] COND TRUE s__session__peer != 0 [L389] COND TRUE s__verify_mode + 4 [L390] s__verify_mode = 123 [L391] skip = 1 [L392] s__s3__tmp__cert_request = 0 [L393] s__state = 8560 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND FALSE !(! s__s3__tmp__reuse_message) [L686] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND FALSE !(s__state == 8528) [L150] COND FALSE !(s__state == 8529) [L153] COND FALSE !(s__state == 8544) [L156] COND FALSE !(s__state == 8545) [L159] COND TRUE s__state == 8560 [L437] ret = __VERIFIER_nondet_int() [L438] COND FALSE !(ret <= 0) [L441] s__s3__tmp__next_state___0 = 8576 [L442] s__state = 8448 [L443] s__init_num = 0 [L651] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L652] COND TRUE ! s__s3__tmp__reuse_message [L653] COND TRUE ! skip [L654] COND TRUE state == 8560 [L655] COND TRUE s__state == 8448 [L656] COND TRUE s__verify_mode != -1 [L657] COND TRUE s__verify_mode != -2 [L658] COND TRUE __cil_tmp61 != 9021 [L659] COND TRUE __cil_tmp58 != 4294967294 [L660] COND TRUE blastFlag != 4 [L661] COND TRUE tmp___7 != 1024 [L697] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 175 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 14.3s, OverallIterations: 35, TraceHistogramMax: 6, AutomataDifference: 9.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7259 SDtfs, 16112 SDslu, 7753 SDs, 0 SdLazy, 4949 SolverSat, 1408 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 263 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3197occurred in iteration=34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 34 MinimizatonAttempts, 2673 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 3391 NumberOfCodeBlocks, 3391 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 3195 ConstructedInterpolants, 0 QuantifiedInterpolants, 632376 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 34 InterpolantComputations, 34 PerfectInterpolantSequences, 2752/2752 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...